Building Strategies Research Articles

Review of Hot Topics in the Sustainable Development of Energy, Water, and Environment Systems Conference in 2022

The current applications in the energy sector are based largely on fossil fuels which release greenhouse gas emissions to the atmosphere. To face the issue of global warming, the energy sector has to transfer to and develop sustainable energy solutions that do not release carbon emissions. This is one of the primary motivators for the SDEWES conference as well as for this review, and previous ones, examining the most recent works based on sustainable and green energy production in such fields. The 17th Conference on the Sustainable Development of Energy, Water, and Environment Systems (SDEWES) was held on 6–10 November 2022 in Paphos, Cyprus. The SDEWES conference aims at solving complex and ongoing concerns that approach a long-term perspective and supporting innovative solutions and continuous monitoring and evaluation. This review paper aims at collecting the main presented papers focused on the following hot topics: low-carbon technologies based on renewable and clean-energy systems, including mainly biomass, solar, and wind energy applications; energy storage systems; hydrogen-based systems; energy-saving strategies in buildings; and the adoption of smart management strategies using renewable energy systems. These topics are investigated in order to propose solutions to address the issues of climate change, water scarcity, and energy saving. From the analyzed works, we note that some key issues for sustainable development remain to be further addressed: such as novel and advanced energy storage systems, green hydrogen production, novel low-temperature district heating and cooling networks, novel solar technologies for the simultaneous production of power and high temperature heat, solar desalination for hydrogen production systems, and agrivoltaic systems for the production of power and food.

Optimizing building solutions in a changing climate: parameter-based analysis of embodied and operational environmental impacts

Abstract Buildings contribute significantly to global energy consumption and carbon dioxide emissions. Climate change affects building performance, particularly heating and cooling demands. While current policies focus on improving energy performance and reducing operational emissions, the embodied emissions from building materials become more significant in energy-efficient buildings. This study aims to investigate optimal building solutions considering both operational and embodied environmental impact in the context of climate change in the Belgian context. The research questions address the influence of building characteristics on environmental impact and the contribution of embodied and operational emissions to optimal design. The study employs parametric life cycle assessment and dynamic building energy simulation to explore design strategies for a medium-sized office building. The results reveal the trade-offs between operational and embodied impacts. Buildings with better energy performance exhibit higher embodied emissions, highlighting the importance of considering both aspects. Pareto optimal buildings are identified, minimizing total life cycle environmental cost and operational environmental cost. Insulation levels, solar shading, and orientation are key factors in achieving optimal design. HVAC systems and electricity mixes also significantly influence optimal solutions. Lightweight and heavyweight buildings have distinct characteristics affecting heating and cooling demands. Variations in electricity mixes impact energy consumption and environmental costs of different HVAC system scenarios. The study emphasizes the need for a holistic life cycle approach and considering both operational and embodied impacts in building design. It underscores the importance of optimizing building characteristics while addressing climate change challenges. Further research should explore additional factors such as night cooling, HVAC system performance under climate change, and the inclusion of financial costs and visual comfort in the analysis.

Adaptive reused heritage building based on sustainable architecture

Selective reuse of heritage buildings should be based on consideration of strategic issues of sustainable development. Research that discusses the reuse of cultural heritage buildings in the field of architecture still does not implement the concept of sustainable architecture. The purpose of the study is to obtain a strategy formulation that can be used as a parameter for adaptive implementation of reuse in cultural heritage buildings in line with sustainable development. The research took a case study of De Tjolomadoe building in Surakarta City, Indonesia. The building is a former sugar factory building currently converted as a meeting place, tourist destination, and educational communal space. The benefits of the research provide recommendations for adaptive reused strategies for cultural heritage buildings with the concept of sustainable architecture to support sustainable development. The study used in-depth observation with interview techniques and secondary data from the literature as the determination of the most important factor of the concept of sustainable architecture in optimizing the management of cultural heritage buildings. The results show that there are four architectural aspects that need to be considered so that adaptive reused cultural heritage buildings can provide sustainable benefits, i.e., the need for integration and synergy between building history, culture, environment.

