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A new class of Cu/ZnO catalysts derived from zincian georgeite precursors prepared by co-precipitation

Smith, Paul John, Kondrat, Simon A., Chater, Philip A., Yeo, Ben, Shaw, Greg, Lu, Li, Bartley, Jonathan Keith, Taylor, Stuart Hamilton, Spencer, Michael, Kiely, Christopher John, Kelly, Gordon, Park, Colin and Hutchings, Graham John 2017. A new class of Cu/ZnO catalysts derived from zincian georgeite precursors prepared by co-precipitation. Chemical Science 8 (3) , pp. 2436-2447. 10.1039/C6SC04130B

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Abstract

Zincian georgeite, an amorphous copper-zinc hydroxycarbonate, has been prepared by co-precipitation using acetate salts and ammonium carbonate. Incorporation of zinc into the georgeite phase and mild ageing conditions inhibits crystallisation into zincian malachite or aurichalcite. This zincian georgeite precursor was used to prepare a Cu/ZnO catalyst, which exhibits a superior performance to a zincian malachite derived catalyst for methanol synthesis and the low temperature water-gas shift (LTS) reaction. Furthermore, the enhanced LTS activity and stability in comparison to that of a commercial Cu/ZnO/Al2O3 catalyst, indicates that the addition of alumina as a stabiliser may not be required for the zincian georgeite derived Cu/ZnO catalyst. The enhanced performance is partly attributed to the exclusion of alkali metals from the synthesis procedure, which are known to act as catalyst poisons. The effect of residual sodium on the microstructural properties of the catalyst precursor was investigated further with preparations using sodium carbonate.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Chemistry
Subjects: Q Science > QD Chemistry
Publisher: Royal Society of Chemistry
ISSN: 2041-6520
Funders: EPSRC
Date of First Compliant Deposit: 9 January 2017
Date of Acceptance: 29 December 2016
Last Modified: 24 Jun 2019 21:43
URI: http://orca-mwe.cf.ac.uk/id/eprint/97282

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