Rubio, Noelia;
Suter, Theo;
Rana, Zahra;
Clancy, Adam J;
Masuda, Seigo;
Au, Heather;
Coulter, Gabriel;
... Shaffer, Milo SP; + view all
(2022)
Platinum deposition on functionalised graphene for corrosion resistant oxygen reduction electrodes.
Journal of Materials Chemistry A
10.1039/d2ta03487e.
(In press).
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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.
| Type: | Article |
|---|---|
| Title: | Platinum deposition on functionalised graphene for corrosion resistant oxygen reduction electrodes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/d2ta03487e |
| Publisher version: | https://doi.org/10.1039/D2TA03487E |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10156011 |
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