Model predictive control for demand response in all-electric school buildings

This paper presents predictive control strategies for all-electric school buildings in cold regions to activate energy flexibility based on changes in electricity prices. A fully electric school building near Montreal, Canada, is used as a case study. This study investigates three scenarios: 1) Reference case with a proportional–integral controller and flat rate electricity price, 2) Model predictive control with flat rate electricity price, and 3) Model predictive control with dynamic electricity price. These scenarios are modelled using the resistance-capacitance thermal networks model, and energy performance is determined and compared over a typical heating season. The proposed approach takes into account the physical parameters of the building, weather predictions, and thermal comfort constraints to maintain optimal energy consumption. A building energy flexibility index is used to quantify the building energy flexibility with a focus on peak demand reduction when the electricity prices are higher than usual. The results show that the MPC strategy can reduce peak power demand by up to 100% and minimize the cost of electricity during demand response events while maintaining acceptable comfort conditions.

Abstract IA030: Ensuring diversity in clinical trials

Abstract It is well known that minorities, particularly Blacks, are underrepresented in cancer prevention, early detection, and treatment trials. However the mortality rates for Blacks are significantly higher than other race/ethnic groups. Research suggests that community involvement is integral to solving public health problems, including involvement in clinical trials-a gold standard. Significant racial/ethnic disparities exist in the accrual of participants for clinical trials. Location and cultural aspects of clinical trials influence recruitment and accrual to clinical trials. Being able to identify and resolve social determinants of health is essential for clinical trial participation. It is increasingly necessary to be aware of defining characteristics, such as location and culture of the populations from which research participants are enrolled. Utilizing embedded community academic sites to adapt clinical trial research in order to increase minority participation in nontherapeutic cancer clinical trials is warranted. Considerable attention has focused on the need to increase underserved racial and ethnic populations in clinical research, especially in light of the cancer health disparities that disproportionately plague these groups. Clinical trial design and implementation are time-consuming and require a multistep process that is complicated by other factors, including eligibility criteria for clinical trials for underserved racial and ethnic populations, recruitment processes, and patients’ misconceptions or lack of information about clinical trials. Georgetown-Lombardi National Capital Area Minority/Underserved NCORP (NCI Community Oncology Research Program) coupled with the Ralph Lauren Center for Cancer Prevention will reveal strategies and approaches instrumental to our success. These efforts resulted in the development of a strong community capacity–building and clinical research cancer recruitment strategy, and improved engagement of the community in clinical research, thus ensuring diversity in clinical trials. Citation Format: Lucile Adams-Campbell. Ensuring diversity in clinical trials [abstract]. In: Proceedings of the 16th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2023 Sep 29-Oct 2;Orlando, FL. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2023;32(12 Suppl):Abstract nr IA030.

Novel Method for Assessing the Protection Lifetime of Building Coatings against Fungi

The aim of this study was to develop a novel method for evaluating the service life of building coatings. In Stage 1, we assessed existing methods for determining the degree of fungal overgrowth on building materials (visual assessment, culture method, luminometric ATP (adenosine-5’-triphosphate) measurement, and spectrophotometric assessment of colour changes). Laboratory tests were carried out for 19 types of facade coating (mineral and silicone with/without primer, silicone paint, biocides) and 7 fungal strains (moulds Alternaria alternata, Aspergillus niger, Aureobasidium melanogenum, Cladosporium cladosporioides, Fusarium sp., Penicillium citrinum, and the yeast Rhodotorula mucilaginosa). The number of fungi on the facade coatings after 28 days of incubation was 1.7 × 105–4.6 × 105 CFUs (colony-forming units)/sample. The ATP content was 12 RLUs–30333 RLUs (relative light units). Colour change was ΔE > 5 depending on the coating type and fungal strain. A high or very high correlation was found between the ATP concentration (RLUs), colour change (ΔE), and the results of the culture method (CFUs/sample). In Stage 2, a new methodology for evaluating the protection lifetime of building coatings against fungi was developed, taking into account environmental conditions (impact of ultraviolet radiation, precipitation, presence of organic matter on the surface, quantitative and qualitative composition of bioaerosol). The developed method consists of one research cycle conducted in the laboratory, corresponding to one year under natural conditions. Preliminary verification showed the model to be compatible with long-term observations (3 years) of fungal growth on the facade coatings under real environmental conditions. The novel method could be used to design biodeterioration control and protection strategies for both new and cultural heritage buildings.

