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

Author

Listed:
  • 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)

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.

Suggested Citation

  • Stefano Andrea Balsamo & Salvatore Sciré & Marcello Condorelli & Roberto Fiorenza, 2022. "Photocatalytic H 2 Production on Au/TiO 2 : Effect of Au Photodeposition on Different TiO 2 Crystalline Phases," J, MDPI, vol. 5(1), pages 1-13, January.
    • Handle: RePEc:gam:jjopen:v:5:y:2022:i:1:p:6-104:d:731823
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    References listed on IDEAS

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    1. Lakhera, Sandeep Kumar & Rajan, Aswathy & T.P., Rugma & Bernaurdshaw, Neppolian, 2021. "A review on particulate photocatalytic hydrogen production system: Progress made in achieving high energy conversion efficiency and key challenges ahead," Renewable and Sustainable Energy Reviews, Elsevier, vol. 152(C).
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