Atomically dispersed Ru doped on IrOx sub-nanoclusters for enhanced oxygen evolution reaction in acidic media

被引：4

作者：

Dong, Yan ^{[1
,2
,3
]}

Li, Yanle ^{[1
,5
]}

Lin, Yichao ^{[1
,2
]}

Chen, Anyang ^{[1
]}

Deng, Mengting ^{[1
]}

Zhang, Linjuan ^{[4
]}

Tian, Ziqi ^{[1
,2
]}

Chen, Liang ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Key Lab Adv Fuel Cells & Electrolyzers Te, Ningbo 315201, Zhejiang, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Hainan Univ, Sch Mat Sci & Engn, Haikou 570228, Peoples R China

[4] Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China

[5] Univ Elect Sci & Technol China, Yangtze Delta Reg Inst Huzhou, Huzhou 313000, Zhejiang, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2024年 / 12卷 / 33期

基金：

中国国家自然科学基金;

关键词：

ELECTROCATALYSTS; CATALYSTS; WATER; OXIDE;

D O I：

10.1039/d4ta01998a

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：

High-performance anodic electrocatalysts are urgently required for proton exchange membrane (PEM)-based water electrolysis. Here, a simple one-step approach is introduced to produce atomically dispersed Ru on iridium oxide (Ru-IrOx) sub-nanoclusters, aiming to simultaneously enhance the activity and durability of the electrocatalyst toward acidic oxygen evolution reaction (OER). The resulting catalyst shows a low overpotential (eta) of 237 mV at 10 mA cm(-2) in acidic media and demonstrates exceptional durability by sustaining a constant current of 100 mA cm(-2) for 150 hours. Real-time electrochemical impedance spectroscopy (EIS) measurements and in situ Raman spectra unveil the formation of a further oxidized layer on the surface that prevents the degradation of the catalyst. In addition, operando differential electrochemical mass spectrometry (DEMS) coupled with isotope labelling measurements ascertains that the catalysis process follows the adsorbate evolution mechanism (AEM), corresponding to outstanding stability.

引用

页码：21905 / 21911

页数：7

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