期刊
CHEM
卷 5, 期 2, 页码 445-459出版社
CELL PRESS
DOI: 10.1016/j.chempr.2018.11.010
关键词
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资金
- Australian Research Council [FL170100154, DP160104866, DP170104464, DE160101163, DE160101293]
- Chinese CSC Scholarship Program
- Thousand Talents Program for Distinguished Young Scholars
- National Natural Science Foundation of China [51701181]
- Zhejiang Provincial Natural Science Foundation of China [LR18B030003]
- Australian Research Council [DE160101293] Funding Source: Australian Research Council
Achieving high activity and long-term stability is a major challenge in the design of catalysts. In particular, the oxygen evolution reaction (OER) in acidic media, which plays a key role in proton exchange membrane electrolyzers for fast hydrogen fuel generation, seriously suffers from rapid degradation of catalysts as a result of the harsh acidic and oxidative conditions. Here, we report a rational design strategy for the fabrication of a heterostructured OER electrocatalyst (Ru@IrOx) that has unique physicochemical properties and in which a strong charge redistribution exists between a highly strained ruthenium core and a partially oxidized iridium shell across the metal-metal oxide heterojunction. The increased valence of the iridium shell and the decreased valence of the ruthenium core activate a synergistic electronic and structural interaction, which results in the enhanced activity and stability of the catalyst compared with the majority of the state-of-the-art ruthenium- and iridium-based materials.
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