Photocatalytic reforming of a glycerol water mixture on Pt/TiO2 catalysts

Ahmad, Bello Bungudu 2022. Photocatalytic reforming of a glycerol water mixture on Pt/TiO2 catalysts. PhD Thesis, Cardiff University. Item availability restricted.

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Abstract

The aim of this research was to develop photocatalysts through series of treatments and to determine which are active toward photo reforming of a glycerol water mixture for hydrogen production. All the catalysts used in this study were prepared by a modified impregnation method. Different bimetals and a mono metal were loaded onto titania and served as photocatalysts for photocatalytic glycerol reforming for hydrogen production. The catalysts were characterised using X-ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM), Scanning transmission electron microscopy (STEM), Energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and UV diffuse reflectance spectroscopy to confirm the status of the catalysts being produced. Reduction (R) and calcination reduction (CR) heat treatment have remained the best toward influencing the catalysts photoactivity regardless of weight loadings. High concentration of chloride ions found to inhibit hydrogen production. The XPS spectra of the survey had confirmed the presence of chloride ion. Thus, it implies Cl- at high concentration adsorbed onto surface of catalyst and blocked the active sites of the catalyst. PtRu/TiO2 has the lowest activity among bimetallic catalysts, even though, the result obtained UV diffuse reflectance analysis revealed the plasmon of PtRu around visible region. Hence it absorbed light far beyond UV region. The attempt to degrade the lignin model compounds was not successful by the experiment being designed in this work.

Item Type:	Thesis (PhD)
Status:	Unpublished
Schools:	Chemistry
Date of First Compliant Deposit:	2 November 2022
Last Modified:	03 Nov 2022 09:58
URI:	https://orca.cardiff.ac.uk/id/eprint/153942

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