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Carbon black that is introduced into Co3O4 will reduce the overpotential of the oxygen evolution reaction. By adding Au, the Co3O4/C catalyst exhibits superior electrochemical activity and excellent stability for the oxygen evolution reaction. The catalyst with a weight ratio of Au to Co3O4 of 1:3 gives the best performance. After loading with Au, the binding energy value of Co 2p has a positive shift, which will increase formation of CoIV cations of the active centers.

Structures, magnetism and electrocatalytic oxygen evolution for four dinuclear, 1D and 3D complexes based on transition metals were reported.

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