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Continuous flow synthesis of bimetallic AuPd catalysts for the selective oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid

Cattaneo, Stefano, Bonincontro, Danilo, Bere, Takudzwa, Kiely, Christopher J., Hutchings, Graham J., Dimitratos, Nikolaos and Albonetti, Stefania 2020. Continuous flow synthesis of bimetallic AuPd catalysts for the selective oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid. ChemNanoMat 6 (3) , pp. 420-426. 10.1002/cnma.201900704
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Abstract

The production of 2,5‐furandicarboxylic acid (FDCA) from the selective oxidation of 5‐hydroxymethylfurfural (HMF) is a critical step in the production of biopolymers from biomass‐derived materials. In this study, we report the catalytic performance of monometallic Au and Pd, and bimetallic AuPd nanoparticles with different Au:Pd molar ratios synthesised under continuous flow conditions using a millifluidic set‐up and subsequently deposited onto titanium dioxide as the chosen support. This synthetic technique provided a better control over mean particle size and metal alloy composition, that resulted in higher FDCA yield when the catalysts were compared to similar batch‐synthesised materials. A 99 % FDCA yield was obtained with the millifluidic‐prepared AuPd/TiO2 catalyst (Au:Pd molar composition of 75:25) after being calcined and reduced at 200 °C. The heat treatment caused a partial removal of the protective ligand (polyvinyl alcohol) encapsulating the nanoparticles and so induced stronger metal‐support interactions. The catalyst reusability was also tested, and showed limited particle sintering after five reaction cycles.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Wiley
ISSN: 2199-692X
Funders: MAXNET
Date of First Compliant Deposit: 9 January 2020
Date of Acceptance: 7 January 2020
Last Modified: 30 Jul 2020 15:53
URI: http://orca.cf.ac.uk/id/eprint/128372

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