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https://doi.org/10.1016/j.electacta.2017.10.011
Copy DOIJournal: Electrochimica Acta | Publication Date: Oct 12, 2017 |
Citations: 43 |
Developing high efficiency electrocatalysts for electrocatalytic oxygen evolution reaction (OER) is a key to water splitting. In this work, we demonstrate the preparation of CoO@FeOOH core-shell nanowire (NWs) grown on three-dimensional (3D) carbon cloth (CC@CoO@FeOOH-NWAs) by hydrothermal method followed by electrodeposition process as well as its highly efficient activity for water oxidation. In this hybrid structure, CoO@FeOOH-NWs with an average diameter of 100nm is vertically grown on the surface of carbon fibers of the carbon cloth. The combination of CoO@FeOOH catalyst with good electron transfer substrate exhibits exceptionally good electrocatalytic activity and long-term durability towards oxygen evolution reaction in alkaline solution. It needs an overpotential as low as 255mV to achieve the current density of 10mAcm−2, with a Tafel slope of 82mVdec−1 and also exhibits a good stability in 20h. In addition, the nanowire array structure is well retained after the durability test with high current density of 50mAcm−2. Our strategy provides a guide to rational design of micro-structures of the materials to achieve their high performance.
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