Preprint Article Version 1 This version is not peer-reviewed

Pt Nanocluster Co-Catalysts for Photocatalytic Water Splitting

Version 1 : Received: 27 July 2018 / Approved: 27 July 2018 / Online: 27 July 2018 (09:33:40 CEST)

How to cite: Shearer, C.; Alvino, J.F.; Batmunkh, M.; Metha, G. Pt Nanocluster Co-Catalysts for Photocatalytic Water Splitting. Preprints 2018, 2018070536 (doi: 10.20944/preprints201807.0536.v1). Shearer, C.; Alvino, J.F.; Batmunkh, M.; Metha, G. Pt Nanocluster Co-Catalysts for Photocatalytic Water Splitting. Preprints 2018, 2018070536 (doi: 10.20944/preprints201807.0536.v1).

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 atom and nanoclusters (1-5 atoms). Optical reflectance and X-ray diffraction measurements show that the procedure does not affect the TiO2 polymorph or 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.

Subject Areas

photocatalysis, co-catalysts, water splitting, metallic cluster

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