Mediated Mechanism Research Articles

Linking Operational Transparency and Trust in Government: The Mediating Roles of Information Quality and Perceived Effort

Purpose: This research empirically investigates the relationship between operational transparency and citizens' trust in their government through two mediation mechanisms, namely information quality and perceived effort.Study design/methodology/approach: Hypotheses were tested using regression-based mediation analysis, utilizing a series of OLS regression models. Moderated mediation was performed as an additional robustness check.Sample and data: Data were collected from 715 individuals who used a Kuwaiti government website or app within the six months prior to completing an online survey in early 2021.Results: Operational transparency was found to have both "direct" and "indirect" effects on trust. The indirect effects are notably channeled through the proposed mediating mechanisms, highlighting the roles of information quality and perceived effort as key mediators in the relationship between operational transparency and trust in government.Originality/value: The study extends existing research by specifically examining the mediation roles of information quality and perceived effort in the operational transparency-trust dynamic within e-government services. It also develops and validates a survey-based measure for perceived operational transparency, which can be used by researchers and practitioners aiming to gauge individual perceptions of operational transparency in service contexts.Research limitations/implications: Strengthening operational transparency can boost citizen trust in government services. Yet, the study’s findings are constrained by its cross-sectional design, highlighting the need for future research with different methods and longer-term analyses.

Environmental, Social and Governance Performance on Brand Value in the Context of “Dual Carbon”: The Mediating Effect of R&D Innovation

As an important asset of an enterprise, brand value reflects its competitive position in the market. With the proposed goal of “carbon peak” and “carbon neutrality”, the development of enterprises is paying more and more attention to ESG performance (that is, the performance of enterprises in environmental, social and governance aspects), and the attention of brand management is slowly shifting away from traditional products and markets into being green and sustainable. In order to verify the relationship between ESG performance and brand value, this study takes Chinese A-share listed enterprises from 2012 to 2021 as research samples to reveal the mechanism of ESG performance’s impact on brand value. The results show that ESG performance can significantly improve brand value, indicating that the investment in ESG will ultimately affect brand value. The mediation mechanism analysis shows that R&D innovation plays a mediating role in the relationship between the two. A heterogeneity analysis shows that the ESG performance of state-owned enterprises and large enterprises has a stronger promoting effect on brand value, while small enterprises do not show heterogeneity. The research results provide new evidence to reveal the impact of ESG performance on brand management, and have reference significance for ESG construction, brand marketing innovation, and corporate green innovation.

Structural Equation Modelling as a Proof-of-Concept Tool for Mediation Mechanisms Between Topical Antibiotic Prophylaxis and Six Types of Blood Stream Infection Among ICU Patients.

Whether exposing the microbiome to antibiotics decreases or increases the risk of blood stream infection with Pseudomonas aeruginosa, Staphylococcus aureus, Acinetobacter, and Candida among ICU patients, and how this altered risk might be mediated, are critical research questions. Addressing these questions through the direct study of specific constituents within the microbiome would be difficult. An alternative tool for addressing these research questions is structural equation modelling (SEM). SEM enables competing theoretical causation networks to be tested 'en bloc' by confrontation with data derived from the literature. These causation models have three conceptual steps: exposure to specific antimicrobials are the key drivers, clinically relevant infection end points are the measurable observables, and the activity of key microbiome constituents on microbial invasion serve as mediators. These mediators, whether serving to promote, to impede, or neither, are typically unobservable and appear as latent variables in each model. SEM methods enable comparisons through confronting the three competing models, each versus clinically derived data with the various exposures, such as topical or parenteral antibiotic prophylaxis, factorized in each model. Candida colonization, represented as a latent variable, and concurrency are consistent promoters of all types of blood stream infection, and emerge as harmful mediators.

