期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 14, 页码 4622-4626出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201814625
关键词
acidic solution; hydrogen production; membrane-free; pyrene-4,5,9,10-tetraone; water electrolysis
资金
- National Natural Science Foundation of China [21622303, 21333002]
- National Key Research and Development Plan [2016YFB0901500]
- State Key Basic Research Program of China [2016YFA0203302]
Hydrogen production from water via electrolysis in acid is attracting extensive attention as an attractive alternative approach to replacing fossil fuels. However, the simultaneous evolution of H-2 and O-2 requires a fluorine-containing proton exchange membrane to prevent the gases from mixing while using the same space to concentrate the gases, which significantly increases the cost and reduces the flexibility of this approach. Here, a battery electrode based on the highly reversible enolization reaction of pyrene-4,5,9,10-tetraone is first introduced as a solid-state proton buffer to separate the O-2 and H-2 evolution of acidic water electrolysis in space and time, through which the gas mixing issue can be avoided without using any membrane. This process allows us to separately consider H-2 and O-2 production according to the variation in input power (e.g., the renewable energy) and/or the location for H-2 concentration, thus showing high flexibility for H-2 production.
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