Synergistic coupling of CoFe-layered double hydroxide nanosheet arrays with reduced graphene oxide modified Ni foam for highly efficient oxygen evolution reaction and hydrogen evolution reaction

被引：64

作者：

Guo, Jiawei ^{[1
]}

Wei, Zhuojun ^{[1
]}

Wang, Kun ^{[1
]}

Zhang, Hui ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 54期

基金：

中国国家自然科学基金;

关键词：

Layered double hydroxide; Reduced graphene oxide; Nanosheet arrays; Oxygen evolution reaction; Hydrogen evolution reaction; Electrocatalysis; CARBON NANOTUBES; ELECTROCATALYSTS; CATALYSTS; HYBRID; HETEROSTRUCTURES; VACANCIES; REDUCTION; FE;

D O I：

10.1016/j.ijhydene.2021.06.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Novel CoFe-LDH (layered double hydroxide) nanosheet arrays in situ grown on rGO (reduced graphene oxide) uniformly modified Ni foam were synthesized by a citric acidassisted aqueous phase coprecipitation strategy. Systematic characterizations indicates that the series of CoxFe1-LDH/rGO/NF (x = 4, 3, 2) all show CoxFe1-LDH nanosheets (150-180 x 15 nm) grown vertically on the surface of rGO/NF. Especially, the Co3Fe1-LDH/rGO/NF exhibits the best performance with overpotentials of 250 and 110 mV at 10 mA cm(-2) in 1 M KOH for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively. When it is used as cathode and anode simultaneously for overall water splitting, they require 1.65 and 1.84 V at 10 and 100 mA cm(-2), respectively. Excellent performance of Co3Fe1-LDH/rGO/NF is due to the nanosheet arrays structure with open channels, synergistic coupling between Co3Fe1-LDH and rGO enhancing electrical conductivity, and in-situ growth of Co3Fe1-LDH on rGO/NF enhancing stability. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：27529 / 27542

页数：14

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