Huang, H;
Nassr, ABAA;
Celorrio, V;
Taylor, SFR;
Puthiyapura, VK;
Hardacre, C;
Brett, DJL;
(2018)
Effects of heat treatment atmosphere on the structure and activity of Pt₃Sn nanoparticle electrocatalysts: a characterisation case study.
Faraday Discussions
, 208
pp. 555-573.
10.1039/c7fd00221a.
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Abstract
Comprehensive identification of the phases and atomic configurations of bimetallic nanoparticle catalysts are critical in understanding structure–property relationships in catalysis. However, control of the structure, whilst retaining the same composition, is challenging. Here, the same carbon supported Pt₃Sn catalyst is annealed under air, Ar and H₂ resulting in variation of the extent of alloying of the two components. The atmosphere-induced extent of alloying is characterised using a variety of methods including TEM, XRD, XPS, XANES and EXAFS and is defined as the fraction of Sn present as Sn⁰ (XPS and XANES) or the ratio of the calculated composition of the bimetallic particle to the nominal composition according to the stoichiometric ratio of the preparation (TEM, XRD and EXAFS). The values obtained depend on the structural method used, but the trend air < Ar < H₂ annealed samples is consistent. These results are then used to provide insights regarding the electrocatalytic activity of Pt₃Sn catalysts for CO, methanol, ethanol and 1-butanol oxidation and the roles of alloyed Sn and SnO₂.
| Type: | Article |
|---|---|
| Title: | Effects of heat treatment atmosphere on the structure and activity of Pt₃Sn nanoparticle electrocatalysts: a characterisation case study |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c7fd00221a |
| Publisher version: | https://doi.org/10.1039/c7fd00221a |
| Language: | English |
| Additional information: | © The Royal Society of Chemistry 2018. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (https://creativecommons.org/licenses/by/3.0/). |
| Keywords: | Bimetallic nanoparticle catalysts, Pt₃Sn catalyst, Heat treatment atmosphere |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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 UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10050329 |
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