Ni掺杂Mo2C/C双功能催化剂的制备及其电解水性能的研究

doi:10.16553/j.cnki.issn1000-985x.20241025.001

摘要/Abstract

摘要： 随着全球环境问题的日益突出,化石燃料的日益枯竭,寻找可再生能源成为了一项艰巨的任务。电解水制氢通过析氢反应(HER)和析氧反应(OER)同时产生氢气和氧气,是一种高效、绿色的制氢方法,吸引了越来越多的科研人员的兴趣。但是,目前商用贵金属催化剂(Pt/C和RuO₂/IrO₂)价格贵且储量少,因此,开发具有高性能、低成本、高稳定性的非贵金属电催化剂成为了研究热点。本文通过简单的盐模板热解法成功制备了具有三维(3D)纳米片结构的Ni@Mo₂C/C催化剂。通过X射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对Ni@Mo₂C/C的组成、形貌及结构进行了表征,通过X射线光电子衍射仪(XPS)对元素组成及元素价态进行了分析,并考察了Ni@Mo₂C/C的电化学性能。结果表明,在电流密度为10 mA·cm^-2时,Ni@Mo₂C/C催化剂的HER和OER的过电位分别为47和232 mV。在全解水测试中,仅需要1.61 V即可驱动10 mA·cm^-2的电流密度,且可持续稳定工作100 h。

关键词: Mo₂C, Ni掺杂, 析氢反应, 析氧反应, 全解水, 双功能催化剂

Abstract: With the increasing prominent global environmental issues and the depletion of fossil fuels, the search for renewable energy has become a daunting task. Hydrogen production by water electrolysis, which simultaneously generates hydrogen and oxygen through the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), is an efficient and green hydrogen production method, attracting the interest of an increasing number of researchers. However, currently commercial noble metal catalysts (Pt/C and RuO₂/IrO₂) are expensive and have limited reserves. Therefore, the development of high-performance, low-cost, and highly stable non-noble metal electrocatalysts has become a research hotspot. In this paper, a Ni@Mo₂C/C catalyst with three dimensions (3D) nanosheet structures was successfully prepared via a simple salt-template pyrolysis method. The composition, morphology and structure of Ni@Mo₂C/C material were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The elemental composition and valence states were analyzed using X-ray photoelectron spectroscopy (XPS), and the electrochemical performance of Ni@Mo₂C/C was investigated. The results indicate that at a current density of 10 mA·cm^-2, the overpotentials for the HER and OER of the Ni@Mo₂C/C catalyst are 47 and 232 mV, respectively. In the overall water splitting test, a voltage of only 1.61 V was sufficient to drive a current density of 10 mA·cm^-2, which could be sustained for 100 h.

Key words: Mo₂C, Ni doping, hydrogen evolution reaction, oxygen evolution reaction, overall water splitting, bifunctional catalyst

中图分类号:

陈鸿明, 范胜琪, 宋琪, 蒋玲, 陈拥军, 李建保, 张雪艳. Ni掺杂Mo₂C/C双功能催化剂的制备及其电解水性能的研究[J]. 人工晶体学报, 2025, 54(1): 158-164.

CHEN Hongming, FAN Shengqi, SONG Qi, JIANG Ling, CHEN Yongjun, LI Jianbao, ZHANG Xueyan. Preparation of Ni-Doped Mo₂C/C Bifunctional Catalysts and Their Performance in Electrolytic Water Splitting[J]. Journal of Synthetic Crystals, 2025, 54(1): 158-164.

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Ni掺杂Mo₂C/C双功能催化剂的制备及其电解水性能的研究

Preparation of Ni-Doped Mo₂C/C Bifunctional Catalysts and Their Performance in Electrolytic Water Splitting

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