Noradrenergic alpha-2a receptor stimulation enhances prediction error signaling and updating of attention sets in anterior cingulate cortex and striatum

The noradrenergic system is believed to support behavioral flexibility. A possible source mediating improved flexibility are α2A adrenoceptors (α2AR) in prefrontal cortex (PFC) or the anterior cingulate cortex (ACC). We tested this hypothesis by stimulating α2ARs using Guanfacine during attentional set shifting in male nonhuman primates. We found that α2AR stimulation improved learning from errors and updating attention sets. Neural recordings in the ACC, dorsolateral PFC, and the striatum showed that α2AR stimulation selectively enhanced neural signaling of prediction errors in neurons of the ACC and the striatum, but not in dlPFC. This modulation was accompanied by enhanced encoding of attended target features and particularly apparent in putative fast-spiking interneurons, pointing to an interneuron mediated mechanism of α2AR action. These results reveal that α2A receptors are part of the causal chain of flexibly updating attention sets through an enhancement of outcomes and prediction error signaling in ACC and striatum.

Cognitive Mechanisms Between Psychosocial Resources and the Behavioral Intention of Professional Help-Seeking for Internet Gaming Disorder Among Chinese Adolescent Gamers: Cross-Sectional Mediation Study.

Internet gaming disorder (IGD) is a global public health concern for adolescents due to its potential severe negative consequences. Professional help-seeking is important for early screening, diagnosis, and treatment of IGD. However, research on the factors associated with professional help-seeking for IGD as well as relevant mediation mechanisms among adolescents is limited. Based on the stress coping theory, the conservation of resource theory, and behavioral change theories, this study investigated the prevalence and factors influencing the behavioral intention of professional help-seeking for internet gaming disorder (BI-PHSIGD). The research also explored the underlying mechanisms, including psychosocial resources like resilience and social support, perceived resource loss due to reduced gaming time, and self-efficacy, in professional help-seeking among adolescent internet gamers. A cross-sectional survey was conducted among secondary school students who were internet gamers in 2 Chinese cities from October 2019 to January 2020. Data from the full sample (N=1526) and a subsample of 256 IGD cases (according to the 9-item DSM-5 [Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition] IGD Checklist) were analyzed. Multivariate logistic regression analysis was conducted to examine the factors of BI-PHSIGD, while structural equation modeling was performed to test the proposed mediation mechanisms. The prevalence of BI-PHSIGD was 54.3% (829/1526) in the full sample and 40.6% (104/256) in the IGD subsample (vs 708/1239, 57.1% among non-IGD cases). In the full sample, psychosocial resources of resilience (adjusted odds ratio [aOR] 1.03, 95% CI 1.02-1.05) and social support (aOR 1.03, 95% CI 1.02-1.04) as well as self-efficacy in professional help-seeking (aOR 1.64, 95% CI 1.49-1.81) were positively associated with BI-PHSIGD, while perceived resource loss due to reduced gaming time was negatively associated with BI-PHSIGD (aOR 0.97, 95% CI 0.96-0.98); the positive association between psychosocial resources and BI-PHSIGD was fully mediated via 2 single-mediator indirect paths (via self-efficacy in professional help-seeking alone: effect size=53.4%; indirect effect/total effect=0.10/0.19 and via perceived resource loss due to reduced gaming time alone: effect size=17.8%; indirect effect/total effect=0.03/0.19) and one 2-mediator serial indirect path (first via perceived resource loss due to reduced gaming time then via self-efficacy in professional help-seeking: effect size=4.7%; indirect effect/total effect=0.009/0.19). In the IGD subgroup, a full mediation via self-efficacy in professional help-seeking alone but not the other 2 indirect paths was statistically significant. Many adolescent internet gamers, especially those with IGD, were unwilling to seek professional help; as a result, early treatment is often difficult to achieve. To increase BI-PHSIGD, enhancing psychosocial resources such as resilience and social support, perceived resource loss due to reduced gaming time, and self-efficacy in professional help-seeking may be effective. Future longitudinal and intervention studies are needed to confirm and extend the findings.

