Janus Co/CoP Nanoparticles as Efficient Mott–Schottky Electrocatalysts for Overall Water Splitting in Wide pH Range

A controllable vacuum‐diffusion method for gradual phosphidation of carbon coated metallic Co nanoparticles into Co/CoP Janus nanoparticles is reported. Janus Co/CoP nanoparticles, as typical Mott–Schottky electrocatalysts, exhibit excellent hydrogen evolution reaction and oxygen evolution reaction...

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Veröffentlicht in:Advanced energy materials 2017-06, Vol.7 (12), p.n/a
Hauptverfasser: Xue, Zhong‐Hua, Su, Hui, Yu, Qiu‐Ying, Zhang, Bing, Wang, Hong‐Hui, Li, Xin‐Hao, Chen, Jie‐Sheng
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Sprache:eng
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Zusammenfassung:A controllable vacuum‐diffusion method for gradual phosphidation of carbon coated metallic Co nanoparticles into Co/CoP Janus nanoparticles is reported. Janus Co/CoP nanoparticles, as typical Mott–Schottky electrocatalysts, exhibit excellent hydrogen evolution reaction and oxygen evolution reaction performance in various electrolytes across wide pH range along with high durability. The Mott–Schottky Co/CoP catalyst can work as bifunctional electrode materials for overall water splitting in wide pH range and can achieve a current density of 10 mA cm−2 in neutral electrolyte at only 1.51 V. Mott–Schottky type Janus Co/CoP nanoparticles are constructed by a proof‐of‐concept strategy, promoting the overall water splitting activity as typical Mott–Schottky electrocatalysts. The electron redistribution at the Co/CoP interface significantly and generally boosts the catalytic activity of Janus nanoparticles for both hydrogen evolution reaction and oxygen evolution reaction across a wide pH range.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.201602355