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Effects of heat treatment atmosphere on the structure and activity of Pt3Sn nanoparticle electrocatalysts: a characterisation case study

Effects of heat treatment atmosphere on the structure and activity of Pt3Sn nanoparticle electrocatalysts: a characterisation case study
Effects of heat treatment atmosphere on the structure and activity of Pt3Sn nanoparticle electrocatalysts: a characterisation case study
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.
0301-7249
Huang, Haoliang
132a8eda-b800-4fa7-9583-6b4306f30247
Nassr, Abu Bakr Ahmed Amine
e7459341-3f6a-4bf0-a54e-5eda1c521649
Celorrio, Veronica
5ebb7fb5-a74c-4872-9795-5830dc915d0b
Taylor, S.F. Rebecca
ee19946e-25ea-420b-80ac-8dfe226c843b
Puthiyapura, Vinod Kumar
4787348f-d97a-4288-a9a7-b0c61866f823
Hardacre, Christopher
0715f59a-c82e-4844-a9f8-6a06fb36320f
Brett, Dan J.L.
652e18b5-dad8-4dc4-bed4-9810052ad27b
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Huang, Haoliang
132a8eda-b800-4fa7-9583-6b4306f30247
Nassr, Abu Bakr Ahmed Amine
e7459341-3f6a-4bf0-a54e-5eda1c521649
Celorrio, Veronica
5ebb7fb5-a74c-4872-9795-5830dc915d0b
Taylor, S.F. Rebecca
ee19946e-25ea-420b-80ac-8dfe226c843b
Puthiyapura, Vinod Kumar
4787348f-d97a-4288-a9a7-b0c61866f823
Hardacre, Christopher
0715f59a-c82e-4844-a9f8-6a06fb36320f
Brett, Dan J.L.
652e18b5-dad8-4dc4-bed4-9810052ad27b
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169

Huang, Haoliang, Nassr, Abu Bakr Ahmed Amine, Celorrio, Veronica, Taylor, S.F. Rebecca, Puthiyapura, Vinod Kumar, Hardacre, Christopher, Brett, Dan J.L. and Russell, Andrea E. (2018) Effects of heat treatment atmosphere on the structure and activity of Pt3Sn nanoparticle electrocatalysts: a characterisation case study. Faraday Discussions. (doi:10.1039/C7FD00221A).

Record type: Article

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.

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Accepted/In Press date: 15 February 2018
e-pub ahead of print date: 16 April 2018

Identifiers

Local EPrints ID: 421733
URI: http://eprints.soton.ac.uk/id/eprint/421733
ISSN: 0301-7249
PURE UUID: 3afd2cdb-772c-4deb-b98d-838b8f0f5da3
ORCID for Andrea E. Russell: ORCID iD orcid.org/0000-0002-8382-6443

Catalogue record

Date deposited: 26 Jun 2018 16:30
Last modified: 07 Oct 2020 05:55

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