Research on the Impact of Environmental Inequality on Labor Mobility—A Study Based on the China General Social Survey (CGSS)

In recent years, as the capital-driven economic growth model gradually encounters bottlenecks and regional economic competition intensifies, governments at all levels have turned to attracting high-quality talent to promote economic transformation and upgrading. Against this backdrop, the quality of the ecological environment has gradually become an important factor affecting labor mobility. This paper explores the impact of environmental inequality on labor mobility by matching provincial and municipal data with micro-data from the Chinese General Social Survey (CGSS), especially focusing on how environmental inequality affects labor decision-making through cognitive and non-cognitive abilities. The results from the benchmark regression confirm that environmental inequality significantly suppresses labor mobility, while robustness tests further validate these findings. Additionally, the mediation mechanism analysis reveals that environmental inequality influences labor mobility through impairments in both cognitive and non-cognitive abilities. The study also conducts an analysis of the heterogeneity of different social groups, finding that environmental inequality has a particularly significant impact on groups with higher levels of education, property owners, and residents living in economically disadvantaged areas. Based on this, the paper puts forward policy recommendations for different groups, emphasizing the importance of optimizing environmental quality, improving education levels, and enhancing the social support system. The research conclusions provide theoretical support for local governments in enhancing regional competitiveness and attracting high-quality labor.

Socially responsible human resource management for sustainable performance in a moderated mediation mechanism

This study examines Socially Responsible Human Resource Management (SRHRM) for the common good through the connections between the psychological green climate (PGC) and employee green behavior (EGB). In doing so, it explores the influence of SRHRM and PGC on EGB and sustainable performance (SP) as well as the moderating effect of PGC on EGB for organizing sustainable dimensions of HRM for environmental common goods. Drawing on the notion of the common good, this study mobilizes the ability motivation opportunity theory to articulate the nexus of business ethics and the environment. This study is quantitative in nature, following the deducting reason approach. Data were collected from 307 manufacturing companies using a survey. To ensure robustness, structural equation modeling using the AMOS software was used to analyze the data. The study's results show that both SRHRM and PGC directly influence EGB, which proxies to affect the organizational SP precisely. However, the results also show that SRHRM has no significant direct repercussions on SP, and the analysis of the moderation effect revealed that PGC does not intervene in the relationship between SRHRM and EGB. This paper contributes to an interesting conjuncture of growing literature on the adoption and impact of SRHRM and SP, which we argue can become the epicenter of ethical business processes to ensure the common environmental good. This study shows that organizations can flourish sustainable behavioral aspects, values, norms, and practices in business processes and among employees by nurturing the tenets of SRHRM, PGC, and EGB, which will increase the organizational capacity to transform the environmental common good.

Carbon offset payment intentions in aviation industry: Altruism vs. Egoism and airline sustainability

Purpose The issue of excessive carbon emissions continues to be a critical global challenge. As a prominent mode of transportation for long-distance travel, aircraft is widely acknowledged as a significant source of these emissions. Carbon offset initiatives function as ecological measures, helping to reduce the negative environmental impact. This study aims to explore how benefit appeals (BA) within the aviation industry impact tourists’ carbon offset payment intentions (COPIt). Design/methodology/approach In Studies 1 and 2, scenario-based experiments were conducted to explore how goal framing (GF) and (BA) interact to influence COPIt. Study 2 further investigated the mediating roles of moral responsibility and trust in airlines within this interaction. Study 3 used real-world surveys to examine the moderating influence of moral elevation, thereby supporting the interactive effects and mediation mechanisms identified in the earlier studies. Findings Across three studies, the authors consistently identified pivotal factors shaping COPIt in the context of air travel. Study 1 revealed that the combination of BA and GF significantly impacts COPIt, with egoistic appeals linked to loss framing and altruistic appeals connected to gain framing being particularly effective in encouraging COPIt. Study 2 extended these insights by showing that moral responsibility and trust in airlines serve as mediators between BA, GF and COPIt. In Study 3, moral elevation was found to moderate the influence of BA and GF on both moral responsibility and COPIt, deepening the understanding of these dynamics. Originality/value This study expands the range of factors affecting COPIt and delves into the underlying mechanisms through which BA and GF shape COPIt. Additionally, it advances current understanding by revealing the intricate processes influenced by moral elevation. The findings not only contribute to the existing knowledge on COPIt determinants but also offer practical guidance for the aviation industry and related sectors in promoting tourists’ participation in carbon offset programs.

