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        Nest-like Ag-doped NiMoO4/NF with rich oxygen vacancies as robust catalysts for highly efficient oxygen evolution

        Jianzhi Wang,Yu Luo,Tong Xu,Ziyi Guo,Guopeng Chen,Yuchen Ren,Yanan Xue,Ning Cai,Hui Li,Faquan Yu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-

        The development of low-cost and highly efficient electrocatalysts for oxygen evolution reaction (OER)with good conductivity, high specific surface area and abundant oxygen vacancies is of great significancefor the future renewable energy conversion and storage system. Herein, Ag doped NiMoO4 materials onthe Ni foam (NiMoO4/Ag/NF) with rich oxygen vacancies were successfully prepared by hydrothermalstrategy and layer by layer assembly method. The Ag ions are doped in-situ to promote electron transferand compensate for the poor conductivity of metal oxides. The suitable air annealing treatment is used tocreate rich oxygen vacancies. The high specific surface area and one-dimensional characteristics of thecross mesoporous nanorod skeleton are responsible for the increased exposure of active centers andthe rapid charge transfer behavior. The NiMoO4/Ag/NF exhibits high activity for OER in alkaline solution(an overpotential of 275 mV at the current density of 20 mA cm2) and low Tafel slope (53.67 mV dec1),and a satisfying durability in 1.0 M KOH. This study provides an effective method for the preparation ofAg doped one-dimensional nanomaterials with excellent OER catalytic performance and electrochemicalstability.

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