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: https://orcid.org/0000-0003-0372-1551, Dearg, Malcolm, Morgan, David J. ORCID: https://orcid.org/0000-0002-6571-5731, Dummer, Nicholas F. ORCID: https://orcid.org/0000-0002-0946-6304, Taylor, Stuart H. ORCID: https://orcid.org/0000-0002-1933-4874, Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 and Bowker, Michael ORCID: https://orcid.org/0000-0001-5075-1089 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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Abstract

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
URI:	https://orca.cardiff.ac.uk/id/eprint/162813

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