Effect of Pt nanoparticle morphology on the aerobic oxidation of ethylene glycol to glycolic acid in water

Oberhauser, Werner, Evangelisti, Claudio, Nguyen, Xuan Trung, Filippi, Jonathan, Poggini, Lorenzo, Capozzoli, Laura, Manca, Gabriele, Kitching, Ella A., Slater, Thomas J. A. ORCID: https://orcid.org/0000-0003-0372-1551 and Danaie, Mohsen 2024. Effect of Pt nanoparticle morphology on the aerobic oxidation of ethylene glycol to glycolic acid in water. Inorganic Chemistry 63 (48) , pp. 22912-22922. 10.1021/acs.inorgchem.4c03970 Item availability restricted.

PDF - Accepted Post-Print Version Restricted to Repository staff only until 18 November 2025 due to copyright restrictions. Download (1MB)

Abstract

Pt nanoparticles (diameter <3 nm), generated by metal vapor synthesis and supported on a high surface area carbon, were used to catalyze the aerobic oxidation of ethylene glycol to glycolic acid (GA) in water under neutral and basic reaction conditions. Controlled heat treatment of the catalyst under a nitrogen atmosphere brought about the formation of a morphologically well-defined catalyst. A combination of atomic resolution electron microscopy, CO stripping voltammetry, and XPS analyses conducted on as-synthesized and heat-treated catalysts demonstrated the crucial role of the nanoparticles’ morphology on the stabilization of catalytically highly active Pt–OH surface species, which were key species for the Pt-catalyzed oxidation of the alcohol to the carbonyl functionality. The boosting effect of base on the catalyst’ s activity and GA selectivity has been proved experimentally (autoclave experiments). The effect of base on the nonmetal-catalyzed reaction steps (i.e., aerobic oxidation of carbonyl to acid functionality) has been proved by DFT calculations.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Cardiff Catalysis Institute (CCI) Chemistry
Publisher:	American Chemical Society
ISSN:	0020-1669
Date of First Compliant Deposit:	2 December 2024
Date of Acceptance:	7 November 2024
Last Modified:	02 Dec 2024 10:45
URI:	https://orca.cardiff.ac.uk/id/eprint/174330

Actions (repository staff only)

Edit Item