Dynamic oxygen adsorption on single-atomic Ruthenium catalyst with high performance for acidic oxygen evolution reaction

被引：599

作者：

Cao, Linlin ^{[1
]}

Luo, Qiquan ^{[2
]}

Chen, Jiajia ^{[2
]}

Wang, Lan ^{[3
]}

Lin, Yue ^{[2
]}

Wang, Huijuan ^{[4
]}

Liu, Xiaokang ^{[1
]}

Shen, Xinyi ^{[1
]}

Zhang, Wei ^{[1
]}

Liu, Wei ^{[1
]}

Qi, Zeming ^{[1
]}

Jiang, Zheng ^{[5
]}

Yang, Jinlong ^{[2
]}

Yao, Tao ^{[1
]}

机构：

[1] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[3] Southwest Univ Sci & Technol, Sch Natl Def Sci & Technol, Mianyang 621010, Sichuan, Peoples R China

[4] Univ Sci & Technol China, Expt Ctr Engn & Mat Sci, Hefei 230026, Anhui, Peoples R China

[5] Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201800, Peoples R China

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

WATER OXIDATION; REDUCTION REACTION; ACTIVE-SITES; HYDROGEN; ELECTROCATALYSTS; EFFICIENT; RU; CO; IDENTIFICATION; PHOTOCATALYST;

D O I：

10.1038/s41467-019-12886-z

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Achieving active and stable oxygen evolution reaction (OER) in acid media based on single-atom catalysts is highly promising for cost-effective and sustainable energy supply in proton electrolyte membrane electrolyzers. Here, we report an atomically dispersed Ru-1-N-4 site anchored on nitrogen-carbon support (Ru-N-C) as an efficient and durable electrocatalyst for acidic OER. The single-atom Ru-N-C catalyst delivers an exceptionally intrinsic activity, reaching a mass activity as high as 3571 A g(metal)(-1) and turnover frequency of 3348 O-2 h(-1) with a low overpotential of 267 mV at a current density of 10 mA cm(-2). The catalyst shows no evident deactivation or decomposition after 30-hour operation in acidic environment. Operando synchrotron radiation X-ray absorption spectroscopy and infrared spectroscopy identify the dynamic adsorption of single oxygen atom on Ru site under working potentials, and theoretical calculations demonstrate that the O-Ru-1-N-4 site is responsible for the high OER activity and stability.

引用

页数：9

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