期刊
NATURE CHEMISTRY
卷 5, 期 5, 页码 403-409出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nchem.1621
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资金
- Engineering and Physical Sciences Research Council (UK)
- Glasgow Solar Fuels
- Royal Society/Wolfson Foundation
- University of Glasgow
- Engineering and Physical Sciences Research Council [EP/J00135X/1] Funding Source: researchfish
- EPSRC [EP/J00135X/1] Funding Source: UKRI
Hydrogen is essential to several key industrial processes and could play a major role as an energy carrier in a future 'hydrogen economy'. Although the majority of the world's hydrogen supply currently comes from the reformation of fossil fuels, its generation from water using renewables-generated power could provide a hydrogen source without increasing atmospheric CO2 levels. Conventional water electrolysis produces H-2 and O-2 simultaneously, such that these gases must be generated in separate spaces to prevent their mixing. Herein, using the polyoxometalate H3PMo12O40, we introduce the concept of the electron-coupled-proton buffer (ECPB), whereby O-2 and H-2 can be produced at separate times during water electrolysis. This could have advantages in preventing gas mixing in the headspaces of high-pressure electrolysis cells, with implications for safety and electrolyser degradation. Furthermore, we demonstrate that temporally separated O-2 and H-2 production allows greater flexibility regarding the membranes and electrodes that can be used in water-splitting cells.
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