Please use this identifier to cite or link to this item: https://doi.org/10.1038/s41586-022-04397-7
Title: Au-Pd Separation Enhances Bimetallic Catalysis of Alcohol Oxidation
Authors: Huang, X
Akdim, O
Douthwaite, M
Wang, K
Zhao, L
Lewis, RJ
Pattisson, S
Daniel, IT
Miedziak, PJ
Shaw, G
Morgan, DJ
Althahban, SM
Davies, TE
He, Q 
Wang, F
Fu, J
Bethell, D
McIntosh, S
Kiely, CJ
Hutchings, GJ
Issue Date: 1-Jan-2022
Publisher: Springer Science and Business Media LLC
Citation: Huang, X, Akdim, O, Douthwaite, M, Wang, K, Zhao, L, Lewis, RJ, Pattisson, S, Daniel, IT, Miedziak, PJ, Shaw, G, Morgan, DJ, Althahban, SM, Davies, TE, He, Q, Wang, F, Fu, J, Bethell, D, McIntosh, S, Kiely, CJ, Hutchings, GJ (2022-01-01). Au-Pd Separation Enhances Bimetallic Catalysis of Alcohol Oxidation. Nature. ScholarBank@NUS Repository. https://doi.org/10.1038/s41586-022-04397-7
Abstract: In oxidation reactions catalysed by supported metal nanoparticles with oxygen as the terminal oxidant, the rate of the oxygen reduction can be a limiting factor. This is exemplified by the oxidative dehydrogenation of alcohols, an important class of reactions with modern commercial applications1–3. Supported gold nanoparticles are highly active for the dehydrogenation of the alcohol to an aldehyde4 but are less effective for oxygen reduction5,6. In contrast, supported palladium nanoparticles are less active than gold for dehydrogenation but offer high efficacy for oxygen reduction5,6. This imbalance can be overcome by alloying gold with palladium which gives enhanced activity to both reactions7,8; however, the electrochemical potential of the alloy is a compromise between that of the two metals meaning that although the oxygen reduction is improved in the alloy, the dehydrogenation activity is poorer. Here we show that by separating the gold and palladium components in bimetallic carbon-supported catalysts we can almost double the reaction rate beyond that achieved with a corresponding alloy catalyst. We demonstrate this using physical mixtures of carbon-supported monometallic gold and palladium and a bimetallic catalyst comprising separated gold and palladium regions. Furthermore, we demonstrate electrochemically that this enhancement is attributable to the coupling of separate redox processes occurring at isolated gold and palladium sites. The discovery of this novel catalytic effect, a cooperative redox enhancement (CORE), offers a new approach to the design of multi-component heterogeneous catalysts.
Source Title: Nature
URI: https://scholarbank.nus.edu.sg/handle/10635/216397
ISSN: 00280836
14764687
DOI: 10.1038/s41586-022-04397-7
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Manuscript_Final_v2.docxSubmitted version2.37 MBMicrosoft Word XML

OPEN

Post-printView/Download

SCOPUSTM   
Citations

33
checked on Feb 3, 2023

Page view(s)

101
checked on Feb 2, 2023

Download(s)

2
checked on Feb 2, 2023

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.