Eliminating over-oxidation of ruthenium oxides by niobium for highly stable electrocatalytic oxygen evolution in acidic media

被引：292

作者：

Liu, Hai ^{[1
]}

Zhang, Zhuang ^{[1
]}

Fang, Jinjie ^{[2
]}

Li, Mengxuan ^{[1
]}

Sendeku, Marshet Getaye ^{[3
]}

Wang, Xian ^{[4
]}

Wu, Haoyang ^{[1
]}

Li, Yaping ^{[1
]}

Ge, Junjie ^{[5
]}

Zhuang, Zhongbin ^{[2
]}

Zhou, Daojin ^{[1
]}

Kuang, Yun ^{[1
,3
]}

Sun, Xiaoming ^{[1
]}

机构：

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

[2] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

[3] Tsinghua Univ Shenzhen, Ocean Hydrogen Energy R&D Ctr, Res Inst, Shenzhen, Peoples R China

[4] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China

[5] Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Peoples R China

来源：

JOULE | 2023年 / 7卷 / 03期

基金：

美国国家科学基金会;

关键词：

WATER; PERFORMANCE; STABILITY; CATALYSTS; CORROSION; INSIGHTS; SITES;

D O I：

10.1016/j.joule.2023.02.012

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：

Proton exchange membrane (PEM) water electrolysis shows advan-tages including high current density, high efficiency, and compact configuration but suffers from the scarcity and high price of iridium (Ir)-based anodic catalysts. Herein, insoluble niobium (Nb)-incorpo-rated RuO2 with a high valence state was designed as an Ir-free cata-lyst for active and stable acidic oxygen evolution reaction (OER). Nb0.1Ru0.9O2 exhibited a low overpotential (204 mV) and superb stability with an ultralow degradation rate (25 mV/h) over a 360-h durability test at 200 mA cm -2, which is only 1/100th of the decay rates of other Ru-based catalysts measured at 10 mA cm -2. The PEM electrolyzer with Nb0.1Ru0.9O2 as an anode survived from a 1 00-h operation at 300 mA cm -2. The strengthened adsorption of oxygen intermediates to active Ru sites reduced the OER energy barrier, while the enhanced electron transfer to Ru by Nb doping and formation of Nb5+ during the OER process extended catalyst's durability.

引用

页码：558 / 573

页数：17

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