期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 534, 期 -, 页码 55-63出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.09.017
关键词
Co2PONiCo2O4; Overpotantial; Oxides/hydroxides species; Bi-functional electrocatalyst
资金
- National Basic Research Program of China [2014CB931700]
- Fundamental Research Funds for Central Universities [29000-31610004]
- National Natural Science Foundation of China [51702371]
The Co2P@NiCo2O4 bi-functional electrocatalyst was fabricated for hydrogen evolution reaction and oxygen evolution reaction in acidic, neutral and alkaline media. The Co2P@NiCo2O4 in alkaline media exhibites an extremely low overpotential of 170 mV in oxygen evolution to achieve a current density of 10 mA cm(-2) and produces stable water splitting nearly 30 h. The anchored-Co2P can enhance the electrochemical performance of pristine NiCo2O4 as well as increase the tolerance in acidic media of NiCo2O4. Additional, the Co2P is oxidized to oxides/hydroxides species during the electrocatalytic reaction, which acts as the active centers of the electrocatalysis. The Co2P@NiCo2O4 catalyst can be used as an effective bifunctional synergistic center in a wide range of pH values (from 0 to 14). (C) 2018 Elsevier Inc. All rights reserved.
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