Bifunctional Ni4MoW PMEC electrocatalyst for efficient overall water splitting

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2025-03-20 DOI:10.1016/j.apt.2025.104839

Qiankun Zhang , Can Zhang , Yifeng Xiao , Minghan Li , Jiaoyan Liu , Zhi Meng , Yuxin He , Jinwen Qian , Haihong Zhang , Liuke Deng , Yuehui He , Guangyao Yang , Zhi He , Liang Wu

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引用次数: 0

Abstract

The pursuit of low-cost, facilely synthesized, and highly efficient non-noble metal electrocatalysts for water splitting has gained momentum. This paper reports the preparation of porous monolithic electrocatalysts (PMECs) consisting of Ni₄MoW PMEC ternary alloys with non-noble transition metals using the powder metallurgy method. The electrodes have excellent Hydrogen Evolution Reaction (HER) and Oxygen Evolution Reaction (OER) activity in concentrated alkaline electrolytes, showing an exceptional overpotential for the HER at 96 mV at 10 mA cm⁻² and the OER at 209 mV at 100 mA cm⁻². The porous electrode demonstrated excellent stability for the Hydrogen Evolution Reaction (HER) at a high current density of 500 mA·cm^-2 and exhibited outstanding performance for the Oxygen Evolution Reaction (OER) at a high current density of 100 mA·cm^-2. Furthermore, when the Ni₄MoW PMEC was employed as both the anode and cathode, the potential fluctuation was observed to be less than 100 mV at a high current density of 100 mA cm^-2 over a duration of 100 h. This stability indicates the robustness of the electrode material under high-current conditions, which is critical for practical applications in water-splitting devices. This research provides a new reference for the design of efficient and low-cost porous monolithic catalysts, which holds great potential for industrial applications.

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)