Interconnected Network of Core-Shell CoP@CoBiPi for Efficient Water Oxidation Electrocatalysis under Near Neutral Conditions.
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.
['Cui|Liang|L|', 'Qu|Fengli|F|', 'Liu|Jingquan|J|', 'Du|Gu|G|', 'Asiri|Abdullah M|AM|', 'Sun|Xuping|X|']
D001729:Bismuth D002384:Catalysis D003035:Cobalt D004563:Electrochemistry D004566:Electrodes D010084:Oxidation-Reduction D010710:Phosphates D014867:Water
core-shell anodic polarization cobalt phosphide electrolysis oxygen evolution