Development of a passive strategy for buildings’ sustainability using green roofs techniques in Taif City, Saudi Arabia

Buildings’ sustainability can strongly contribute towards meeting the Sustainable Development Goals which set forth a challenge for humanity in existing and modern Saudi societies. Recently, large numbers of initiatives and strategies have been recently developed and adopted with a focus on the green architecture which relates the real estate and clean energy industries in Saudi Arabia. This is considered as an important step to the diversity in the Saudi economy, which is not built on oil revenues and towards the achievement of Saudi Arabia’s vision 2030. Consequently, the application of different passive sustainability strategies in residential building projects, e.g., green roofs technology, can boost sustainable building ratings. In the present paper, the feasibility and probable health and environmental benefits associated with green roofs technology in Saudi residential buildings have been described. Moreover, different perspectives have been presented related to the green roofs industry, such as: types, recent technology, and the current challenges. In addition, the contributions of green roofs to the sustainable building’s certification via Saudi rating system, MOSTADAM, has been explored. The method adopted in the present research is based on relating the characteristics of the green roof technology and its environmental effects to the different categories of the “Mostadam” rating system. It is found that the green roofs technology can boost the sustainable building ratings through contribution to the major categories of MOSTADAM rating system a potential of 32% credits total. This encourages stakeholders to apply green roofs in Saudi residential buildings supporting the sustainable development goals of the Saudi government’s ongoing initiatives that advocates for more sustainable and resilient cities considering vision 2030. Moreover, the present study would assist the “Mostadam” responsible in evaluating the sustainable buildings projects and making the right decisions on such projects.

Period Poverty from a Public Health and Legislative Perspective

Period poverty is a global issue that needs to be addressed as a public health crisis. It is directly related to Sustainable Health Goals three, four, five, six, and eight. Period poverty adversely affects the health of anyone capable of menstruating, which is nearly half of the world population, at the physiological, emotional, and psychosocial level. Biases, cultural beliefs, ethical reproductive justice issues, social stigma, and systemic factors contribute to period poverty. Every month, certain menstruators are disproportionately impacted by period poverty and struggle to access basic hygienic necessities. Important stakeholders include not only the individual who experiences menses but also educators and school systems, healthcare professionals, policymakers, public health officials, and researchers. Everyone has a role in addressing period poverty by voting for officials that proactively support legislation, policy, and programs at all levels to effectively advocate for menstrual equity and address barriers contributing to period poverty. This includes policies that increase access to menstrual hygiene products, safe menstrual management methods, and reproductive and women’s health education. Programs globally that focus on capacity building and sustainability strategies can be used as models to reduce period poverty, thereby fostering a sense of empowerment and menstruators’ sense of autonomy, dignity, and equality.

A comparative study of gender differences in healthy office building strategies

BackgroundThe health of office workers has become a major concern under the pressure of increasingly fierce job competition. As countries have gradually promoted healthy buildings, there is an urgent need to create and construct healthy office environments. Although the WELL Building Standard proposed management and design strategies based on the principles of health and medicine, it does not consider group characteristics or gender differences.PurposeThis study aims to apply the theory of planned behavior to healthy building design and supplement the important role of gender and group characteristics in behavioral guidance based on architectural strategies and user behaviors to improve the relevant building evaluation system.MethodsThis study adopted a questionnaire survey and structural equation model. Four WELL-certified healthy office buildings in Nanshan District, Shenzhen, were selected for the survey. Based on the theory of planned behavior, structural equation models for men and women were established, compared, and analyzed. The factors affecting the health behaviors of the two groups and the actual effectiveness of various building optimization strategies were discussed, and an optimization direction for gender differences was proposed.ResultsThe findings indicated differences between male and female staff in their individual characteristics and implementation of health behaviors. Management strategies, subjective design strategies in assistance and guidance, and objective design strategies in spatial planning can promote the health behaviors of the two groups. However, the design strategies of result feedback and detail optimization only appeared to have a significant positive effect on female staff, whereas the intelligent automation design strategies only had an obvious intervention effect on men’s health behaviors.SignificanceThis study found that the theory of planned behavior in the field of social psychology could be applied to relevant research on architectural design and emphasized the influence of gender. It can not only provide the optimization direction for the evaluation standards of relevant healthy buildings but also promote the implementation of health behaviors in office groups and provide new ideas for promoting the development of healthy buildings.

