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Pt Nanocluster Co-Catalysts for Photocatalytic Water Splitting

1
Department of Chemistry, The University of Adelaide, Adelaide 5005, Australia
2
Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane 4072, Australia
*
Authors to whom correspondence should be addressed.
Received: 18 October 2018 / Revised: 13 November 2018 / Accepted: 19 November 2018 / Published: 22 November 2018
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Abstract

Degussa P25 is a benchmark form of TiO2 used worldwide in photocatalysis studies. Currently, no such benchmark exists for co-catalysts, which are essential for many photocatalytic reactions. Here, we present the preparation of Pt nanocluster co-catalysts on TiO2 using an unmodified commercial source and equipment that is commonly available. Transmission electron microscopy reveals that the procedure produces TiO2 decorated with Pt atoms and nanoclusters (1–5 atoms). Optical reflectance and X-ray diffraction measurements show that the procedure does not affect the TiO2 polymorph or ultraviolet-visible (UV-Vis) absorbance. Gas phase photocatalytic splitting of heavy water (D2O) shows that the Pt nanocluster-decorated TiO2 outperforms Pt nanoparticle (produced by photodeposition) decorated TiO2 in D2 production. Pt nanoclusters, produced directly from a commercial source, with high co-catalyst activity, are prime candidates to be used in benchmark photocatalytic reactions. View Full-Text
Keywords: photocatalysis; co-catalysts; water splitting; hydrogen evolution; metallic cluster photocatalysis; co-catalysts; water splitting; hydrogen evolution; metallic cluster
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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MDPI and ACS Style

Shearer, C.J.; Alvino, J.F.; Batmunkh, M.; Metha, G.F. Pt Nanocluster Co-Catalysts for Photocatalytic Water Splitting. C 2018, 4, 64.

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