title: Interconnected Network of Core-Shell CoP@CoBiPi for Efficient Water Oxidation Electrocatalysis under Near Neutral Conditions.
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-1at 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.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.|College of Chemical and Environmental Engineering, Qingdao University, Qingdao, 266071, Shandong, P. R. China.
authors.forename: Liang
authors.initials: L
authors.lastname: Cui
authors.affiliation: College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 2, 73165, Shandong, P. R. China.
authors.forename: Fengli
authors.initials: F
authors.lastname: Qu
authors.affiliation: College of Chemical and Environmental Engineering, Qingdao University, Qingdao, 266071, Shandong, P. R. China.
authors.forename: Jingquan
authors.initials: J
authors.lastname: Liu
authors.affiliation: Chengdu Institute of Geology and Mineral Resources, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Gu
authors.initials: G
authors.lastname: Du
authors.affiliation: Chemistry Department, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Asiri
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Xuping
authors.initials: X
authors.lastname: Sun
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D010084:Oxidation-Reduction; D010710:Phosphates / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D010710:Phosphates; D014867:Water; D003035:Cobalt; D001729:Bismuth
keywords: anodic polarization; cobalt phosphide; core-shell; electrolysis; oxygen evolution