The Effectiveness of Peace Building Strategies Used in the Management of Electoral Conflict in Trans-Nzoia County, Kenya

In recent times, Kenya has had a series of crises after elections, highlighting the imperative of ongoing endeavors to cultivate enduring peace. Understanding the factors that contribute to electoral conflicts is of utmost importance in formulating efficacious strategies for promoting peace. The primary objective of this study was to assess the efficacy of peace-building measures in the management of election tensions in Trans-Nzoia County, Kenya. The study used an evaluation research methodology. After combining basic random and selective sampling methods, a total of 203 respondents and 36 key informants were selected for the study. The data was gathered by means of interview guides and questionnaires. Tables, charts, and figures were used to display the results of the descriptive statistical analysis of the quantitative data collected from the questionnaires. Thematic analysis was used to arrange and analyze the results of the interviews. The findings highlight the efficacy of various peace-building strategies in lowering tensions and avoiding violence before, during, and after elections. These strategies include training, mediation, dialogue, grassroots advocacy, sensitization programs, and attitude-transformation initiatives. Furthermore, the study noted that targeting youth, developing confidence in the electoral management body, an early warning system, and collaboration between security forces and political parties is essential for a peaceful election. The study recommends that it would be beneficial for the Government of Kenya to develop a comprehensive framework that can effectively and methodically lead peace-building operations in the region.

The optimized form of building made from the reused elements

ABSTRACT A resource-effective society considers a circular economy, and this attitude enters the construction industry as well. Various circular building approaches and strategies are introduced to promote a circular economy. However, the design process is complex because it evolves from available components. To address such a gap, in this article, we address design adjustments with the aim of maximizing the reusing of components from an architectural viewpoint, utilizing an applied research method. To achieve the goal, mathematical programming is suggested to make the best use of available components bearing a system approach in circular design in mind. The objective function is the allocation of reclaimed building materials and the decision variables are the needed components. The issue was categorized as integer nonlinear programming (INLP) solved for global optimality utilizing a genetic algorithm (GA). Design variants define different component allocations; thus, the optimum allocation defines the evolved design. Mathematical programming permits defining component allocation variants and the constraints associated with the project. The result of optimization defines the optimum allocation; consequently, it defines the evolved design. The presented procedure is an innovative method that aims to simplify the complexity associated with adjusting the design based on available components. It promotes procurement efficiency because it makes the best use of available material. Moreover, the minimum energy consumption for transportation due to local material usage leads to reuse efficiency.

Community-based participatory planning contribution to social capital for enhanced disaster resilience in rural Matobo, Zimbabwe.

The CBPP process has shown that inclusive planning improves the identification of risks and strengthens collective actions towards design and implementation of resilience building strategies such as water harvesting and health centres.

Analysis of Evacuation Efficiency for Differently-Abled People in Multi-Layered Buildings Based on Assistance Ratio

The term “differently-abled” refers to people with mobility difficulties, including the disabled and the elderly. In order to explore the optimal evacuation efficiency, in emergencies, of different floors in multi-layered buildings where differently-abled people reside, this study has established a mixed evacuation model based on the characteristics of the evacuation behavior of differently-abled people and non-differently-abled people. This model simulated the impact of evacuation strategies on different floors for differently-abled people at various assistance ratios. Through the comparative analysis of various evacuation strategies, an evacuation efficiency analysis model was constructed, which is suitable for multi-layered buildings where differently-abled people reside. The research indicates that, for stair-determined evacuation strategies, when the proportion of assisting personnel exceeds 70%, there is a noticeable improvement in overall evacuation efficiency. For elevator-determined evacuation strategies, evacuating middle floors with unrestricted methods can enhance evacuation efficiency. The analysis model for optimal evacuation efficiency on each floor that is presented in this study, using a five-story building as an example, can clearly and accurately determine evacuation strategies for multi-layered buildings where differently-abled people reside.

