One-dimensional MoO-CoMoO@C nanorods were synthesized by using MoO@ZIF-67 composites as a precursor for the first time, and it is found that the CoMoO species and its composite have excellent OER activities. The MoO-CoMoO@C nanorods present favorable electrocatalytic advantages toward OER in alkaline solution, requiring an overpotential of only 320 mV to deliver a current density of 10 mA cm. In addition, the catalyst also shows a small Tafel slope of 88 mV dec and relatively good durability. The attractive OER performance can be attributed to the highly active CoMoO and MoO species and the unique structure of the catalyst. This strategy can be extended to design and synthesize other novel and highly efficient molybdenum based ternary metal oxides as OER catalysts.

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