Powder Slurry Research Articles

3D-printed zeolite 13X gyroid monolith adsorbents for CO2 capture

Self-standing 3D-printed gyroid monoliths of zeolite 13X were fabricated for the first time for carbon dioxide adsorption. Gyroid sheet-based triply periodic minimal surface (TPMS) lattices provide high surface area per unit volume, smooth surfaces with no discontinuities, and low pressure drop compared to powder and beads, which are essential in gas adsorption. A photopolymer resin and zeolite 13X powder slurry was 3D-printed by digital light processing followed by debinding to remove the polymer and sintering to diffuse and consolidate the zeolite 13X particles. The sintered adsorbents were mechanically stable, and structural and morphological analyses revealed the interconnected nature of the gyroid cells permitting CO2 molecules to easily diffuse into the printed structure, thus ensuring sufficient adsorbent/adsorbate contact. The gyroid zeolite monoliths reached an equilibrium adsorption capacity of 3.5 mmol g−1 in 77 min at 25 °C and 1 bar, whereas the beads and powder required 96 and 100 min, respectively, while after 20 pressure swing adsorption (PSA) cycles, the zeolite monolith showed sustainable performance compared to the powder. The CO2/N2 selectivity ranged from 328 (at 50 mbar) to 51 (at 1 bar) at 25 °C for the zeolite monolith, whereas the powder exhibited selectivity values in the range of 294 (at 50 mbar) to 33 (at 1 bar). Dynamic breakthrough experiments using CO2/N2 mixtures confirmed the fast kinetics and separation performance of the monoliths, while the pressure drop was also significantly lower than the powder and the beads. The novel topology of the developed self-standing gyroid zeolite monoliths eliminate the need for structuring of powdered adsorbents and exhibit competitive performance, enhanced kinetics and cyclability, and reduced pressure drop toward large-scale carbon capture application.

Microstructure and properties of multicomponent silicide ceramic coatings on Ta substrate prepared by slurry sintering method

High entropy silicide (Mo0.2Cr0.2Ta0.2Nb0.2W0.2)Si2 (named as MeSi2) coating was successfully prepared on Ta substrate by slurry sintering method. Firstly, precursor powders were initially obtained through mechanical alloying of silicide powders. Then powder slurry was coated on Ta substrate, and then the samples were sintered. For comparison, TaSi2 coating prepared by halide-activated pack cementation method was synthesized. Subsequently, the static oxidation resistance of both MeSi2 coating and TaSi2 coating was examined at 1200 °C, results revealing that the MeSi2 coating demonstrates an effective protection time of more than 60 h. The protective effect and duration of the MeSi2 coating on Ta substrate are significantly greater than that of TaSi2, indicating an improvement oxidation resistance due to the high entropy effect of the silicide coating. After oxidation, the coating evolved an outer SiO2 layer, followed by MeSi2, Me5Si3, TaSi2, and Ta5Si3 layers. As the oxidation progressed, MeSi2 gradually transformed into Me5Si3, leading to a loss of the coating's antioxidant capacity.

Development of a novel extrusion device to improve the printability of 3D printable geopolymer concrete

This study explores the printability of 3D geopolymer concrete using a novel extrusion device. Geopolymer, known for its eco-friendliness and rapid curing, offers an eco-friendly alternative to conventional cement in 3D printing. A novel extrusion device, integrating mixing and stirring functions, was developed to blend sodium silicate powder and precursor slurry effectively. Systematic experiments on mixing ratio, time, and speed revealed optimal conditions for geopolymer concrete printability. The precursor slurry remained pumpable for 90 min and displayed rapid reactivity in the new device. The extruded geopolymer concrete exhibited exceptional buildability, reaching a remarkable yield strength growth rate of 931.69 Pa/s. Actual printing tests resulted in a 154-layer hollow cylinder, 1840 mm tall, printed in just 26.87 min. Increasing mixing time enhanced compressive strength and reduced porosity, showcasing the potential of this set-on-demand approach and the novel extrusion device in 3D printable geopolymer concrete applications.

Controllable Technology for Thermal Expansion Coefficient of Commercial Materials for Solid Oxide Electrolytic Cells.

