Promoting electrocatalytic oxidation of methanol to formate through interfacial interaction in NiMo oxide-CoMo oxide mixture-derived catalysts
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 electrocata-lytic oxidation reaction(MOR).The mixture exhibits high catalytic activity for MOR and its perfor-mance far exceeds that of a single component.The interaction at the contact interface between nickel and cobalt components is clarified through operando electrochemical impedance spectros-copy,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.
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