Mobile phone addiction and self-injury in adolescents with MDD: mediation by self-esteem and depression, and the failure of usage restrictions

BackgroundPrevious studies have suggested a significant association between mobile phone addiction (MPA) and non-suicidal self-injury (NSSI) in general adolescents. However, limited research has analyzed this relationship in clinical populations, such as those with major depressive disorder (MDD), and the potential mediation mechanisms remain unclear.MethodsThis cross-sectional observational study analyzed data from 2343 adolescents with MDD (77.9% females; mean age = 14.99 years, SD = 1.65). Using mediation models, we explored the roles of self-esteem and depression severity (measured by Patient Health Questionnaire-9) in the relationship between MPA and NSSI. Additionally, we evaluated the associations between existing school-implemented mobile phone usage policies and levels of MPA, self-esteem, depression symptoms, and NSSI.ResultsMPA was significantly associated with NSSI, with low self-esteem and increased depression severity almost entirely mediating this effect (log-odds = 0.016, 95%CI = 0.02–0.013). Subdomains of MPA, including inability to control craving, feelings of anxiety, and productivity loss, followed similar mediation models, while the subdomain of withdrawal/escape had a partial effect mediated by depression severity. Additionally, enforced restrictions on mobile phone usage in schools did not show positive effects on related variables and even exacerbated MPA by increasing cravings and reducing productivity.ConclusionOur study suggests that MPA in adolescents with MDD may be an important risk factor for NSSI occurrence, and that reducing the negative impact of mobile phone usage on self-esteem and depressive symptoms, rather than simply restricting usage, may be crucial for effective intervention.

ARID1A recruits GATA2 to regulate the senescence of trophoblast cells under high-glucose condition

IntroductionGestational diabetes mellitus (GDM) is a common complication during pregnancy. The hyperglycemic stimulation of gestational diabetes inhibits the invasion of the placental trophoblast cells. Some studies have indicated that the senescence of trophoblast cells weakens their invasive capacity, while the mechanism of trophoblast cells senescence in GDM remain elusive. MethodsWe performed western blotting and Immunohistochemical staining to investigate AT-Rich Interaction Domain 1A (ARID1A) expression in GDM placental tissues. 5 mM and 30 mM glucose treated HTR-8/SVneo cells to simulate normal glucose (NG) stress and high glucose (HG) stress. Cell proliferation capacity was investigated by CCK8 assay and cell cycle assay. SA-β-gal was used to detect cellular senescence. Chip-seq characterized the binding site of ARID1A to CDKN1A. In conjunction with bioinformatics analysis, co-immunoprecipitation assays, Chip-qPCR and luciferase reporter assays were performed to prove ARID1A recruits GATA2 to CDKN1A. ResultsWe found that ARID1A has a higher expression levels in GDM placental tissues compared to the control. ARID1A overexpression suppressed cell proliferation, induced cell cycle arrest and promoted cell senescence. Conversely the inhibition of ARID1A significantly rescues HG induced senescence of trophoblast cells. To further characterize the mechanism by which ARID1A regulate the transcription of CDKN1A, co-immunoprecipitation assays, Chip-qPCR and luciferase reporter assay indicate that ARID1A recruits GATA2 to regulate the transcriptional activity of CDKN1A. DiscussionOur study uncovers a ARID1A mediated regulatory mechanism in GDM trophoblast cell senescence and suggests that targeting the placental ARID1A might provide new diagnostic and therapeutic strategies for GDM.

