PdZn catalysts for CO2hydrogenation to methanol using chemical vapour impregnation (CVI).
The formation of PdZn bimetallic alloys on ZnO, TiO2and Al2O3supports was investigated, together with the effect of alloy formation on the CO2hydrogenation reaction. The chemical vapour impregnation (CVI) method produced PdZn nanoparticles with diameters of 3-6 nm. X-ray photoelectron spectroscopy and X-ray diffraction revealed the changes in the structure of the PdZn alloy that help stabilise formate intermediates during methanol synthesis. PdZn supported on TiO2exhibits high methanol productivity of 1730 mmol kgcat-1h-1that is associated with the high dispersion of the supported PdZn alloy.
Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT Cardiff, UK. bowkerm@cardiff.ac.uk.
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H
Bahruji
M
M
Bowker
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W
Jones
J
J
Hayward
J
J
Ruiz Esquius
D J
DJ
Morgan
G J
GJ
Hutchings