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Springer, Catalysis Letters, 4(154), p. 1603-1610, 2023

DOI: 10.1007/s10562-023-04437-5

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Zn Loading Effects on the Selectivity of PdZn Catalysts for CO2 Hydrogenation to Methanol

Journal article published in 2023 by Naomi Lawes ORCID, Kieran J. Aggett ORCID, Louise R. Smith ORCID, Thomas J. A. Slater ORCID, Malcolm Dearg, David J. Morgan ORCID, Nicholas F. Dummer ORCID, Stuart H. Taylor ORCID, Graham J. Hutchings ORCID, Michael Bowker ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

AbstractPdZn/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. Graphical Abstract