Exploring consumers’ innovative products adoption process: based on technology readiness and value-based adoption

ABSTRACT This study seeks to empirically verify whether technology readiness composed of facilitating factor and inhibiting factor, affects consumer’s decision on innovation adoption. In addition, in an attempt to explore the mediation mechanism, the study sought to confirm whether technology readiness impacts consumers’ adoption decision through the dual paths, employing double sided perceptions with regards to perceived benefits and perceived sacrifices of the innovation. Finally, the study examines the moderating effect of psychological distance on the relationships between perceived benefits (and sacrifices) and adoption intention. Result of the study revealed that innovativeness affects the intention to adopt innovative products. Perceived benefits (and sacrifices) mediated the relationship between technology readiness and the intention to adopt innovative products. Finally, the study confirmed that the psychological distance moderates the relationship between perceived benefits (and sacrifices) and the intention to adopt innovative products.

Service robot performance and hospitality employees’ job loss insecurity and turnover*

Robots have gained researchers’ attention as new technologies advance in the hospitality industry. In recent years, the worldwide demand for automation has caused the idea of serving robots to raise business sustainability through technological innovations. This study aimed to analyze the efficacy of service robots on employee job loss insecurity and turnover intention. A convoluted mediation and moderation mechanism among study constructs is uncovered using a quantitative process. Our results demonstrate that robot performance efficacy positively relates to robot perceived usefulness and speed of service and positively affects employees’ job loss insecurity. Robot perceived usefulness and speed of service mediate the relationship between robot performance efficacy and employees’ job loss insecurity. The study’s findings also revealed the effect of job loss insecurity on turnover intention. Psychological aspects positively mediate the relationship between job loss insecurity and turnover intention.

Role of workforce analytics in fulfillment experience of employees through work volition

Purpose Labor process theory explains that employers prefer technology and systems over employees for efficiency gains. However, the mechanisms explaining the influence of technology and systems on different work-related employee outcomes are still a question mark. The purpose of this study is to test a mediation mechanism explaining how workforce analytics influence the work fulfillment experience of employees through work volition. Design/methodology/approach This study collected dyadic data from 55 HR managers and 350 employees serving in 55 different subsidiaries of Multinational Corporations in Pakistan. Findings The statistical results demonstrate that workforce analytics negatively affect fulfillment at work. However, work volition may reduce the negative relationship between workforce analytics and fulfillment at work. This study also found a significant but negative relationship between work volition and fulfillment at work. Originality/value This study found that integrating the use of workforce analytics with the work volition of employees is critical for positive employee outcomes.

Tinjauan Yuridis terhadap Penyelesaian Sengketa Tanah di Jakarta Barat

T Land dispute resolution is a complex issue in Indonesia, especially in urban areas such as West Jakarta. These disputes often involve the sale and purchase of the land in question, as in case Number 59/Pdt.G/2023/PN Jkt.Brt. This study aims to analyze juridically the settlement of land disputes and how they are implemented in the Indonesian legal system. The method used in this study is normative legal research that focuses on literature review. The results of the study show that the implementation of mediation as one of the dispute resolution methods provides equal justice for both parties, and can result in a peace agreement that has legal force. The conclusion of this study is that the mediation mechanism has great potential in resolving land disputes more effectively than the litigation route.

Molecular Scarring in Relapsing Psoriasis: Crosstalk of Keratinocytes and Immune Cells

