Platinum deposition on functionalised graphene for corrosion resistant oxygen reduction electrodes
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Graphene-related materials are promising supports for electrocatalysts due to their stability and high surface area. Their innate surface chemistries can be controlled and tuned via functionalisation to improve the stability of both the carbon support and the metal catalyst. Functionalised graphenes were prepared using either aryl diazonium functionalisation or non-destructive chemical reduction, to provide groups adapted for platinum deposition. XPS and TGA-MS measurements confirmed the presence of polyethyleneglycol and sulfur-containing functional groups, and provided consistent values for the extent of the reactions. The deposited platinum nanoparticles obtained were consistently around 2 nm via reductive chemistry and around 4 nm via the diazonium route. Although these graphene-supported electrocatalysts provided a lower electrochemical surface area (ECSA), functionalised samples showed enhanced specific activity compared to a commercial platinum/carbon black system. Accelerated stress testing (AST) showed improved durability for the functionalised graphenes compared to the non-functionalised materials, attributed to edge passivation and catalyst particle anchoring.
Date Issued
2022-10-07
Date Acceptance
2022-08-20
Citation
Journal of Materials Chemistry A, 2022, 10 (37), pp.20121-20127
ISSN
2050-7488
Publisher
Royal Society of Chemistry
Start Page
20121
End Page
20127
Journal / Book Title
Journal of Materials Chemistry A
Volume
10
Issue
37
Copyright Statement
© The Royal Society of Chemistry 2022. Open Access Article. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000854202800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
CATALYST
Chemistry
Chemistry, Physical
DESIGN
ELECTROCATALYSIS
Energy & Fuels
Materials Science
Materials Science, Multidisciplinary
PARTICLE-SIZE
Physical Sciences
PROTON
Science & Technology
Technology
Publication Status
Published
Article Number
20121
Date Publish Online
2022-08-31