Solid oxide electrolysis cell (SOEC) industrialization has been developing for many years. Commercial materials such as 8 mol% Y2O3-stabilized zirconia (YSZ), Gd0.1Ce0.9O1.95 (GDC), La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF), La0.6Sr0.4CoO3-δ (LSC), etc., have been used for many years, but the problem of mismatched thermal expansion coefficients of various materials between cells has not been fundamentally solved, which affects the lifetime of SOECs and restricts their industry development. Currently, various solutions have been reported, such as element doping, manufacturing defects, and introducing negative thermal expansion coefficient materials. To promote the development of the SOEC industry, a direct treatment method for commercial materials-quenching and doping-is reported to achieve the controllable preparation of the thermal expansion coefficient of commercial materials. The quenching process only involves the micro-treatment of raw materials and does not have any negative impact on preparation processes such as powder slurry and sintering. It is a simple, low-cost, and universal research strategy to achieve the controllable preparation of the thermal expansion coefficient of the commercial material La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) through a quenching process by doping elements and increasing oxygen vacancies in the material. Commercial LSCF materials are heated to 800 °C in a muffle furnace, quickly removed, and cooled and quenched in 3.4 mol/L of prepared Y(NO3)3. The thermal expansion coefficient of the treated material can be reduced to 13.6 × 10-6 K-1, and the blank sample is 14.1 × 10-6 K-1. In the future, it may be possible to use the quenching process to select appropriate doping elements in order to achieve similar thermal expansion coefficients in SOECs.

Vancomycin Three Ways: Multimodal Utilization of Intraoperative Antibiosis in Complex Foot and Ankle Infection

Osteomyelitis of the foot and ankle is an unfortunate, albeit pervasive, complication faced by orthopedic surgeons and their patients. Chronic osteomyelitis confers a great risk of amputation and protracted hospital admission in patients with diabetes, existing orthopedic hardware, and/or compromised tissue perfusion. The current standard of practice in the treatment of osteomyelitis is the initiation of broad antibiotic coverage followed by subsequent narrowing informed by culture data and sensitivities. While mild to moderate infections are treated with oral antibiotics, more severe infections are often treated using intravenous (IV) antibiotics. Vancomycin, in its IV form, is frequently administered intraoperatively for patients with osteomyelitis as it confers adequate coverage of common causative organisms, including staphylococcus aureus. However, given the diminished blood flow to distal extremities commonly seen in patients experiencing this complication, inadequate distribution of oral or IV antibiotics may occur. This is especially problematic, as it leads to an increased risk of recurrent infection and the ultimate need for amputation. Here, we present an alternate method of intraoperative vancomycin administration for patients with chronic osteomyelitis in the form of paste, powder, and injectable slurry. Postoperatively, oral or IV antibiotics are continued based on OR culture susceptibility. We found this to be an effective way to administer intraoperative antibiotics to ensure adequate osseous and soft tissue penetration in patients with complicated osteomyelitis of the foot and ankle. Level of Evidence: III.

On the formation of dendritic iron from alkaline electrochemical reduction of iron oxide prepared for metal fuel applications

Low-temperature electrochemical reduction (electroreduction) of iron oxides is a promising alternative to the conventional methods for iron production due to its CO2-free operation and relatively low energy consumption. In this work, we demonstrate a novel approach for electrochemical iron production by promoting the formation of dendritic structures during iron electrodeposition, which facilitates the easy harvesting of deposits in powder form. Experiments were conducted using a single pair of parallel plate electrodes, immersed in a mixture of hematite (Fe2O3) powder and aqueous alkaline (NaOH) slurry. The effects of current density, Fe2O3 mass fraction, temperature, and powder size on current efficiency and deposit morphology are investigated. A large quantity of dendritic iron structures is observed when experiments are carried out without stirring and/or applying heat from a heating plate. This condition suggests temperature and (ion/species) concentration gradients in the system. The dendrites are mainly deposited on the cathode's sides, corners, and edges. Different deposits and dendritic structures (compact layer deposit, moss-like deposit, deposit with whisker-like dendrites, and deposit with crystal-like dendrites) are observed as operating conditions change. Overall, a cathodic deposition of metallic iron with a high Faradaic efficiency (≥90 %) is successfully accomplished. The present findings provide new insights into the production of electrolytic iron powder and its future use as a carbon neutral and sustainable fuel/energy carrier.

Highly Selective p-Xylene Separation from Mixtures of C8 Aromatics by a Nonporous Molecular Apohost.

