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Zn loading effects on the selectivity of PdZn catalysts for CO2 hydrogenation to methanol

Lawes, Naomi, Aggett, Kieran J., Smith, Louise R., Slater, Thomas J. A. ORCID:, Dearg, Malcolm, Morgan, David J. ORCID:, Dummer, Nicholas F. ORCID:, Taylor, Stuart H. ORCID:, Hutchings, Graham J. ORCID: and Bowker, Michael ORCID: 2024. Zn loading effects on the selectivity of PdZn catalysts for CO2 hydrogenation to methanol. Catalysis Letters 154 (4) , pp. 1603-1610. 10.1007/s10562-023-04437-5

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PdZn/TiO2 catalysts have been investigated for the hydrogenation of CO2 to methanol. Varying the ratio of Pd and Zn using TiO2 as a support has a dramatic effect on catalytic performance. Chemical vapour impregnation was used to produce PdZn alloys on TiO2 and X-ray diffraction, X-ray photoelectron spectroscopy, and scanning transmission electron microscopy revealed changes in the structure at varying total PdZn molar ratios. Compared to monometallic Pd/TiO2, introducing a low loading of Zn drastically changes product selectivity. When Pd is alloyed with Zn above a total Zn/Pd = 1 molar ratio, methanol selectivity is improved. Therefore, for enhanced methanol productivity, it is crucial for the Zn loading to be higher than that required for the stoichiometric formation of the 1:1 β-PdZn alloy.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Springer
ISSN: 1011-372X
Funders: EPSRC
Date of First Compliant Deposit: 28 September 2023
Date of Acceptance: 3 August 2023
Last Modified: 11 Apr 2024 11:54

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