title: Hydrotalcite-like Ni(OH)2Nanosheets in Situ Grown on Nickel Foam for Overall Water Splitting.
abstract: Designing economical and high-efficiency electrocatalysts for overall water splitting is urgently needed but remains a long and arduous task. Herein, we synthesized hydrotalcite-like Ni(OH)2nanosheets growing on Ni foam (Ni(OH)2/NF) via a facile one-pot hydrothermal method. With the assistance of a rotating oven, Ni(OH)2nanosheets demonstrate a regular hexagonal morphology and homogeneous distribution. The resultant Ni(OH)2/NF electrode shows superior electrocatalytic activity and durability for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), as well as the overall water splitting. The Ni(OH)2/NF electrode delivers 20 mA·cm-2at an overpotential of 172 mV for HER, 50 mA·cm-2at an overpotential of 330 mV for OER, and 10 mA·cm-2at a cell voltage of 1.68 V for water electrolysis in 1.0 M KOH. The present study demonstrates a feasible and effective strategy to prepare highly efficient electrocatalysts for water electrolysis.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Rao
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Ning
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China.
authors.forename: Mingbo
authors.initials: M
authors.lastname: Wu
keywords: Ni(OH)2; hydrogen evolution reaction; nickel foam; overall water splitting; oxygen evolution reaction