High and increasing production of separation of C8 aromatic isomers demands the development of purification methods that are efficient, scalable, and inexpensive, especially for p-xylene, PX, the largest volume C8 commodity. Herein, we report that 4-(1H-1,2,4-triazol-1-yl)-phenyl-1H-benzo[de]isoquinoline-1,3(2H)-dione (TPBD), a molecular compound that can be prepared and scaled up via solid-state synthesis, exhibits exceptional PX selectivity over each of the other C8 isomers, o-xylene (OX), m-xylene (MX), and ethylbenzene (EB). The apohost or α form of TPBD was found to exhibit conformational polymorphism in the solid state enabled by rotation of its triazole and benzene rings. TPBD-αI and TPBD-αII are nonporous polymorphs that transformed to the same PX inclusion compound, TPBD-PX, upon contact with liquid PX. TPBD enabled highly selective capture of PX, as established by competitive slurry experiments involving various molar ratios in binary, ternary, and quaternary mixtures of C8 aromatics. Binary selectivity values for PX as determined by 1H NMR spectroscopy and gas chromatography ranged from 22.4 to 108.4, setting new benchmarks for both PX/MX (70.3) and PX/EB (59.9) selectivity as well as close to benchmark selectivity for PX/OX (108.4). To our knowledge, TPBD is the first material of any class to exhibit such high across-the-board PX selectivity from quaternary mixtures of C8 aromatics under ambient conditions. Crystallographic and computational studies provide structural insight into the PX binding site in TPBD-PX, whereas thermal stability and capture kinetics were determined by variable-temperature powder X-ray diffraction and slurry tests, respectively. That TPBD offers benchmark PX selectivity and facile recyclability makes it a prototypal molecular compound for PX purification or capture under ambient conditions.

Characterization and quality attributes of spray‐dried Kinnow peel powder using maltodextrin and gum arabic

AbstractThe present study was designed to encapsulate Kinnow peel powder (KPP) and study its potential to develop functional food. Kinnow peel powder slurry (KPS) was mixed with maltodextrin (MD) and gum arabic (GA) and spray dried. Encapsulated powders were characterized and compared to freeze‐dried KPP based on feed emulsion (KPS:MD:GA), physical, structural, morphological, and antioxidant properties. The powder sample prepared in the combination of KPS:MD:GA = 85:0:15 represented higher encapsulation efficiency (87.83%), viscosity (79 cP), and surface phenolic content (1.22 mg GAE/g). The powder sample prepared with the combination of KPS:MD:GA = 85:15:0 represented higher total phenolics (12.12 mg GAE/g) and flavonoids (7.93 mg QE/g) content. An increase in the concentration of MD/GA increased the flow behavior and reduced the powder flowability. Hausner ratio (1.284), and Carr index (22.03%) were observed lower for the sample prepared in the combination KPS:MD:GA = 85:15:0. Fourier transform infrared spectroscopy (FTIR) analysis revealed the retention of functional compounds with spray drying. Conclusively, the prepared encapsulated powder can be a functional ingredient for developing different food products, which could valorize Kinnow peel.Practical applicationsThe present study offers a practical method for encapsulating Kinnow peel powder using spray drying, employing maltodextrin and gum arabic. These encapsulates effectively preserve the bioactive compounds or Kinnow peel powder, even those sensitive to heat. The resulting powder can enhance the functional attributes of various food products, including antioxidant activity and anti‐inflammatory properties. Additionally, the powder can significantly improve the taste and texture of food products. Consequently, the prepared encapsulated powder exhibits promising potential as a functional ingredient in developing various food products, adding value to Kinnow peel and promoting sustainable utilization.

Study on the Separation and Sedimentation Performance of Silicon from Diamond Wire Saw Silicon Powder Slurry

Study on the Separation and Sedimentation Performance of Silicon from Diamond Wire Saw Silicon Powder Slurry

Infrared irradiation to drive phosphate condensation as a route to direct additive manufacturing of oxide ceramics

AbstractThis paper introduces a fast, low‐temperature, pressureless process to chemically bind ceramic parts with the help of infrared (IR) irradiation and phosphate binder condensation. Ceramic components are synthesized from slurries of ceramic powders and Al(H2PO4)3 binder that are irradiated with short‐waved IR light capable of heating the system to 350°C. This irradiation is found to be sufficient to drive phosphate condensation, binding the ceramic powders together within a matter of seconds. The IR‐irradiated components show an increase in density and Vickers hardness. Layer‐by‐layer spraying and irradiation is demonstrated as a route to additive manufacturing using various ceramic chemistries. While further optimization is needed to control desired microstructure, this process of using chemically bonded ceramic binders with IR heating for additive manufacturing shows the potential to find applications in various ceramic systems, including refractories, bone implants, electronics, and thermal barrier coatings.