The use of numerical models within the BIM environment, for the issue of Cultural heritage restoration. Buildings designed until 1940 in Albania

The study is related to the historical and architectural heritage of the city of Tirana, based on the period of Italian influence until 1940. The stock of these buildings represents an interesting case, in terms of research, since they are close to the 100th anniversary after the construction and have great values for the city, as well as architectural heritage. The lifespan of these objects depends on interventions over the years, conservation, updating with digital monitoring technology and the inclusion of BIM and h-BIM tools in the treatment process. It is important to mention that the building does not only need facade maintenance and refinishing, but by getting to know its fragile parts we can have a seismic retrofit strategy ready. Specifically, this research focuses on several digitization processes, 3D models, simulation and intervention proposals. One of the main aspects is the communication between computer models, dealing with the FEM numerical model and the architectural model inside and outside the BIM environment, reducing the gap between them and without major data loss. After analyzing the collapse scenarios, it is intended to increase the accuracy of seismic retrofit interventions, with the sensitivity that belongs to a cultural heritage object. The application of numerical models for legacy objects presents a challenge since the complexity of handling an old building, the parameters of materials, calibrations and approaching the real response of the building in a seismic situation is known. Applications through BIM tools and files with numerous numerical data tend to make a contribution to the field of seismic engineering and heritage restoration in Albania. Variants with proposals on seismic retrofit strategies for protected buildings will be given at the end of this study.

The Catalan Digital Republic: Between Nation Branding and Nation Building

ABSTRACT This article empirically studies the Catalan Digital Republic, that is the set of practises, narratives, institutions, and infrastructures mobilised by a stateless nation to reposition itself in the international arena. The article has a two-sided objective. First, to analyse how nation branding and nation building strategies intersect with digital technologies and technopolitical narratives. Second, to examine how stateless nations are making use of such technologies and strategies in order to find their way in the international arena. To satisfy these objectives we have empirically studied the case of Catalonia, a stateless nation which in the last years has developed an ambitious technopolitical strategy rebranding itself as the southern European technological hub. To do so we have relied on a triangular methodological strategy combining (1) critical discourse analysis; (2) in-depth interviews with high-profile actors coming from the political, academic, and civil society landscape, and (3) a thorough documentary analysis. The first part of the article explores the concept of digital nation and its relationship with the notion of nation branding. In the second part of the text, we present the methodology and the objectives. We continue the paper by outlining the results of the interviewing process and the critical analysis of the findings. The article concludes with a critical recapitulation of the research results.

Optimizing window ventilation strategies for high-rise residential buildings with U-shaped lightwell: Simulating gaseous pollutant cross-room transmission

The lightwell structure widely used in high-rise residential buildings becomes a pathway for the cross-room transmission of gaseous pollutants. In order to devise effective strategies for window ventilation, it is necessary to conduct research on the transmission characteristics of pollutants in the lightwell. The unsteady-state characteristic of the temperature in natural conditions is represented using a sine function. The transmission of pollutants in the lightwell during the 24 h was simulated by computational fluid dynamics (CFD) employing the RNG k-ε turbulence model and continuous phase model. Three pollution sources were considered at three typical building heights: low floor (5 floors), middle floor (18 floors), and high floor (32 floors). Moreover, the window ventilation time was accurately determined by calculating the room's re-entry ratio near the pollution sources. The results show that the day (24 h) can be divided into three time periods based on the airflow pattern in the lightwell: the downward airflow time (17:00 to 2:30), the upward airflow time (5:00 to 15:00), and the transition time (2:30 to 5:00 and 15:00 to 17:00). During the transition time, pollutant is transmitted both horizontally and vertically, and all rooms around the pollution source are unsuitable for window ventilation.

Visible outside view as a facilitation tool to evaluate view quality and shading systems through building openings

Viewing the natural environment from inside homes and workplaces has been recognized by a range of scholars as having an impact on improving health and well-being. Research has shown that a combination of outdoor elements – such as blue sky, sea view and greenery – is highly preferred as these elements are therapeutic for human wellbeing. However, installing shading systems is an important strategy for passive building cooling but it could affect our sense of connection to the outside environment. Most researchers evaluate view quality using qualitative questionnaires or quantitative methods by analyzing the geometry outside using 2D and 3D software which needs the outdoor environment to be fully built in the simulation accurately takes more time and may cause a system crash to run. This paper presents a new facilitation tool to quantify the visible outside view (VOV) by analyzing the outside view image by converting the view content into red, blue, and green (RGB) pixels using image processing technique. VOV measures the occupant's ray tracking percentage to the visible outside view content taking into consideration the blind factor of shading. An indicator start from 0 % to 100 % is given to quantify the outside view content including shading systems which then the overall VOV is related to the visible outside view quality as a factor of well-being potential (WP). The study found that the shading strategy should not be the same at all levels and shading devices in primary design stages considering the view to the natural elements positively affects occupants' wellbeing potential. These findings suggest that the proposed algorithm needs to be implemented with building energy and daylight simulation to produce more holistic systems. This will be the only way to get efficient and sustainable buildings highly connected with the human dimension.

