期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 27, 期 1, 页码 238-241出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202004225
关键词
carbon cloth; CuCo2S4; Fe2O3; electron transfer; ion transport; oxygen evolution reaction
资金
- National Natural Science Foundation of China [61774033]
- Natural Science Foundation of Jiangsu Province in China [BK20170661]
The structure of CuCo2S4/Fe2O3/CC effectively reduced the resistance of electron transfer and ion transport, leading to a significantly larger electrochemical surface area compared to CuCo2S4/CC. This improved design achieved an overpotential of 273 mV and a Tafel slope of 67 mV dec(-1) for the oxygen evolution reaction in alkaline solution.
The behavior of electron transfer and ion transport plays a significant role in the electrocatalytic activity. However, the improvement of CuCo2S4 electrocatalytic activity has been a difficult problem owing to lack of effective electron transfer and ion transport. Herein, the unique structure connected CuCo2S4 nanosheets and carbon cloth (CC) with Fe2O3 nanoparticles to form CuCo2S4/Fe2O3/CC. Compared with CuCo2S4/CC, the resistances of electron transfer and ion transport were decreased by 65 and 84 %, respectively. The electrochemical surface area of CuCo2S4/Fe2O3/CC was 2.76 times larger than that of CuCo2S4/CC due to the high double-layer capacitance. For the oxygen evolution reaction, CuCo2S4/Fe2O3/CC could achieve an overpotential of 273 mV and a Tafel slope of 67 mV dec(-1) in alkaline solution.
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