High-Temperature Rheological Properties of Asphalt Mortar Modified with Spent FCC Catalysts

Spent fluid catalytic cracking catalysts (S-FCC-Cs) constitutes a fraction of the hazardous solid waste generated in the petrochemical industry. The resource application of S-FCC-Cs remains a challenge. This study aims to explore utilizing S-FCC-Cs in asphalt mortar as a means to enhance resource utilization. Five different S-FCC catalysts were used as substitutes for mineral powder in the asphalt slurry at varying proportions. The high-temperature rheology of the resulting spent FCC catalyst-modified asphalt slurry was analyzed using temperature scanning tests and multiple stress creep recovery (MSCR) tests conducted at different temperatures and substitution doping levels. As the proportion of alternative doping increased, both the phase angle and irrecoverable creep flexibility decreased, while the absolute values of the rutting factor, deformation recovery rate, and irrecoverable creep flexibility difference increased. Moreover, as the temperature rose, the phase angle increased while the rutting factor decreased. The inclusion of an alternative admixture significantly improved the high-temperature performance of the asphalt mastic. This improvement was attributed to several factors, including the increase in the elastic component, enhanced deformation resistance, and improved deformation recovery. While the high-temperature performance of spent FCC catalyst-modified asphalt mastic gradually declined with increasing test temperature, all performance indices remained superior to those of limestone mineral powder asphalt mastic. In addition, the asphalt mortar modified by S-FCC-C JX with a surface area and hydrophilic coefficient of 105 m2/g and 1.026, respectively, exhibited the best rutting resistance and resilience performances among the five mortars, suggesting that the two factors co-affected the high-temperature rheological properties of S-FCC-C asphalt mortar. Considering stress sensitivity, it is more advantageous in improving the high-temperature deformation resistance of asphalt slurry at the JX dosage of 20%. These research findings offer valuable guidance for the application of S-FCC catalysts in asphalt pavement.

Strength Investigation and Prediction of Superfine Tailings Cemented Paste Backfill Based on Experiments and Intelligent Methods.

The utilization of solid waste for filling mining presents substantial economic and environmental advantages, making it the primary focus of current filling mining technology development. To enhance the mechanical properties of superfine tailings cemented paste backfill (SCPB), this study conducted response surface methodology experiments to investigate the impact of various factors on the strength of SCPB, including the composite cementitious material, consisting of cement and slag powder, and the tailings' grain size. Additionally, various microanalysis techniques were used to investigate the microstructure of SCPB and the development mechanisms of its hydration products. Furthermore, machine learning was utilized to predict the strength of SCPB under multi-factor effects. The findings reveal that the combined effect of slag powder dosage and slurry mass fraction has the most significant influence on strength, while the coupling effect of slurry mass fraction and underflow productivity has the lowest impact on strength. Moreover, SCPB with 20% slag powder has the highest amount of hydration products and the most complete structure. When compared to other commonly used prediction models, the long-short term memory neural network (LSTM) constructed in this study had the highest prediction accuracy for SCPB strength under multi-factor conditions, with root mean square error (RMSE), correlation coefficient (R), and variance account for (VAF) reaching 0.1396, 0.9131, and 81.8747, respectively. By optimizing the LSTM using the sparrow search algorithm (SSA), the RMSE, R, and VAF improved by 88.6%, 9.4%, and 21.9%, respectively. The research results can provide guidance for the efficient filling of superfine tailings.

Fabrication and Experimental Study of Micro/Sub-Micro Porous Copper Coating for Anti-Icing Application.

Micro and sub-micro-spherical copper powder slurries were elaborately prepared to fabricate different types of porous coating surfaces. These surfaces were further treated with low surface energy modification to obtain the superhydrophobic and slippery capacity. The surface wettability and chemical component were measured. The results showed that both the micro and sub-micro porous coating layer greatly increased the water-repellence capability of the substrate compared with the bare copper plate. Notably, the PFDTES-fluorinated coating surfaces yielded superhydrophobic ability against water under 0 °C with a contact angle of ~150° and a contact angle of hysteresis of ~7°. The contact angle results showed that the water repellency of the coating surface deteriorated with decreasing temperature from 10 °C to -20 °C, and the reason was probably recognized as the vapor condensation in the sub-cooled porous layer. The anti-icing test showed that the ice adhesion strengths of the micro and sub-micro-coated surfaces were 38.5 kPa and 30.2 kPa, producing a 62.8% and 72.7% decrease compared to the bare plate. The PFDTES-fluorinated and slippery liquid-infused porous coating surfaces both produced ultra-low ice adhesion strengths of 11.5-15.7 kPa compared with the other non-treated surfaces, which showed prominent properties for anti-icing and deicing requirement of the metallic surface.