Carbon-saving benefits of various end-of-life strategies for different types of building structures

Against the backdrop of advocating for ultra-low energy consumption buildings both domestically and internationally, much attention has been attracted to energy consumption and carbon emissions at the end-of-life (EoL) stage from the whole life cycle of buildings. Recycling of construction and demolition wastes (C&DW) is an inevitable step in achieving the goals of ultra-low energy consumption and “carbon neutrality.” In this paper, the life cycle assessment (LCA) theory was employed to study the carbon-saving benefits of four different EoL strategies (i.e., recycling, remanufacturing, reuse, and the integrated strategy) for various building structures (including frame, frame shear wall, shear wall, and light steel structures), in which the carbon-saving potential (CSP) was served as the evaluation index. The results show that compared with the traditional demolition and landfill disposal methods, the implementation of integrated management strategies for structural buildings in this study can reduce carbon emissions by 150.7–246.8 kgCO2-e/m2, with the carbon-savings of 11.9–34.8 times the carbon emissions generated by the abandoned landfill. Among the four structures, the light steel structure has the greatest CSP, reaching (73.75–77.24%), followed by the frame shear wall structure (42.67–46.93%), the frame structure (41.19–45.11%), and the shear wall structure (39.00–43.79%). When the building life span is 50 years, all CSPs of the four structural buildings significantly increased, at this point, deconstruction of the building is the most reasonable approach.

Carbon Emission Reduction Evaluation of End-of-Life Buildings Based on Multiple Recycling Strategies

With the promotion of sustainability in the buildings and construction sector, the carbon saving strategies for the end-of-life (EoL) phase have been receiving increasing attention. In this research, life cycle assessment (LCA) theory was employed to study and compare the carbon savings benefits of three different management strategies (i.e., recycling, remanufacturing, and reuse) on the EoL phase of various buildings (including residential, office, commercial, and school buildings). Moreover, the carbon savings potential (CSP) was calculated and analyzed, which is defined as the percentage of the actual carbon savings to the sum of the total embodied carbon of the building. Results show that compared with traditional demolition and landfill treatment, the implementation of integrated management strategies for residential, office, commercial, and school buildings can reduce carbon emissions by 193.5–526.4 kgCO2-e/m2. Among the building materials, steel bar, structural steel, and concrete account for the major proportion of the total carbon savings of buildings (81.5–93.2%). The sequence of the CSPs for the four types of buildings, in descending order, is school, residential, commercial, and office buildings. A building with a life span of 50 years has the greatest CSP. The results of the study can be used to reduce environmental impacts, and have broad positive implications in terms of sustainable construction.

Rapid Formation of Epitaxial Oxygen Evolution Reaction Catalysts on Dendrites with High Catalytic Activity and Stability.

Oxygen evolution reaction is an essential but kinetically sluggish step in many energy storage and conversion processes and therefore is in pursuit of highly efficient and stable catalysts. Although nanosized transition-metal-based oxides/hydroxides exhibit high catalytic activity toward the oxygen evolution reaction (OER), many of them suffer from low stability at an anode current density in industrial scale. Herein, by combining a rapid epitaxial formation method with dynamic bubble-templated electrodeposition, we successfully developed single crystalline NiFeCu oxide catalysts with a hierarchical porous structure. It was found that the structure can facilitate fast electron transportation for the catalysts and retard the diffusion of the O atoms to the inner metallic current collector. The hierarchical pores inherited from the hydrogen bubble templates built ideal channels for the massive and rapid release of oxygen bubbles. As a consequence, the NiFeCu oxides catalyzed the OER more efficiently and steadily than the commercial RuO2 catalyst at an anode current density in industrial scale (300 mA/cm2). This work, by resolving the durability concerns for nanosized oxides, offers a series of highly efficient and stable catalysts for OER and a structure building strategy to boost the catalytic activity and stability for nonconductive catalysts.