Hierarchical hybrid of tungsten nitride nanosheets integrated with nitrogen-doped carbon for efficiently electrocatalytical nitrogen fixation

文献类型： 外文期刊

第一作者： Wang, Jing

作者： Wang, Jing;Hui, Liufu;Chen, Jing;Chen, Milin;Huang, Ziyi;Ma, Lin;Wang, Xian;Xi, Yanjie;Gao, Yihan;Wang, Ying;Zhang, Liying;Chen, Jing;Wang, Xian

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关键词： Tungsten nitride; Hierarchical structure; Nitrogen-doped carbon; Nitrogen reduction reaction; Electrocatalyst

期刊名称：INORGANIC CHEMISTRY COMMUNICATIONS （ 影响因子：5.4； 五年影响因子：4.6 ）

ISSN： 1387-7003

年卷期： 2025 年 176 卷

页码：

收录情况： SCI

摘要： Nitrogen reduction reaction (NRR) is currently a promising way to realize large-scale ammonia production. The catalysts are always crucial to accelerating reaction processes and increasing reaction yields. As a class of nonprecious electrocatalysts, transition metal nitrides have drawn intensive attentions because of their metallic electron transport behavior and high chemical stability toward the NRR. Herein, tungsten nitride-nitrogen doped carbon (WN@NC) hierarchical hybrids have been prepared by a facile pyrolytic treatment of tungstatepolydopamine aggregates. The obtained hybrids showcase a hierarchical flower sphere-like morphology and are constructed by tungsten nitride nanosheets coated with N-doped carbon. As a kind of earth-abundant NRR electrocatalyst, the as-prepared WN@NC hybrids demonstrate a distinctly superior electrocatalytical property and selectivity for NRR in comparison to the pure WN. WN@NC is capable of catalyzing the formation of ammonia with a rate of 33.83 mu g mg- cat1 h-1 and a high Faradic efficiency (FE) of 10.59 % at -0.2 V vs RHE in a neutral electrolyte solution. In addition, no hydrazine byproduct could be detected in catalytic process, which manifests a desirable NRR selectivity. The hierarchical porous architecture and effective combination with nitrogen-doped carbon endow WN@NC with enlarged electrochemically active surface area and the reduced electron transfer impedance, thus leading to an excellent electrocatalytic property.

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