Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (6): 1478-1484.DOI: 10.1016/S1872-2067(21)63995-5

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Copper-doped nickel oxyhydroxide for efficient electrocatalytic ethanol oxidation

Huining Wanga, Anxiang Guana, Junbo Zhanga, Yuying Mia, Si Lia, Taotao Yuanb, Chao Jingb, Lijuan Zhanga,*(), Linjuan Zhangb,$(), Gengfeng Zhenga,#()   

  1. aLaboratory of Advanced Materials, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Faculty of Chemistry and Materials Science, Fudan University, Shanghai 200438, China
    bKey Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2021-11-13 Accepted:2021-11-13 Online:2022-06-18 Published:2022-04-14
  • Contact: Lijuan Zhang, Linjuan Zhang, Gengfeng Zheng
  • Supported by:
    National Key Research and Development Program of China(2018YFA0209401);National Key Research and Development Program of China(2017YFA0206901);National Natural Science Foundation of China(22025502);National Natural Science Foundation of China(21975051);National Natural Science Foundation of China(21773036);Science and Technology Commission of Shanghai Municipality(21DZ1206800);Science and Technology Commission of Shanghai Municipality(19XD1420400);Shanghai Municipal Education Commission(2019-01-07-00-07-E00045);“Transformational Technologies for Clean Energy and Demonstration,” Strategic Priority Research Program of the Chinese Academy of Sciences(XDA2100000);K. C. Wong Education Foundation(GJTD-2018-10);Youth Innovation Promotion Association, Chinese Academy of Science(Y201842);Instrument and Equipment Development Program Chinese Academy of Science(YJKYYQ20180066);DNL Cooperation Fund, CAS(DNL202008)

Abstract:

Rational design of low-cost and efficient electrocatalysts for ethanol oxidation reaction (EOR) is imperative for electrocatalytic ethanol fuel cells. In this work, we developed a copper-doped nickel oxyhydroxide (Cu-doped NiOOH) catalyst via in situ electrochemical reconstruction of a NiCu alloy. The introduction of Cu dopants increases the specific surface area and more defect sites, as well as forms high-valence Ni sites. The Cu-doped NiOOH electrocatalyst exhibited an excellent EOR performance with a peak current density of 227 mA·cm -2 at 1.72 V versus reversible hydrogen electrode, high Faradic efficiencies for acetate production (> 98%), and excellent electrochemical stability. Our work suggests an attractive route of designing non-noble metal based electrocatalysts for ethanol oxidation.

Key words: Ethanol oxidation reaction, Electrocatalyst, Cu doping, Nickel oxyhydroxide, Acetate