能源化学(英文版)

能源化学(英文) ›› 2019, Vol. 28 ›› Issue (2): 111-115.DOI: 10.1016/j.jechem.2018.02.011

• Preface • 上一篇    下一篇

Ni(OH)2-Ni/C for hydrogen oxidation reaction in alkaline media

Yangxin Pan, Gaohe Hu, Juntao Lu, Li Xiao, Lin Zhuang   

  1. College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan 430072, Hubei, China
  • 收稿日期:2018-01-23 修回日期:2018-02-12 出版日期:2019-02-15 发布日期:2019-02-15
  • 通讯作者: Li Xiao, Lin Zhuang
  • 基金资助:

    This work was supported by the National Natural Science Foundation of China (21573167, 21633008, 91545205), the Innovative Research Team in Wuhan University (2042017kf0232), the National Key Research and Development Program (2016YFB0101203), the Fundamental Research Funds for the Central Universities (2014203020207).

Ni(OH)2-Ni/C for hydrogen oxidation reaction in alkaline media

Yangxin Pan, Gaohe Hu, Juntao Lu, Li Xiao, Lin Zhuang   

  1. College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan 430072, Hubei, China
  • Received:2018-01-23 Revised:2018-02-12 Online:2019-02-15 Published:2019-02-15
  • Contact: Li Xiao, Lin Zhuang
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21573167, 21633008, 91545205), the Innovative Research Team in Wuhan University (2042017kf0232), the National Key Research and Development Program (2016YFB0101203), the Fundamental Research Funds for the Central Universities (2014203020207).

摘要： The development of the hydrogen electrode is vital for the application of alkaline polymer electrolyte fuel cells (APEFCs). In this study, a series of Ni(OH)2 decorated Ni/C catalysts (Ni(OH)2-Ni/C) were prepared by a three-step electrochemical treatment of Ni/C. The existence of Ni(OH)2 was demonstrated by X-ray photoelectron spectroscopy (XPS), and the surface molar ratio of Ni(OH)2/Ni of the samples was estimated via an electrochemical method. The HOR catalytic activity of the catalysts was evaluated by a rotation disk electrode (RDE) method, and a "volcano plot" was established between the HOR exchange current (j0) and the surface molar ratio of Ni(OH)2/Ni. On top of the "volcano", the surface molar ratio of Ni(OH)2/Ni is 1.1:1, the j0 of which was 6.8 times of that of Ni/C. The stability of the samples toward HOR was evaluated to be good. Our study added a systematic experimental evidence to the HOR research, showing that the HOR catalytic activity of Ni can be deliberately controlled via decoration of Ni(OH)2, which may help understanding the HOR mechanism on Ni.

关键词: Hydrogen oxidation reaction, Fuel cells, Alkaline polymer electrolyte fuel cells, Nickel, Volcano plot

Abstract: The development of the hydrogen electrode is vital for the application of alkaline polymer electrolyte fuel cells (APEFCs). In this study, a series of Ni(OH)2 decorated Ni/C catalysts (Ni(OH)2-Ni/C) were prepared by a three-step electrochemical treatment of Ni/C. The existence of Ni(OH)2 was demonstrated by X-ray photoelectron spectroscopy (XPS), and the surface molar ratio of Ni(OH)2/Ni of the samples was estimated via an electrochemical method. The HOR catalytic activity of the catalysts was evaluated by a rotation disk electrode (RDE) method, and a "volcano plot" was established between the HOR exchange current (j0) and the surface molar ratio of Ni(OH)2/Ni. On top of the "volcano", the surface molar ratio of Ni(OH)2/Ni is 1.1:1, the j0 of which was 6.8 times of that of Ni/C. The stability of the samples toward HOR was evaluated to be good. Our study added a systematic experimental evidence to the HOR research, showing that the HOR catalytic activity of Ni can be deliberately controlled via decoration of Ni(OH)2, which may help understanding the HOR mechanism on Ni.

Key words: Hydrogen oxidation reaction, Fuel cells, Alkaline polymer electrolyte fuel cells, Nickel, Volcano plot