Enhanced Oxygen Evolution Reaction Electrocatalysis on Co(OH)(2)@MnO2 Decorated Carbon Nanoarrays: Effect of Heterostructure, Conductivity and Charge Storgae Capability

Zheng, Tianlong1; He, Jing1; Cai, Pingwei2; Liu, Xi2; Wu, Duojie3; Song, Lutao4,5; He, Qinggang1,6; Tang, Yizhao1; Wang, Guangjin7; Gu, Meng3; Lu, Jianguo4,5; Hu, Yongfeng8; Wen, Zhenhai2

2021-11-01

10.1149/1945-7111/ac393f

JOURNAL OF THE ELECTROCHEMICAL SOCIETY   影响因子和分区

0013-4651

1945-7111

Self-supporting three-dimensional (3D) transition metal electrodes have been considered for designing high-performance non-noble metal oxygen evolution reaction (OER) catalysts owing to their advantages such as binder-free, good mass transfer, and large specific surface area. However, the poor conductivity of ((oxy)hydr)oxides and the difficulty in adjusting their electronic structure limit their application. As an alternative strategy, instead of constituting the array electrode by the active components themselves, we herein report 3D Co(OH)(2)@MnO2 heterostructure decorated carbon nanoarrays grown directly on carbon paper (Co(OH)(2)@MnO2-CNAs). This unique structure can not only enhance electrical conductivity but also provide a larger specific surface area, and facilitate electrolyte diffusion and ion transport. The heterostructured Co(OH)(2)@MnO2 formed via incorporation with MnO2 facilitates the transition of Co-II to Co-III in Co(OH)(2) and it increases the storage of oxidative charge in the catalyst, leading to an OER activity matching with benchmark RuO2 and good stability. Density functional theory calculations suggest that the improved OER performance can be attributed to the formation of the heterojunction structure, resulting in the modulation of the electronic structure of Co atoms and the reduction of the free energy barrier of the rate-determining step for the OER. (C) 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.

SCI ; EI

英语

其他

National Natural Science Foundation of China[21978260,22178307]

Electrochemistry ; Materials Science

Electrochemistry ; Materials Science, Coatings & Films

WOS:000723862300001

ELECTROCHEMICAL SOC INC

20215111331520

Carbon ; Density functional theory ; Electrocatalysis ; Electrocatalysts ; Electrodes ; Electrolytes ; Electronic structure ; Free energy ; Mass transfer ; Oxygen ; Precious metals ; Ruthenium compounds ; Specific surface area

Precious Metals:547.1 ; Thermodynamics:641.1 ; Mass Transfer:641.3 ; Electric Batteries and Fuel Cells:702 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

CHEMISTRY

Web of Science

1.Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China
2.Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Energy Mat Elect Power, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
5.Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China
6.Zhejiang Univ, Ningbo Res Inst, Ningbo 315100, Zhejiang, Peoples R China
7.Foshan Univ, Sch Mat Sci & Hydrogen Energy, Foshan 528000, Peoples R China
8.Sinopec, Shanghai Res Inst Petrochem Technol, Shanghai 201208, Peoples R China

Zheng, Tianlong,He, Jing,Cai, Pingwei,et al. Enhanced Oxygen Evolution Reaction Electrocatalysis on Co(OH)(2)@MnO2 Decorated Carbon Nanoarrays: Effect of Heterostructure, Conductivity and Charge Storgae Capability[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2021,168(11).

Zheng, Tianlong.,He, Jing.,Cai, Pingwei.,Liu, Xi.,Wu, Duojie.,...&Wen, Zhenhai.(2021).Enhanced Oxygen Evolution Reaction Electrocatalysis on Co(OH)(2)@MnO2 Decorated Carbon Nanoarrays: Effect of Heterostructure, Conductivity and Charge Storgae Capability.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,168(11).

Zheng, Tianlong,et al."Enhanced Oxygen Evolution Reaction Electrocatalysis on Co(OH)(2)@MnO2 Decorated Carbon Nanoarrays: Effect of Heterostructure, Conductivity and Charge Storgae Capability".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 168.11(2021).