A Comparative Study of Pt Depositing Methods (Chemical Reduction vs Photo-Assisted Deposition) onto TiO2 Nanoparticles for Hydrogen Photo-Production

Ratnawati Ratnawati; Slamet Slamet; Viona Wongso; Jarnuzi  Gunlazuardi; Muhammad  Ibadurrohman

doi:10.5614/j.eng.technol.sci.2022.54.6.12

Authors

Ratnawati Ratnawati Department of Chemical Engineering, Institut Teknologi Indonesia, Jalan Puspitek Setu, Serpong,Tangerang Selatan 15320, Indonesia
Slamet Slamet Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI, Depok 16424, Indonesia
Viona Wongso Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI, Depok 16424, Indonesia
Jarnuzi Gunlazuardi Department of Chemistry, Faculty of Mathematics and Sciences, Universitas Indonesia, Kampus Baru UI, Depok 16424, Indonesia
Muhammad Ibadurrohman Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI, Depok 16424, Indonesia

DOI:

https://doi.org/10.5614/j.eng.technol.sci.2022.54.6.12

Keywords:

chemical reduction, hydrogen, photodeposition, platinum, TNP

Abstract

In this paper, we report a comparative study on two methods (chemical reduction and photo-assisted deposition) of incorporating Pt onto TiO₂nanoparticles (TNP) for H₂ generation. The phase structure of the photocatalysts was scrutinized utilizing TEM and XRD. The degree of dispersion of Pt on the TNP was calculated by a pulse chemisorption technique using TPDRO equipment. The results provided by TEM imagery, EDX spectra, elemental mapping, and AAS confirmed the successful deposition of Pt on TNP. XRD patterns confirmed an anatase and rutile crystallite structure, while UV-Vis spectra showed reduction of the bandgap from a typical value of 3.2 eV to ca. 2.9 eV. It was found that there is a correlation between the deposited Pt and dispersed Pt on the TNP with H₂ generation. The chemical reduction method offered a higher degree of Pt deposition, resulting in a 2.75 times larger amount of deposited Pt compared to photodeposition. This feature is perceived to contribute a higher H₂yield (3,283 mol) at 1 w% of Pt loading.

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Author Biography

Muhammad Ibadurrohman, Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI, Depok 16424, Indonesia

Department of Chemical Engineering, Faculty of Engineering

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