Optimizing surface structure with Cu nanodots-decorated NiMoO4 nanostructures to enhance electrocatalytic water splitting

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 119, P. 82 - 94

Published: March 21, 2025

Language: Английский

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Phosphorus–nitrogen Co-doped 3D RuCo spheres on activated carbon cloth with enhanced electrocatalytic activity for hydrogen and oxygen evolution reactions

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 122, P. 270 - 278

Published: April 1, 2025

Language: Английский

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Interface Engineering Induced by Low Ru Doping in Ni/Co@NC Derived from Ni-ZIF-67 for Enhanced Electrocatalytic Overall Water Splitting

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(44), P. 60310 - 60320

Published: Oct. 23, 2024

Electrochemical water splitting is a promising approach for hydrogen evolution reactions (HER); however, the oxygen reaction (OER) remains major bottleneck due to its high energy requirements. High-performance electrocatalysts capable of facilitating HER, OER, and overall (OWS) are highly needed improve OER kinetics. In this work, we synthesized trimetallic heterostructure Ru, Ni, Co incorporated into N-doped carbon (denoted as Ru/Ni/Co@NC) by first synthesizing Ni/Co@NC from Ni-ZIF-67 polyhedrons via high-temperature carbonization, followed Ru doping using galvanic replacement method. Benefiting increased active surface sites, modulated electronic structure, enhanced interfacial synergistic effects, Ru/Ni/Co@NC exhibited exceptional electrocatalytic performance both HER processes. The optimized catalyst, with minimal mass ratio ∼2.07%, demonstrated significantly low overpotential values 34 mV 174 at current density 10 mA/cm2 corresponding Tafel slope 33.42 34.39 mV/dec, respectively. Further, catalyst was loaded onto paper used anode cathode materials alkaline splitting. Interestingly, cell voltage just 1.44 V obtained. electrolytic further elaborated functional theory (DFT) calculations, which confirmed that in Ni/Co introduced additional sites H*, enhancing adsorption/desorption abilities (ΔGH* = -0.30 eV), lowering dissociation barrier (ΔGb 0.49 eV) reducing rate-determining step (O* → OOH*) 1.62 eV an environment. These findings reflect significant potential ZIF-67-based catalysts conversion storage applications.

Language: Английский

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Enhanced hydrogen evolution ability of Ru with regulation of interface electronic structure by WC/W2C heterostructure via ultrafast flash joule heating synthesis

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163015 - 163015

Published: March 1, 2025

Language: Английский

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Synergistic Effect of NiMoO₄ Nanorods with Polyaniline for Efficient Electrochemical Water Splitting

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(19), P. 28199 - 28210

Published: April 29, 2025

Electrochemical water splitting has emerged as a promising solution for sustainable hydrogen production, but the development of efficient, durable, and cost-effective bifunctional electrocatalysts remains critical challenge. In this work, we report novel fabrication composite materials consisting nickel molybdate (NiMoO4) coated with polyaniline (PANI). NiMoO4 nanorods were initially synthesized on foam (NF) using hydrothermal technique subsequently PANI via UV-assisted polymerization. The resulting NiMoO4@PANI nanostructures demonstrate increased active sites improved efficiency in electron transfer catalytic activity. This combination enhanced evolution reaction (HER) oxygen (OER) performance, achieving reduced overpotential values 88 167 mV HER OER at 10 mA cm-2, respectively. Comprehensive electrochemical evaluations, including Tafel slope, impedance spectroscopy (EIS), double-layer capacitance (Cdl) measurements, validate enhancements kinetics charge facilitated by coating. Density functional theory (DFT) calculations offer further insights into efficiency, showing barrier (ΔGb = 0.45 eV), nearly negligible adsorption energy (ΔG*H 0.08 appropriate (ΔG*OOH - ΔG*OH 2.58 high density states close to Fermi level. exhibit excellent stability 310 h without interruption, suggesting potential production.

Language: Английский

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Ameliorated energy storage and oxygen evolution catalysis activities of in-situ grown Mn-doped NiMoO4⋅xH2O micro-rods

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 133, P. 235 - 246

Published: May 2, 2025

Language: Английский

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Room-temperature co-precipitation of nickel phosphate-coated Zn0.4Cd0.6S nanorods for enhanced photocatalytic H₂ evolution in water splitting

Molecular Catalysis, Journal Year: 2025, Volume and Issue: 582, P. 115199 - 115199

Published: May 6, 2025

Language: Английский

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Oxygen vacancies engineering in iron-doped nickel molybdate nanorods to accelerate electron transfer for rapid organic pollutants removal

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 133391 - 133391

Published: May 1, 2025

Language: Английский

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Spatially separated redox active sites over Re-Ni@Ni(OH)2 core-shell structure for enhancing furfural oxidation coupled with hydrogen evolution

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157270 - 157270

Published: Oct. 1, 2024

Language: Английский

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