Catalytic oxidation of glucose over highly stable AuxPdy NPs immobilised on ceria nanorods

Motaz Khawaji; Ines Graca; Ecaterina Ware; David Chadwick

doi:10.1016/j.cattod.2020.05.012

Catalytic oxidation of glucose over highly stable Au_xPd_y NPs immobilised on ceria nanorods

Motaz Khawaji, Ines Graca, Ecaterina Ware, David Chadwick^* (Corresponding Author)

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The catalytic performance of AuxPdy nanoparticles prepared by colloidal synthesis and immobilised on ceria nanorods (Ce-NR) in the selective oxidation of glucose has been studied under initially basic and relatively mild conditions. Activity was found to be strongly dependent on the bimetallic composition with Au-rich catalysts being more active in glucose oxidation. Catalyst recycling revealed
negligible deactivation or metal loss from leaching, and continuing high selectivity to gluconic acid (≥97.7%). Defects on the Ce-NR surface appear to serve as anchoring sites for Au-Pd NPs giving rise to small and very stable NPs.

Original language	English
Journal	Catalysis Today
Early online date	11 May 2020
DOIs	https://doi.org/10.1016/j.cattod.2020.05.012
Publication status	E-pub ahead of print - 11 May 2020

Keywords

glucose
gold-palladium
ceria
oxidation
gluconic acid
Gluconic acid
Ceria
Gold-Palladium
Oxidation
Glucose

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Khawaji_et_al_CT_CatalyticOxidationOfGlucose_AAM
Accepted author manuscript, 1.54 MB
Licence: CC BY-NC-ND
Embargo ends: 11/05/21

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title = "Catalytic oxidation of glucose over highly stable AuxPdy NPs immobilised on ceria nanorods",

abstract = "The catalytic performance of AuxPdy nanoparticles prepared by colloidal synthesis and immobilised on ceria nanorods (Ce-NR) in the selective oxidation of glucose has been studied under initially basic and relatively mild conditions. Activity was found to be strongly dependent on the bimetallic composition with Au-rich catalysts being more active in glucose oxidation. Catalyst recycling revealednegligible deactivation or metal loss from leaching, and continuing high selectivity to gluconic acid (≥97.7%). Defects on the Ce-NR surface appear to serve as anchoring sites for Au-Pd NPs giving rise to small and very stable NPs.",

keywords = "glucose, gold-palladium, ceria, oxidation, gluconic acid, Gluconic acid, Ceria, Gold-Palladium, Oxidation, Glucose",

author = "Motaz Khawaji and Ines Graca and Ecaterina Ware and David Chadwick",

note = "Acknowledgement Motaz Khawaji gratefully acknowledges the financial support of Saudi Aramco. This work was funded in part by Saudi Aramco and EPSRC(UK) grant EP/K014749/1. We are grateful to Professor Graham Hutchings and Dr. Robert Armstrong from Cardiff Catalysis Institute for providing us with a sample of glucaric acid.",

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AU - Graca, Ines

AU - Ware, Ecaterina

AU - Chadwick, David

N1 - Acknowledgement Motaz Khawaji gratefully acknowledges the financial support of Saudi Aramco. This work was funded in part by Saudi Aramco and EPSRC(UK) grant EP/K014749/1. We are grateful to Professor Graham Hutchings and Dr. Robert Armstrong from Cardiff Catalysis Institute for providing us with a sample of glucaric acid.

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AB - The catalytic performance of AuxPdy nanoparticles prepared by colloidal synthesis and immobilised on ceria nanorods (Ce-NR) in the selective oxidation of glucose has been studied under initially basic and relatively mild conditions. Activity was found to be strongly dependent on the bimetallic composition with Au-rich catalysts being more active in glucose oxidation. Catalyst recycling revealednegligible deactivation or metal loss from leaching, and continuing high selectivity to gluconic acid (≥97.7%). Defects on the Ce-NR surface appear to serve as anchoring sites for Au-Pd NPs giving rise to small and very stable NPs.

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