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- Title
Interconnected Network of Core-Shell CoP@CoBiPi for Efficient Water Oxidation Electrocatalysis under Near Neutral Conditions.
- Authors
Cui, Liang; Qu, Fengli; Liu, Jingquan; Du, Gu; Asiri, Abdullah M.; Sun, Xuping
- Abstract
Developing earth-abundant electrocatalysts for efficient and stable water oxidation under near neutral conditions is of great importance but still remains a key challenge. Herein, we demonstrate the development of an interconnected network of core-shell CoP@CoBiPi through anodic polarization of a CoP nanoarray in potassium borate aqueous electrolyte (KBi). This 3 D CoP@CoBiPi exhibits high catalytic activity for water oxidation at pH 9.2 and needs an overpotential ( η) of only 410 mV to drive a geometrical catalytic current density of 10 mA cm−2, with a high turnover frequency of 819 h−1 at an overpotential of 610 mV. Remarkably, this catalyst also demonstrates high long-term electrochemical stability with its activity being maintained for at least 27 h in KBi. This study provides us an attractive earth-abundant 3 D catalyst electrode for water-splitting devices toward efficient and stable water oxidation under benign conditions.
- Subjects
COBALT phosphide; ELECTROCATALYSIS; ELECTROCATALYSTS; CATALYTIC activity; PH effect
- Publication
ChemSusChem, 2017, Vol 10, Issue 7, p1370
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.201700113