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

DOI: 10.1007/s10562-023-04437-5

Authors: Naomi Lawes (Cardiff University) , Kieran J. Aggett (Cardiff University) , Louise R. Smith (Cardiff University) , Thomas J. A. Slater (Diamond Light Source) , Malcolm Dearg (Cardiff University) , David J. Morgan (Cardiff University) , Nicholas F. Dummer (Cardiff University) , Stuart H. Taylor (Cardiff University) , Graham J. Hutchings (Cardiff University) , Michael Bowker (Cardiff University; UK Catalysis Hub, Research Complex at Harwell)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Catalysis Letters , VOL 49

State: Published (Approved)
Published: August 2023
Diamond Proposal Number(s): 27530 , 31044

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.

Subject Areas: Chemistry, Materials

Diamond Offline Facilities: Electron Physical Sciences Imaging Centre (ePSIC)
Instruments: E01-JEM ARM 200CF

Added On: 29/08/2023 09:15

Documents:
s10562-023-04437-5.pdf

Discipline Tags:

Earth Sciences & Environment Climate Change Physical Chemistry Catalysis Chemistry Materials Science

Technical Tags:

Microscopy Electron Microscopy (EM) Transmission Electron Microscopy (TEM) Scanning Transmission Electron Microscopy (STEM)