This title appears in the Scientific Report :
2015
Please use the identifier:
http://hdl.handle.net/2128/9617 in citations.
Please use the identifier: http://dx.doi.org/10.1038/ncomms8824 in citations.
Efficient water reduction with gallium phosphide nanowires
Efficient water reduction with gallium phosphide nanowires
Photoelectrochemical hydrogen production from solar energy and water offers a clean and sustainable fuel option for the future. Planar III/V material systems have shown the highest efficiencies, but are expensive. By moving to the nanowire regime the demand on material quantity is reduced, and new m...
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Personal Name(s): | Standing, Anthony |
---|---|
Assali, Simone / Gao, Lu / Verheijen, Marcel A. / van Dam, Dick / Cui, Yingchao / Notten, Peter H. L. / Haverkort, Jos E. M. / Bakkers, Erik P. A. M. (Corresponding author) | |
Contributing Institute: |
Grundlagen der Elektrochemie; IEK-9 |
Published in: | Nature Communications, 6 (2015) S. 7824 - |
Imprint: |
London
Nature Publishing Group
2015
|
PubMed ID: |
26183949 |
DOI: |
10.1038/ncomms8824 |
Document Type: |
Journal Article |
Research Program: |
Electrochemical Storage |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1038/ncomms8824 in citations.
Photoelectrochemical hydrogen production from solar energy and water offers a clean and sustainable fuel option for the future. Planar III/V material systems have shown the highest efficiencies, but are expensive. By moving to the nanowire regime the demand on material quantity is reduced, and new materials can be uncovered, such as wurtzite gallium phosphide, featuring a direct bandgap. This is one of the few materials combining large solar light absorption and (close to) ideal band-edge positions for full water splitting. Here we report the photoelectrochemical reduction of water, on a p-type wurtzite gallium phosphide nanowire photocathode. By modifying geometry to reduce electrical resistance and enhance optical absorption, and modifying the surface with a multistep platinum deposition, high current densities and open circuit potentials were achieved. Our results demonstrate the capabilities of this material, even when used in such low quantities, as in nanowires |