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Interconnected Network of Core-Shell CoP@CoBiPi for Efficient Water Oxidation Electrocatalysis under Near Neutral Conditions.
- Source :
- ChemSusChem; 4/10/2017, Vol. 10 Issue 7, p1370-1374, 5p
- Publication Year :
- 2017
-
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<superscript>−2</superscript>, with a high turnover frequency of 819 h<superscript>−1</superscript> 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- COBALT phosphide
ELECTROCATALYSIS
ELECTROCATALYSTS
CATALYTIC activity
PH effect
Subjects
Details
- Language :
- English
- ISSN :
- 18645631
- Volume :
- 10
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- ChemSusChem
- Publication Type :
- Academic Journal
- Accession number :
- 122404091
- Full Text :
- https://doi.org/10.1002/cssc.201700113