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Enhanced Water Splitting at Thin Film Tungsten Trioxide Photoanodes Bearing Plasmonic Gold–Polyoxometalate Particles |
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| Authors: | Dr Renata Solarska Krzysztof Bienkowski Dr Sylwia Zoladek Aldona Majcher Dr Tomasz Stefaniuk Prof Pawel J Kulesza Prof Jan Augustynski |
| Institution: | 1. Faculty of Chemistry, University of Warsaw, Pasteura 1, 02‐093 Warsaw (Poland);2. Centre of New Technologies, University of Warsaw, Banacha 2c, 02‐097 Warsaw (Poland);3. Faculty of Physics, University of Warsaw, Pasteura 7, 02‐093 Warsaw (Poland) |
| Abstract: | Tungsten trioxide (WO3) is one of a few stable semiconductor materials liable to produce solar fuel by photoelectrochemical water splitting. To enhance its visible light conversion efficiency, we incorporated plasmonic gold nanoparticles (Au NPs) derivatized with polyoxometalate (H3PMo12O40) species into WO3. The combined plasmonic and catalytic effect of Au NPs anchored to the WO3 surface resulted in a large increase of water photooxidation currents. Shielding the Au NPs with polyoxometalates appears to be an effective means to avoid formation of recombination centers at the photoanode surface. |
| Keywords: | Keggin‐type structures plasmonic gold nanoparticles polyoxometalates solar energy conversion tungsten trioxide |