Preparation of highly active MoNi4 alloys in 3D porous nanostructures and their application as bifunctional electrocatalysts for overall water splitting

Gaoqi Tian; Shiwei Wu; Zhongli Chen; Yang Cao; Jinchun Tu; Xinlong Tian; Wei Huang; Jieqiong Wang; Lei Ding

Catalysis Communications (Nov 2021)

Preparation of highly active MoNi4 alloys in 3D porous nanostructures and their application as bifunctional electrocatalysts for overall water splitting

Gaoqi Tian,
Shiwei Wu,
Zhongli Chen,
Yang Cao,
Jinchun Tu,
Xinlong Tian,
Wei Huang,
Jieqiong Wang,
Lei Ding

Affiliations

Gaoqi Tian: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China
Shiwei Wu: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China
Zhongli Chen: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China
Yang Cao: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China; Qiongtai Normal University, Haikou 571127, Hainan, PR China
Jinchun Tu: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China
Xinlong Tian: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China
Wei Huang: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China
Jieqiong Wang: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China; Corresponding authors.
Lei Ding: State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, PR China; Corresponding authors.

Journal volume & issue: Vol. 159
p. 106350

Abstract

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The major challenges of replacing noble-metal electrocatalysts for hydrogen evolution reaction and oxygen evolution reaction in alkaline electrolytes are stability- and kinetics-related. Here we report the synthesis of MoNi4 electrocatalysts covered by MoO2 nanosheets on carbon cloth. Originating from the high intrinsic catalytic activity of MoNi4 nanoalloy, the 3D porous structure provides many exposed active sites and high conductivity. The sample exhibited high activity with an overpotential of 23 mV and 253 mV, a low Tafel slope of 47 mV dec−1 and 136 mV dec−1 at a current density of 10 mA cm−2 for HER and OER, respectively.

Published in Catalysis Communications

ISSN: 1566-7367 (Print); 1873-3905 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/catalysis-communications

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