Ferrocene-induced switchable preparation of metal-nonmetal codoped tungsten nitride and carbide nanoarrays for electrocatalytic HER in alkaline and acid media
作者机构：Institute for Advanced Interdisciplinary Research(iAIR)School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China Department of PhysicsUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2023年第16卷第2期
页 面：2085-2093页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
基 金：supported by Shandong Provincial Natural Science Foundation(No.ZR2019BB025) the National Natural Science Foundation of China(Nos.21976014 and U1930402) The Fundamental Research Funds for the Central Universities(FRFTP-20-11B and FRF-BR-20-02B) the generous computer time from TianHe2-JK Supercomputer Center。
主 题：gas–solid reaction tungsten nitride/carbide codoping phase regulation hydrogen evolution
摘 要：Transition metal nitride/carbide(TMN/C)have been actively explored as low-cost hydrogen evolution reaction(HER)electrocatalysts owing to their Pt-like physical and chemical properties.Unfortunately,pure TMN/C suffers from strong hydrogen adsorption and lacks active centers for water dissociation.Herein,we developed a switchable WO_(3)-based in situ gas–solid reaction for preparing sophisticated Fe-N doped WC and Fe-C doped WN nanoarrays.Interestingly,the switch of codoping and phase can be effectively manipulated by regulating the amount of ferrocene.Resultant Fe-C-WN and Fe-N-WC exhibit robust electrocatalytic performance for HER in alkaline and acid electrolytes,respectively.The collective collaboration of morphological,phase and electronic effects are suggested to be responsible for the superior HER activity.The smallest|ΔGH*|value of Fe-NWC indicates preferable hydrogen-evolving kinetics on the Fe-N-WC surface for HER under acid condition,while Fe-C-WN is suggested to be beneficial to the adsorption and dissociation of H_(2)O for HER in alkaline electrolyte.
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