Print Email Facebook Twitter Efficient water reduction with gallium phosphide nanowires Title Efficient water reduction with gallium phosphide nanowires Author Standing, A. Assali, S. Gao, L. Verheijen, M.A. Van Dam, D. Cui, Y. Notten, P.H.L. Haverkort, J.E.M. Bakkers, E.P.A.M. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2015-07-17 Abstract 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. Subject chemical sciencescatalysisnanotechnology To reference this document use: http://resolver.tudelft.nl/uuid:a2daf5ed-f531-4cdf-a373-e7746789fb03 Publisher Nature Publishing Group ISSN 2041-1723 Source Nature Communications, 6, 2015 Part of collection Institutional Repository Document type journal article Rights (c) 2015 Macmillan PublishersThis work is licensed under a Creative Commons Attribution 4.0 International License. Files PDF 322785.pdf 1.59 MB Close viewer /islandora/object/uuid:a2daf5ed-f531-4cdf-a373-e7746789fb03/datastream/OBJ/view