化工进展 ›› 2023, Vol. 42 ›› Issue (8): 4275-4282.DOI: 10.16085/j.issn.1000-6613.2022-1846

• 工业催化 • 上一篇    下一篇

化学镀法制备NiCoP/rGO/NF高效电解水析氢催化剂

张亚娟1,2(), 徐惠1(), 胡贝1, 史星伟2   

  1. 1.兰州理工大学石油化工学院,甘肃 兰州 730000
    2.中国科学院过程工程研究所,离子液体清洁过程北京市 重点实验室,北京 100190
  • 收稿日期:2022-10-08 修回日期:2022-12-13 出版日期:2023-08-15 发布日期:2023-09-19
  • 通讯作者: 徐惠
  • 作者简介:张亚娟(1992—),女,博士研究生,研究方向为电催化。E-mail:zyj200389@126.com
  • 基金资助:
    国家自然科学基金(52163025);甘肃省优秀研究生“创新之星”项目

Preparation of NiCoP/rGO/NF electrocatalyst by eletroless plating for efficient hydrogen evolution reaction

ZHANG Yajuan1,2(), XU Hui1(), HU Bei1, SHI Xingwei2   

  1. 1.School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730000, Gansu, China
    2.Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2022-10-08 Revised:2022-12-13 Online:2023-08-15 Published:2023-09-19
  • Contact: XU Hui

摘要:

电解水制氢是一项制取绿色氢能的重要技术,而开发具有低成本、高活性的催化剂作为电极材料是当前的研究重点。本文以负载石墨烯的泡沫镍(rGO/NF)为基底,应用化学镀法制备了NiCoP/rGO/NF新型析氢(HER)电解水催化剂。比较NiCoP/NF和引入石墨烯后的NiCoP/rGO/NF的电催化性能。三电极体系的测试结果表明,在1mol/L KOH电解液中,在电流密度为10mA/cm2时,NiCoP/rGO/NF电极具有最优的过电位98mV。塔菲尔斜率(Tafel)、循环伏安(CV)和电化学阻抗(EIS)分析表明,NiCoP/rGO/NF电极优异的HER性能是快速反应动力学、高效电化学活性比表面积(ECSA)和小反应电阻(Rct)综合作用的结果。结构测试表明:NiCoP均匀沉积于rGO和泡沫镍表面,并且rGO形成的三维网络结构增加了催化剂比表面积,暴露出丰富的活性边缘,催化剂中Ni—P/Co—P键的形成是HER性能提升的关键。

关键词: 电化学, 制氢, 催化剂, 化学镀, 过渡金属磷化物, 三维石墨烯

Abstract:

Electrochemical water splitting is an important green hydrogen technology. The development of efficient and cost-effective electrocatalyst is the focus of current research. A novel hydrogen evolution reaction (HER) electrocatalyst NiCoP/rGO/NF was constructed by electroless plating on nickel foam substrate that was loaded with three-dimensional reduced graphene oxide (rGO). The electrocatalysis performance of NiCoP/NF and that with the introduction of rGO (NiCoP/rGO/NF) was compared. The test results of the three-electrode system showed that, in 1mol/L KOH electrolyte and under the current density of 10mA/cm2, the NiCoP/rGO/NF electrode gave the highest overpotential of 98mV. The remarkable performance of NiCoP/rGO/NF electrode in HER might be the comprehensive result of fast reaction kinetics, large electrochemical active specific surface area (ECSA) and small reaction resistance (Rct) as indicated by the Tafel, cyclic voltammetry (CV) and impedance (EIS) analysis. The structure characterization confirmed that NiCoP was deposited uniformly on the surface of rGO and NF, and the three-dimensional network structure formed by rGO increased the catalyst surface area and exposed rich active edges. The formation of the Ni—P/Co—P bond in NiCoP/rGO/NF was key of HER performance improvement.

Key words: electrochemistry, hydrogen production, catalyst, electroless plating, transition metal phosphide, three-dimensional graphene

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