Sulfate-Functionalized RuFeOx as Highly Efficient Oxygen Evolution Reaction Electrocatalyst in Acid

Yanrong Xue; Jinjie Fang; Xingdong Wang; Zhiyuan Xu; Yufeng Zhang; Qingqing Lv; Mengyuan Liu; Wei Zhu; Zhongbin Zhuang

doi:10.1002/adfm.202101405

Sulfate-Functionalized RuFeO_x as Highly Efficient Oxygen Evolution Reaction Electrocatalyst in Acid

Yanrong Xue, Jinjie Fang, Xingdong Wang, Zhiyuan Xu, Yufeng Zhang, Qingqing Lv, Mengyuan Liu, Wei Zhu, Zhongbin Zhuang^*

^*Corresponding author for this work

Physical Sciences and Engineering

Research output: Contribution to journal › Article › peer-review

85 Scopus citations

Abstract

The design of highly active, stable, and low-cost electrocatalysts for the oxygen evolution reaction (OER) in proton exchange membrane water electrolyzer remains a challenge. RuO₂ shows relatively low cost but poor stability. Here, the critical role of sulfate anion doping in promoting OER activity and stability of RuO₂ is reported. Coupled with the Fe cation doping, the sulfate-functionalized RuFeO_x (S-RuFeO_x) displays a remarkable OER performance with a low overpotential of 187 mV at 10 mA cm⁻² in acid, and much enhanced stability. The excellent OER activity of S-RuFeO_x is attributed to the dual positive effects that the sulfate dopants weaken the adsorption of the *OO-H intermediate, and Fe dopants promote the deprotonation of chemisorbed water molecules to form *OOH. The enhanced stability is in part due to the sulfate dopants which stabilize the lattice oxygen. These results demonstrate that the anion and cation co-doped RuO₂ is a promising candidate for highly efficient OER electrocatalysts.

Original language	English (US)
Article number	2101405
Journal	Advanced Functional Materials
Volume	31
Issue number	32
DOIs	https://doi.org/10.1002/adfm.202101405
State	Published - Aug 9 2021

Bibliographical note

Funding Information:
This work was financially supported by the National Natural Science Foundation of China (21971008) and Fundamental Research Funds for the Central Universities (buctrc201916).

Publisher Copyright:
© 2021 Wiley-VCH GmbH

Keywords

adsorption
doping
oxygen evolution reaction
ruthenium
sulfate

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

Access to Document

10.1002/adfm.202101405

Cite this

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title = "Sulfate-Functionalized RuFeOx as Highly Efficient Oxygen Evolution Reaction Electrocatalyst in Acid",

abstract = "The design of highly active, stable, and low-cost electrocatalysts for the oxygen evolution reaction (OER) in proton exchange membrane water electrolyzer remains a challenge. RuO2 shows relatively low cost but poor stability. Here, the critical role of sulfate anion doping in promoting OER activity and stability of RuO2 is reported. Coupled with the Fe cation doping, the sulfate-functionalized RuFeOx (S-RuFeOx) displays a remarkable OER performance with a low overpotential of 187 mV at 10 mA cm−2 in acid, and much enhanced stability. The excellent OER activity of S-RuFeOx is attributed to the dual positive effects that the sulfate dopants weaken the adsorption of the *OO-H intermediate, and Fe dopants promote the deprotonation of chemisorbed water molecules to form *OOH. The enhanced stability is in part due to the sulfate dopants which stabilize the lattice oxygen. These results demonstrate that the anion and cation co-doped RuO2 is a promising candidate for highly efficient OER electrocatalysts.",

keywords = "adsorption, doping, oxygen evolution reaction, ruthenium, sulfate",

author = "Yanrong Xue and Jinjie Fang and Xingdong Wang and Zhiyuan Xu and Yufeng Zhang and Qingqing Lv and Mengyuan Liu and Wei Zhu and Zhongbin Zhuang",

note = "Funding Information: This work was financially supported by the National Natural Science Foundation of China (21971008) and Fundamental Research Funds for the Central Universities (buctrc201916). Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

year = "2021",

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AU - Xue, Yanrong

AU - Fang, Jinjie

AU - Wang, Xingdong

AU - Xu, Zhiyuan

AU - Zhang, Yufeng

AU - Lv, Qingqing

AU - Liu, Mengyuan

AU - Zhu, Wei

AU - Zhuang, Zhongbin

N1 - Funding Information: This work was financially supported by the National Natural Science Foundation of China (21971008) and Fundamental Research Funds for the Central Universities (buctrc201916). Publisher Copyright: © 2021 Wiley-VCH GmbH

PY - 2021/8/9

Y1 - 2021/8/9

N2 - The design of highly active, stable, and low-cost electrocatalysts for the oxygen evolution reaction (OER) in proton exchange membrane water electrolyzer remains a challenge. RuO2 shows relatively low cost but poor stability. Here, the critical role of sulfate anion doping in promoting OER activity and stability of RuO2 is reported. Coupled with the Fe cation doping, the sulfate-functionalized RuFeOx (S-RuFeOx) displays a remarkable OER performance with a low overpotential of 187 mV at 10 mA cm−2 in acid, and much enhanced stability. The excellent OER activity of S-RuFeOx is attributed to the dual positive effects that the sulfate dopants weaken the adsorption of the *OO-H intermediate, and Fe dopants promote the deprotonation of chemisorbed water molecules to form *OOH. The enhanced stability is in part due to the sulfate dopants which stabilize the lattice oxygen. These results demonstrate that the anion and cation co-doped RuO2 is a promising candidate for highly efficient OER electrocatalysts.

AB - The design of highly active, stable, and low-cost electrocatalysts for the oxygen evolution reaction (OER) in proton exchange membrane water electrolyzer remains a challenge. RuO2 shows relatively low cost but poor stability. Here, the critical role of sulfate anion doping in promoting OER activity and stability of RuO2 is reported. Coupled with the Fe cation doping, the sulfate-functionalized RuFeOx (S-RuFeOx) displays a remarkable OER performance with a low overpotential of 187 mV at 10 mA cm−2 in acid, and much enhanced stability. The excellent OER activity of S-RuFeOx is attributed to the dual positive effects that the sulfate dopants weaken the adsorption of the *OO-H intermediate, and Fe dopants promote the deprotonation of chemisorbed water molecules to form *OOH. The enhanced stability is in part due to the sulfate dopants which stabilize the lattice oxygen. These results demonstrate that the anion and cation co-doped RuO2 is a promising candidate for highly efficient OER electrocatalysts.

KW - adsorption

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