Solar Hydrogen Generation by Silicon Nanowires Modified with Platinum Nanoparticle Catalysts by Atomic Layer Deposition


  • This work was supported by the National Science Foundation (DMR 1055762). D.W. is an Alfred P. Sloan Fellow. P.D. is supported by the China Scholarship Council. J.H.Z. is supported by the National Basic Research Program of China (973 Program 2013CB934301) and the National Natural Science Foundation of China (NSFC91023011). We are grateful for technical support from S. Shepard and L.-Y. Chou.


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Covered with Pt: A uniform catalyst profile that ensures effective radial charge collection from high-aspect-ratio Si nanowires was achieved by atomic layer deposition of Pt nanoparticles. The resulting photoelectrode permits the measurement of high photovoltages and low overpotentials, and leads to very good stability against photooxidation of Si nanowires in solar water-reduction reactions.