title: High-Performance Electrolytic Oxygen Evolution in Neutral Media Catalyzed by a Cobalt Phosphate Nanoarray.
abstract: The topotactic conversion of cobalt phosphide nanoarray on Ti mesh into a cobalt phosphate nanoarray (Co-Pi NA) via oxidative polarization in phosphate-buffered water is presented. As a 3D oxygen evolution reaction (OER) catalyst electrode at neutral pH, the resulting Co-Pi NA/Ti shows exceptionally high catalytic activity and demands an overpotential of only 450 mV to drive a geometrical catalytic current density of 10 mA cm-2. Notably, this catalyst also shows superior long-term electrochemical stability. The excellent catalytic activity can be attributed to that such 3D nanoarray configuration allows for the exposure of more active sites and the easier diffusion of electrolytes and oxygen.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Lisi
authors.initials: L
authors.lastname: Xie
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Cui
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Danni
authors.initials: D
authors.lastname: Liu
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Hao
authors.affiliation: Analytical and Test Center, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, China.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Chengdu institute of Geology and Mineral Resources, Chengdu, 610081, Sichuan, 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, China.
authors.forename: Xuping
authors.initials: X
authors.lastname: Sun
keywords: cobalt phosphate; electrolysis; nanoarrays; neutral electrolytes; oxygen evolution