期刊
NATURE COMMUNICATIONS
卷 7, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/ncomms12552
关键词
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资金
- I-CORE Program of the Planning and Budgeting Committee
- Israel Science Foundation [152/11]
- US-Israel Binational Science Foundation (BSF) [2011556]
- Deutsche Forschungsgemeinschaft (DIP) [LU315/17-1]
- Nancy & Stephen Grand Technion Energy Program (GTEP)
- Russell Berrie Nanotechnology Institute (RBNI)
- Technion's Hydrogen Technologies Research Laboratory (HTRL)
- Adelis Foundation
- Solar Fuels I-CORE
- Israeli Ministry of Science, Technology and Space
- Schulich Graduate fellowship
Photoelectrochemical water splitting uses solar power to decompose water to hydrogen and oxygen. Here we show how the photocatalytic activity of thylakoid membranes leads to overall water splitting in a bio-photo-electro-chemical (BPEC) cell via a simple process. Thylakoids extracted from spinach are introduced into a BPEC cell containing buffer solution with ferricyanide. Upon solar-simulated illumination, water oxidation takes place and electrons are shuttled by the ferri/ferrocyanide redox couple from the thylakoids to a transparent electrode serving as the anode, yielding a photocurrent density of 0.5mAcm(-2). Hydrogen evolution occurs at the cathode at a bias as low as 0.8V. A tandem cell comprising the BPEC cell and a Si photovoltaic module achieves overall water splitting with solar to hydrogen efficiency of 0.3%. These results demonstrate the promise of combining natural photosynthetic membranes and man-made photovoltaic cells in order to convert solar power into hydrogen fuel.
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