title: Al-Doped CoP nanoarray: a durable water-splitting electrocatalyst with superhigh activity.
abstract: The scalable production of hydrogen fuel through electrochemical water reduction needs efficient Earth-abundant electrocatalysts to make the whole water-splitting process more energy efficient. In this Article, we report that an Al-doped CoP nanoarray on carbon cloth (Al-CoP/CC) behaves as a durable hydrogen evolution electrocatalyst with superhigh activity in 0.5 M H2SO4. It demands a pretty low overpotential of 23 mV to drive a geometrical catalytic current density of 10 mA cm-2, outperforming all reported non-precious metal catalysts. Density functional theory calculations reveal that Al-CoP has a more thermo-neutral hydrogen adsorption free energy than CoP. Notably, this Al-CoP/CC is also superior in activity and durability as a bifunctional catalyst for alkaline water electrolysis, and its two-electrode water electrolyser delivers 10 mA cm-2water-splitting current at a cell voltage of 1.56 V in 1.0 M KOH. This work offers us an attractive cost-effective catalyst electrode in water-splitting devices for large-scale production of hydrogen fuels.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China. sunxp@scu.edu.cn sunxp@ciac.jl.cn.
authors.forename: Rong
authors.initials: R
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China. sunxp@scu.edu.cn sunxp@ciac.jl.cn.
authors.forename: Chun
authors.initials: C
authors.lastname: Tang
authors.affiliation: College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China.
authors.forename: Rongmei
authors.initials: R
authors.lastname: Kong
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, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
authors.forename: Abdullah M
authors.identifier: http://orcid.org/0000-0001-7905-3209
authors.initials: AM
authors.lastname: Asiri
authors.affiliation: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang, China. chenliang@nimte.ac.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.affiliation: College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China. sunxp@scu.edu.cn sunxp@ciac.jl.cn.
authors.forename: Xuping
authors.identifier: http://orcid.org/0000-0001-5034-1135
authors.initials: X
authors.lastname: Sun