Electrocatalytic activity of WB2 electrodes for hydrogen evolution reaction prepared by different methods

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-01-04 DOI:10.1016/j.jeurceramsoc.2025.117185

Shixuan Wang , Yangwei Zhang , Ying Long , Hua-Tay Lin

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引用次数: 0

Abstract

Tungsten diboride (WB₂) exhibits excellent catalytic activity and stability in the hydrogen evolution reaction (HER) of water electrolysis, which are found to be closely related to the processing method of the electrode. In the present work, flake-like WB₂ powder was used to prepare self-supported electrodes through spark plasma sintering (SPS) at 750, 800, and 1600 °C, respectively, as well as cold isostatic pressing (CIP), with the electrode prepared by drop-casting from powder direction. The results showed that, in an acidic medium, the sample sintered at 750 °C exhibited an overpotential of 141.6 mV at 10 mA/cm², with a corresponding Tafel slope of 42.1 mV/dec, which demonstrated a high catalytic activity. In addition, the experimental results showed that the WB₂ particles bonded together to form a porous network structure after SPS low-temperature sintering, resulting in a high density of actively catalytic sites, reduced electron transfer impedance, and exceptional long-term stability.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.