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Enhanced Electron Transfer and Ion Transport by Binary and Multidimensional CuCo2 S4 /Fe2 O3 on Carbon Cloth for
Minglong Lu1, Xiaoyun Zhang1, Jiwei Tong1
1School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, P. R. China.
Abstract:
The behavior of electron transfer and ion transport plays a significant role in the electrocatalytic activity. However, the improvement of CuCo2 S4 electrocatalytic activity has been a difficult problem owing to lack of effective electron transfer and ion transport. Herein, the unique structure connected CuCo2 S4 nanosheets and carbon cloth (CC) with Fe2 O3 nanoparticles to form CuCo2 S4 /Fe2 O3 /CC. Compared with CuCo2 S4 /CC, the resistances of electron transfer and ion transport were decreased by 65 and 84 %, respectively. The electrochemical surface area of CuCo2 S4 /Fe2 O3 /CC was 2.76 times larger than that of CuCo2 S4 /CC due to the high double-layer capacitance. For the oxygen evolution reaction, CuCo2 S4 /Fe2 O3 /CC could achieve an overpotential of 273 mV and a Tafel slope of 67 mV dec-1 in alkaline solution.
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