Abstract Introduction/Objective Psoriasis is a chronic skin disorder with a tendency for relapse, characterized by immune- mediated mechanisms leading to papulosquamous lesions. Despite advances in treatment, many patients experience relapse, particularly in previously healed areas, referred to as “molecular scarring.” This scarring suggests a complex interaction between keratinocytes and immune cells, including tissue-resident memory T cells (TRMs), cytokines, and epigenetic modifications, contributing to the pattern-specific recurrence of psoriasis. Methods/Case Report After reviewing 31 articles on PubMed, we focused on the immunopathogenesis of psoriasis, examining the role of TRMs, the balance between regulatory T cells (Tregs) and Th17 cells, and the impact of various treatment modalities on disease recurrence. It evaluates the expression of TRM markers and the effectiveness of treatments such as anti-IL-17 agents and phototherapy in altering disease progression. The study also explores the genomic characteristics of psoriatic lesions post-treatment and the duration of clinical remission associated with different therapeutic approaches. Results (if a Case Study enter NA) The findings demonstrate a significant role of TRMs in psoriasis relapse, with environmental triggers reactivating these cells and leading to the production of inflammatory cytokines. Treatments targeting IL-17 showed a rapid decrease in TRM markers, particularly in the dermis, and were associated with different durations of disease remission based on the therapeutic approach. The study also found that the genomic profile of treated lesions does not fully normalize, with variations in gene expression linked to the type of treatment and possibly influencing the size of the molecular scar and relapse duration. Conclusion Psoriasis relapse is intricately linked to the presence of TRMs and the molecular scarring of previously healed lesions, influenced by various treatment modalities. The study underscores the importance of targeting TRMs and adjusting therapeutic strategies to extend the period of clinical remission and prevent the transition to more severe disease forms. Future research should focus on elucidating the detailed mechanisms of psoriasis relapse and developing targeted treatments to normalize the genomic profile of healed skin, ultimately improving patient outcomes and management of the disease.

Study on the Promotional Effect and Mechanism of New Quality Productive Forces on Green Development

The new quality productive forces have the potential to spur both the green transformation of the industrial structure and innovative advances in green technology, which will further strengthen the foundation for sustainable growth. This study analyzes panel data from 30 provinces between 2012 and 2022 to build an evaluation system for new quality productive forces and green development at the provincial level. The entropy weight TOPSIS approach is used to assign weights to each indicator. Methods including fixed effects, mediation effects, and spatial econometrics are used to examine the contribution of new quality productive forces to green development and its mediation mechanism. The study finds that: (1) New quality productive forces significantly promote green development, and the conclusion still holds after a robustness test using the instrumental variables method and excluding municipalities. (2) The new quality productive forces contribute significantly to green development by improving technology and optimizing industrial structure. (3) The new quality productive forces not only directly enhance the green development level of the region, but also positively influence the green development level of the neighboring regions through the spatial spillover effect. (4) The eastern and central regions are more affected by new productivity in terms of green development. Based on these, efforts should be made to develop new quality productive forces, increase technological research and investment, and promote the development of industrial structure to be more environmentally friendly and efficient to promote green development.

Air Pollution and Urban Economic Growth: A Study Based on Dynamic Models

<p class="Paragraph"><span lang="EN-US">With China's economic growth, the issue of air pollution has become increasingly prominent. As the core of political and economic development, 184 major cities in China face severe air pollution and significant environmental pressures due to high population density. Consequently, China has established key urban environmental monitoring stations in these cities to monitor pollution emissions in real time. This paper utilizes panel data from 184 Chinese cities spanning 2012-2022 and employs dynamic GMM models, fixed effects models, and mediation effect models to empirically examine the impact of air pollution on urban environmental pollution and its mediation mechanisms. From the perspective of cities with different income levels, a dynamic GMM model is established to determine the correlation between air pollution and various factors influencing urban economic growth. The study finds that air pollution significantly reduces economic growth in Chinese cities at the 1 per cent level, with each unit increase in air pollution reducing economic growth in Chinese cities by 0.84 units. Urbanization and human capital are identified as two crucial channels through which air pollution affects the economic development of Chinese cities. The negative impact of air pollution on economic growth is more pronounced in larger cities compared to smaller ones, and the adverse effects of haze pollution become increasingly significant over time. Therefore, policymakers should take the cultivation and application of new quality productivity as a key strategy to enhance the quality of economic development, and realise a win-win situation between economic growth and environmental protection through scientific and technological innovation and industrial restructuring. This will not only help alleviate the air pollution problem, but also inject new momentum into the high-quality development of China’s economy.</span></p>