Influence of processing parameters on joint characterization of SS 304 using microwave hybrid heating

In this study, the microwave hybrid heating process has been explored to produce optimized joints of stainless steel 304. During the experiment, IFB microwave with a 900W output power and a fixed frequency of 2.45 GHz was employed. Three process parameters: microwave welding time, powder size, and slurry weight have been investigated to see their effects on three major joint properties: tensile strength, micro-hardness and surface temperature. In order to identify the optimum settings for the process parameters to provide the best mechanical qualities for joints, Taguchi L9 was used as the design of the experiment. Microwave welding time is the most significant parameter; followed by powder particle size and slurry weight has little influence on output parameters. More welding time & slurry weight with lower powder particle size produced the best results out of the values chosen as processing parameters. The tensile strength was determined to be 499 MPa. The microhardness of the joint region resulting in a value of 452 Hv. X-ray diffraction images of joint area show the presence of nickel and carbides phases. Microstructure and SEM pictures revealed that the substrate and slurry were properly mixed. The maximum temperature on the surface of the joint was found to be 926.3°C. FESEM images of broken joint showed mixed mode of failure (ductile and brittle).

Ultra-low temperature solid-state synthesis of single-phase SrY2O4 for thermal-barrier-coating applications

Due to the thermal and chemical stability, SrY2O4 has a potential to be utilized as thermal barrier coatings materials. Unfortunately, the relative high synthesis temperature (> 1425 °C) of SrY2O4 leads to high energy consumption limits its industrial production. To address this issue, a novel and easy fabricating approach for single-phased SrY2O4 was explored at ultra-low temperature of 950 °C, in which isopropanol was used to disperse the powder slurry by ball milling. The XRD and high-resolution TEM results demonstrated that the obtained SrY2O4 possesses an anti-spinel orthorhombic crystal structure. In addition, SrY2O4 has good phase stability and high thermal expansion coefficient (11.06 × 10−6 K−1, RT ∼ 1200 °C) at high temperature, which implies that it is a good choice for thermal barrier coatings.

Stencil printing and sintering formation performance of tempered vacuum glazing support pillar

PbO-TiO2-CaO-SiO2-RxOy glass powder slurry was printed on the surface of a tempered glass sheet by stencil and made into support pillars inside the vacuum glazing by sintering method. The molding parameters and microstructure of sintered formed support pillars(SFSP) were measured and observed, and the mechanical properties of SFSP were simulated by ANSYS. The forming results showed that the best forming parameters were obtained for the support pillars at a sintering temperature of 380 °C. The EDS results showed that the diffusion of Pb and Ti elements from the glass powder into the glass flakes occurred during sintering. The SEM results showed that the organizational structure of SFSP became more uniform and dense when the sintering temperature increased from 360 ℃ to 380 ℃. When the sintering temperature continued to increase, lots of crystalline material precipitated in SFSP and even produced holes. The analysis results of XRD showed that the crystal structure of SFSP was mainly composed of Pb0.6875Ca0.3125TiO3, which has the highest crystallinity and content at the sintering temperature of 380 ℃, and the structural strength and denseness of SFSP were good. The simulation results showed no significant difference between SFSP and stainless steel support pillars(SSSP) on the stress and deformation of tempered vacuum glazing(TVG). The SFSP could meet the safety requirement and optimize effects on reducing the stress on the support pillars.

Experimental study and numerical simulation of the influence of ball milling parameters on granule sizes of mold powder

In this study, the ball milling parameters (solids loading, binder and dispersant content, ball milling time) were optimized to control the granule size of the mold powder during spray drying and obtain good mechanical strength and metallurgical properties of the hollow granule mold powder. The effect of ball milling parameters on the granule size of mold powder was systematically investigated using computational fluid dynamics (CFD). A series of parameters, such as the temperature field, velocity field, granule size and trajectory were varied and the moisture content of the slurry in the spray drying tower was computed. To ensure that the granule size of the mold powder is controlled at 0.2–0.6 mm, the following optimum ball milling parameters were chosen based on the results of the numerical simulation: solid loading, 60 wt%; modified sodium carboxymethyl cellulose binder content, 1.0 wt%; sodium tripolyphosphate dispersant content, 0.5 wt%; ball-milling time, 60 min. • Mold powder slurry was prepared, and the viscosity was tested and analyzed. • A numerical simulation method for spray granulation was established. • The temperature and velocity field, moisture content, and diameter distribution were computed. • The optimum ball milling parameters were determined and applied in production.

