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Methanol synthesis from CO2 and H2 using supported Pd alloy catalysts

DOI: 10.1039/D2FD00119E DOI Help

Authors: Naomi Lawes (Cardiff Catalysis Institute, Cardiff University) , Isla Gow (Cardiff Catalysis Institute, Cardiff University) , Louise R. Smith (Cardiff Catalysis Institute, Cardiff University) , Kieran Aggett (Cardiff Catalysis Institute, Cardiff University) , James Hayward (Cardiff Catalysis Institute, Cardiff University) , Lara Kabalan (Cardiff Catalysis Institute, Cardiff University) , Andrew J. Logsdail (Cardiff Catalysis Institute, Cardiff University) , Thomas J. A. Slater (Cardiff Catalysis Institute, Cardiff University) , Malcolm Dearg (Cardiff Catalysis Institute, Cardiff University) , David J. Morgan (Cardiff Catalysis Institute, Cardiff University) , Nicholas F. Dummer (Cardiff Catalysis Institute, Cardiff University) , Stuart H. Taylor (Cardiff Catalysis Institute, Cardiff University) , C. Richard A. Catlow (Cardiff Catalysis Institute, Cardiff University) , Michael Bowker (Cardiff Catalysis Institute, Cardiff University) , Graham J. Hutchings (Cardiff Catalysis Institute, Cardiff University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Faraday Discussions

State: Published (Approved)
Published: June 2022
Diamond Proposal Number(s): 27530

Abstract: A number of Pd based materials have been synthesised and evaluated as catalysts for the conversion of carbon dioxide and hydrogen to methanol, a useful platform chemical and hydrogen storage molecule. Monometallic Pd catalysts shows poor methanol selectivity, but this is improved through the formation of Pd alloys, with both PdZn and PdGa alloys showing greatly enhanced methanol productivity compared with monometallic Pd/Al2O3 and Pd/TiO2 catalysts. Catalyst characterisation shows that the 1:1 β-PdZn alloy is present in all Zn containing post-reaction samples, including PdZn/Ga2O3, while the Pd2Ga alloy formed for the Pd/Ga2O3 sample. The heats of mixing were calculated for a variety of alloy compositions with high heats of mixing calculated for both PdZn and Pd2Ga alloys, with values of ca. -0.6 eV/atom and ca. -0.8 eV/atom, respectively. However, ZnO is more readily reduced than Ga2O3, providing a possible explanation for the preferential formation of the PdZn alloy, rather than PdGa. when in the presence of Ga2O3.

Diamond Keywords: Alloys; Carbon Capture and Storage (CCS)

Subject Areas: Materials, Chemistry, Environment

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

Added On: 29/06/2022 08:25

Documents:
d2fd00119e.pdf

Discipline Tags:

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

Technical Tags:

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