Dimensions of ethical consumption: A systematic review and future outlook

AbstractUN's sustainable development goals view ethical consumption as a multi‐dimensional construct addressing production and consumption‐related sustainability challenges. The present study is the first to assimilate the five dimensions of ethical consumption—concern for environment, love of organic, preference for fair trade, regard for animal welfare, and anti‐consumption/boycott movements—in a single review. This framework‐based review using Theory‐Context‐Characteristic‐Methods (TCCM) and employing Scientific Procedures and Rationales for Systematic Literature Reviews (SPAR‐4 SLR) protocol, thoroughly synthesizes the state of knowledge, identifies research gaps and proposes directions for future research in ethical consumption. The authors review 123 articles from 2000 to 2024 sourced from SCOPUS by thoroughly examining antecedents, mediators, moderators, outcome variables, and interrelationships for all five dimensions. The authors recommend applying new consumer personality theories instead of familiar frameworks, adopting qualitative methods and longitudinal designs with multicultural and cross‐national focus, and testing novel mediation and moderation mechanisms in clarifying interrelationships.

Recent Research on Iridium-Based Electrocatalysts for Acidic Oxygen Evolution Reaction from the Origin of Reaction Mechanism.

As the anode reaction of proton exchange membrane water electrolysis (PEMWE), the acidic oxygen evolution reaction (OER) is one of the main obstacles to the practical application of PEMWE due to its sluggish four-electron transfer process. The development of high-performance acidic OER electrocatalysts has become the key to improving the reaction kinetics. To date, although various excellent acidic OER electrocatalysts have been widely researched, Ir-based nanomaterials are still state-of-the-art electrocatalysts. Hence, a comprehensive and in-depth understanding of the reaction mechanism of Ir-based electrocatalysts is crucial for the precise optimization of catalytic performance. In this review, the origin and nature of the conventional adsorbate evolution mechanism (AEM) and the derived volcanic relationship on Ir-based electrocatalysts for acidic OER processes are summarized and some optimization strategies for Ir-based electrocatalysts based on the AEM are introduced. To further investigate the development strategy of high-performance Ir-based electrocatalysts, several unconventional OER mechanisms including dual-site mechanism and lattice oxygen mediated mechanism, and their applications are introduced in detail. Thereafter, the active species on Ir-based electrocatalysts at acidic OER are summarized and classified into surface Ir species and O species. Finally, the future development direction and prospect of Ir-based electrocatalysts for acidic OER are put forward.

Exceptional Strength-Ductility Combinations of a CoCrNi-Based Medium-Entropy Alloy via Short/Medium-Time Annealing after Hot-Rolling.

Strong yet ductile alloys have long been desired for industrial applications to enhance structural reliability. This work produced two (CoCrNi)93.5Al3Ti3C0.5 medium-entropy alloys with exceptional strength-ductility combinations, via short/medium (3 min/30 min) annealing times after hot-rolling. Three types of intergranular precipitates including MC, M23C6 carbides, and L12 phase were detected in both samples. Noticeably, the high-density of intragranular L12 precipitates were only found in the medium-time annealed sample. Upon inspection of the deformed substructure, it was revealed that the plane slip is the dominant deformation mechanism of both alloys. This is related to the lower stacking fault energy, higher lattice friction induced by the C solute, and slip-plane softening caused by intragranular dense L12 precipitates. Additionally, we noted that the stacking fault and twinning act as the mediated mechanisms in deformation of the short-time annealed alloy, while only the former mechanism was apparent in the medium-time annealed alloy. The inhibited twinning tendency can be attributed to the higher energy stacking faults and the increased critical twinning stress caused by intragranular dense L12 precipitates. Our present findings provide not only guidance for optimizing the mechanical properties of high/medium-entropy alloys, but also a fundamental understanding of deformation mechanisms.