The enhanced interlaminar toughness of carbon fiber reinforced poly(ether ether ketone) composites modified by carbon nanotubes

• PEEK prepregs were modified with CNTs by a simple powder slurry method. • Laminates directly manufactured by prepregs have enhanced interlaminar toughness. • The G Ic and G IIc with 0.5 wt% CNTs ware improved by 78.8% and 90.5%, respectively. • The flexural properties and interlaminar shear strength were enhanced by CNTs. The interlaminar toughness of poly(ether ether ketone)(PEEK) composites has received extensive attention. In this study, carbon fiber reinforced PEEK prepregs were manufactured by the powder slurry method. Carbon nanotubes(CNTs) were introduced into prepregs during the manufacturing procedure. The double cantilever beam(DCB) and end notched flexure(ENF) specimens were prepared to evaluate the interlaminar fracture toughness of the composites. The results reveal that by the addition of 0.5 wt% CNTs, the mode I and mode II interlaminar fracture toughness of PEEK composites were improved by 78.8% and 90.5%, respectively. The flexural properties and interlaminar shear strength (ILSS) were also enhanced by CNTs. This paper provides a facile method for the direct preparation of high interlaminar toughness prepregs.

Application of a novel grouting material for prereinforcement of shield tunnelling adjacent to existing piles in a soft soil area

During urban subway construction, it is inevitable that shield tunnels will pass under the piles of existing structures or buildings. To minimize the adverse effects of shield tunneling on existing piles and structures, grouting is commonly used to prereinforce the surrounding soil. In this paper, a new grouting material (CSGSA) is proposed for prereinforcement of shield tunneling adjacent to existing piles. CSGSA uses bulk solid waste (i.e., slag powder and desulfurized gypsum) and cement as the main raw materials, and a self-developed activator is added as a catalyst and improves the stability and strength of the grout. The impacts of ingredients and the formulation on the performance of the CSGSA grout were investigated. The optimal formula ratios for the specific gravity of slag powder slurry, cement, gypsum and activator are 1.30 to 1.35, 50%, 25% and 1.5%, and these were determined with a battery of testing methods. The microcosmic mechanism for functioning of the optimal CSGSA was analyzed with XRD and SEM, and the results showed that both a pozzolanic effect and filling effect are observed. The applicability of the CSGSA was validated through a field engineering case involving prereinforcement of shield tunneling adjacent to existing piles in soft soil areas, and the findings indicated that the CSGSA material satisfied the project needs in a low-cost and eco-friendly manner.

Electrochemical trapping of meta-stable NiO consolidated ZnO/PdO by biomimetic provenance for the employment of clean energy generation

Low cost and easily available electro-catalysts are greatly demandable to fulfill energy needs by fabricating the high performance energy generating devices such as fuel cells. In the current work, natural phyto-stabilizing agents have been employed to synthesize nano-structured particles of NiO:ZnO/PdO having higher surface area and superior electrocatalytic properties. Prior to thermal treatment the precipitates of respective metal salts have been appeared because of formation of a complex between metal oxide and extract of phyto-organic material. After calcinations, obtained black colored product of NiO:ZnO/PdO was characterized by spectroscopic techniques including X-ray diffraction (XRD), Mass spectroscopy (GC-MS), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Based on XRD results, Scherer formula was used to calculate crystallite size which was in well agreement with SEM results taken at different magnification confirming synthesis of NiO:ZnO/PdO nanocomposite. The phyto synthesized powder's slurry was casted over Ni and was verified for purpose of electro-catalysis for renewable energy. The fabricated electrode revealed a good deal of improved performance with over-potential value of 0.41V and the Tafel slope of 76 mV/dec. when tested for oxygen evolution reaction (OER). The catalyst has also been tested for Hydrogen evolution reaction (HER) studies and the findings were quite satisfactory. Thus current work provides a way leading to fabrication of low cost metal oxide based electrode material using facile greener synthesis approach.