Photocatalytic H 2 Production on Au/TiO 2: Effect of Au Photodeposition on Different TiO 2 Crystalline Phases

Stefano Andrea Balsamo, Salvatore Sciré, Marcello Condorelli and Roberto Fiorenza
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Stefano Andrea Balsamo: Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
Salvatore Sciré: Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
Marcello Condorelli: Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
Roberto Fiorenza: Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy

J, 2022, vol. 5, issue 1, 1-13

Abstract: In this work, we investigated the role of the crystalline phases of titanium dioxide in the solar photocatalytic H 2 production by the reforming of glycerol, focusing the attention on the influence of photodeposited gold, as a metal co-catalyst, on TiO 2 surface. We correlated the photocatalytic activity of 1 wt% Au/TiO 2 in anatase, rutile, and brookite phases with the structural and optical properties determined by Raman spectroscopy, N 2 adsorption–desorption measurements, UV–vis Diffuse Reflectance Spectroscopy (UV–vis DRS), X-ray photoelectron spectroscopy (XPS), Photoluminescence spectroscopy (PL), and Dynamic Light scattering (DLS). The best results (2.55 mmol H 2 g cat −1 h −1 ) were obtained with anatase and gold photodeposited after 30 min of solar irradiation. The good performance of Au/TiO 2 in anatase form and the key importance of the strong interaction between gold and the peculiar crystalline phase of TiO 2 can be a starting point to efficiently improve photocatalysts design and experimental conditions, in order to favor a green hydrogen production through solar photocatalysis.

Keywords: hydrogen; photoreforming; titanium dioxide; glycerol; photocatalysis; gold (search for similar items in EconPapers)
JEL-codes: I1 I10 I12 I13 I14 I18 I19 (search for similar items in EconPapers)
Date: 2022
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