期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 26, 期 58, 页码 13305-13310出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202003185
关键词
Ce doping; mesoporous structures; oxygen evolution reactions; transition metal phosphides
资金
- National Natural Science Foundation of China [51871078]
- Heilongjiang Science Foundation [E2018028]
Controllable synthesis and rational design of ordered nanostructures are crucial for their renewable energy applications. In this work, a mesoporous CoP/Fe2P doped with 5 % Ce by a simple nanocasting method is designed as a superior electrocatalyst for the oxygen evolution reaction (OER). The well-designed composite delivers an efficient electrocatalytic activity with a low overpotential of 250 mV at 10 mA cm(-2)and excellent long-term stability with no degradation after 10 h of electrochemical OER test, superior to that of the state-of-the-art RuO(2)electrocatalyst in alkaline electrolyte. A comprehensive analysis demonstrates that the outstanding OER performance is due to the desirable combination of the highly exposed active centers in the Ce-doped bimetallic phosphides, efficient mass transfer, and effective electron conduction owing to the hierarchically mesoporous hybridization. Furthermore, the synergistic effect between Ce and CoP/Fe2P accelerates the migration rate of electrons/ions and increases the electrochemical active area. This excellent OER performance observed by Ce doping of CoP/Fe2P makes them possible candidates toward OER in alkaline electrolytes.
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