Chinese Journal of Catalysis ›› 2024, Vol. 56: 139-149.DOI: 10.1016/S1872-2067(23)64565-6

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Promoting electrocatalytic oxidation of methanol to formate through interfacial interaction in NiMo oxide-CoMo oxide mixture-derived catalysts

Yanbin Qia,b, Yihua Zhub, Hongliang Jianga,*(), Chunzhong Lia,b,*()   

  1. aKey Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
    bShanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2023-09-28 Accepted:2023-11-14 Online:2024-01-18 Published:2024-01-10
  • Contact: *E-mail: jhlworld@ecust.edu.cn (H. Jiang), czli@ecust.edu.cn (C. Li).
  • Supported by:
    National Key R&D Program(2022YFB3808400);National Natural Science Foundation of China(22222804);National Natural Science Foundation of China(U22B20143);Science and Technology Commission of Shanghai Municipality(22dz1205900);Shanghai Municipal Science and Technology Major Project.

Abstract:

Designing efficient, stable, and easily scaled-up catalysts for nucleophile oxidation reactions (NOR) is a key step in promoting the industrial application of NOR. Here, a simple physical mixing strategy is adopted to prepare a mixture of NiMo oxide and CoMo oxide as catalyst for methanol electrocatalytic oxidation reaction (MOR). The mixture exhibits high catalytic activity for MOR and its performance far exceeds that of a single component. The interaction at the contact interface between nickel and cobalt components is clarified through operando electrochemical impedance spectroscopy, in-situ Raman spectroscopy, and a series of electrochemical tests. The interfacial interaction enhances the charge transport and promotes the formation of electrophilic OH* species, which significantly boosts the methanol oxidation reaction. This work provides a new idea for the design of efficient and easily scaled-up catalysts for nucleophile oxidation reactions.

Key words: Nucleophile oxidation reaction, Electrocatalysis, Methanol electrocatalytic oxidation, Large-scale preparation, Interfacial interaction