Superaerophobic WC-Mo2C Ceramic Electrode with MoWC2/Mo2C Heterostructure for Hydrogen Evolution Reaction at High Current Density

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-05-22 DOI:10.1021/acsmaterialslett.5c0055210.1021/acsmaterialslett.5c00552

Anding Huang, Haisen Huang, Sishi Huang, Chuntian Tan, Yang Yang, Jiahao Li, Luyuan Hao, Feihong Wang*, Xin Xu* and Simeon Agathopoulos,

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Abstract

The production of highly efficient, stable, robust, and low-cost electrodes for the hydrogen evolution reaction (HER) is crucially important in renewable energy technologies. This article presents the production of a porous composite ceramic with a formula of 80 wt % WC–20 wt % Mo₂C, with a structure of an oriented asymmetric finger-like hole. Its high catalytic activity was experimentally confirmed, attributed to the in situ MoWC₂/Mo₂C heterostructure during sintering. What’s more, the produced electrode exhibits both high aerophobicity and high hydrophilicity. The overpotentials of the electrode of 1500 mA·cm^–2 in 0.5 M H₂SO₄ and 1.0 M KOH were 352 and 276 mV, respectively, better than those of the Pt-wire electrode. The chronopotentiometry curves of 10–1500 mA·cm^–2 confirmed its long-term stability. Density functional theory (DFT) calculations suggested that the MoWC₂/Mo₂C heterostructure could regulate the electronic structure, with appropriate hydrogen adsorption energy in acidic media and minimal water dissociation potential in alkaline media.

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具有MoWC2/Mo2C异质结构的超疏氧WC-Mo2C陶瓷电极用于高电流密度下析氢反应

生产高效、稳定、坚固、低成本的析氢反应电极在可再生能源技术中至关重要。本文介绍了一种多孔复合陶瓷的制备方法，其配方为80 wt % WC-20 wt % Mo2C，具有定向不对称指状孔结构。实验证实了其高催化活性，这归因于烧结过程中原位MoWC2/Mo2C异质结构。制备的电极具有较高的疏氧性和亲水性。在0.5 M H2SO4和1.0 M KOH中，1500 mA·cm-2电极的过电位分别为352和276 mV，优于pt线电极。10 ~ 1500 mA·cm-2的时电位曲线证实了其长期稳定性。密度泛函理论（DFT）计算表明，MoWC2/Mo2C异质结构可以调节电子结构，在酸性介质中具有合适的氢吸附能，在碱性介质中具有最小的水解离电位。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.