高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (8): 2483.doi: 10.7503/cjcu20210218

• 物理化学 • 上一篇    下一篇

锌掺杂NiCoP多孔双层阵列电极材料的制备及电催化产氢性能

武亚强1, 刘思明1, 金顺敬2, 严永情1, 王朝1(), 陈丽华1, 苏宝连1,3()   

  1. 1.武汉理工大学材料复合新技术国家重点实验室, 武汉 430070
    2.襄阳职业技术学院, 襄阳 441050
    3.那慕尔大学无机材料化学实验室, 那慕尔 B?5000, 比利时
  • 收稿日期:2021-03-31 出版日期:2021-08-10 发布日期:2021-08-05
  • 通讯作者: 王朝 E-mail:zhao.wang@whut.edu.cn;bao-lian.su@unamur.be
  • 作者简介:苏宝连, 男, 博士, 教授, 主要从事仿生等级孔及生命复合材料方面的研究. E-mail: bao-lian.su@unamur.be
  • 基金资助:
    国家自然科学基金(21902122);中国博士后科学基金(2019M652723)

Synthesis of Zn-Doped NiCoP Catalyst with Porous Double-layer Nanoarray Structure and Its Electrocatalytic Properties for Hydrogen Evolution

WU Yaqiang1, LIU Siming1, JIN Shunjin2, YAN Yongqing1, WANG Zhao1(), CHEN Lihua1, SU Baolian1,3()   

  1. 1.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China
    2.Xiangyang Polytechnic,Xiangyang 441050,China
    3.Laboratory of Inorganic Materials Chemistry(CMI),University of Namur,Namur B? 5000,Belgium
  • Received:2021-03-31 Online:2021-08-10 Published:2021-08-05
  • Contact: WANG Zhao E-mail:zhao.wang@whut.edu.cn;bao-lian.su@unamur.be
  • Supported by:
    the National Natural Science Foundation of China(21902122);the Postdoctoral Science Foundation of China(2019M652723)

摘要:

通过水热、 原位磷化及HCl选择性刻蚀的方式构建了一种在泡沫镍上生长的新型Zn掺杂NiCoP多孔双层阵列结构, 与传统的单层阵列相比, 顶层纳米叶片阵列在泡沫镍载体上的底层纳米线阵列上均匀生长, 最大限度地暴露出催化的活性位点, 提供了较大的电解液接触面积. 多孔等级结构也加速了氢气泡的释放. 结果表明, 优化后的多孔H-Zn-NiCo-P催化剂在碱性电解液(1 mol/L KOH)中展现出优异的电解水产氢性能. 该材料驱动电流密度10和100 mA/cm2所需要的过电位仅为59和156 mV, Tafel斜率为66 mV/dec, 且表现出良好的电化学稳定性.

关键词: 双层阵列, 多孔结构, 电催化剂, 锌掺杂, 析氢反应

Abstract:

NiCoP is wildly accepted as one of the most potential catalysts for electrocatalytic hydrogen evolution reaction(HER) due to its high catalytic efficiency and low cost. However, the hydrogen bubble formation over catalyst surface during HER largely decreases the catalytic active sites and slows the mass transportation of electrolyte, resulting in a limited catalytic performance. In this paper, Zn-doped NiCoP catalyst with porous double-layer array structure on foam nickel was constructed by hydrothermal, followed with in?situ phospha?ting and HCl selective etching. Compared with the traditional single-layer array, the top nanoleaves array distributes uniformly on the bottom nanowires array, which maximizes the exposed catalytic active sites and provides a larger contact area for electrolyte. Moreover, the porous hierarchy also accelerates hydrogen bubble’s release. As a result, the optimized H-Zn-NiCo-P shows high electrocatalytic activity in alkaline electrolyte (1 mol/L KOH), with overpotentials of 59 and 156 mV at the current densities of 10 and 100 mA/cm2, respectively. The Tafel slope is 66 mV/dec and it shows excellent electrochemical stability. This research provides new ideas and solutions for the development of electrocatalysts with novel array structure.

Key words: Double-layer array, Porous structure, Electrocatalyst, Zn doping, Hydrogen evolution reaction

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