Interface engineering breaks both stability and activity limits of RuO2 for sustainable water oxidation

被引:279
作者
Du, Kun [1 ]
Zhang, Lifu [2 ]
Shan, Jieqiong [3 ]
Guo, Jiaxin [1 ]
Mao, Jing [1 ]
Yang, Chueh-Cheng [4 ,5 ]
Wang, Chia-Hsin [4 ]
Hu, Zhenpeng [2 ]
Ling, Tao [1 ]
机构
[1] Tianjin Univ, Sch Mat Sci & Engn, Inst New Energy, Key Lab Adv Ceram & Machining Technol,Minist Educ, Tianjin 300072, Peoples R China
[2] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
[3] Univ Adelaide, Sch Chem Engn & Adv Mat, Adelaide, SA 5005, Australia
[4] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan
[5] Natl Yang Ming Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan
基金
中国国家自然科学基金;
关键词
OXYGEN EVOLUTION REACTION; INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; ELECTROCATALYSTS; TRANSITION; DESIGN; OXIDES; IROX;
D O I
10.1038/s41467-022-33150-x
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
Designing catalytic materials with enhanced stability and activity is crucial for sustainable electrochemical energy technologies. RuO2 is the most active material for oxygen evolution reaction (OER) in electrolysers aiming at producing 'green' hydrogen, however it encounters critical electrochemical oxidation and dissolution issues during reaction. It remains a grand challenge to achieve stable and active RuO2 electrocatalyst as the current strategies usually enhance one of the two properties at the expense of the other. Here, we report breaking the stability and activity limits of RuO2 in neutral and alkaline environments by constructing a RuO2/CoOx interface. We demonstrate that RuO2 can be greatly stabilized on the CoOx substrate to exceed the Pourbaix stability limit of bulk RuO2. This is realized by the preferential oxidation of CoOx during OER and the electron gain of RuO2 through the interface. Besides, a highly active Ru/Co dual-atom site can be generated around the RuO2/CoOx interface to synergistically adsorb the oxygen intermediates, leading to a favourable reaction path. The as-designed RuO2/CoOx catalyst provides an avenue to achieve stable and active materials for sustainable electrochemical energy technologies. RuO2 encounters critical electrochemical dissolution issues during oxygen evolution reaction and it remains a grand challenge to achieve stable and active RuO2 electrocatalyst. Here, the authors report breaking stability and activity limits of RuO2 by constructing a RuO2/CoOx interface.
引用
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页数:9
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