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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS	Effects of heat treatment atmosphere on the structure and activity of Pt 3 Sn nanoparticle electrocatalysts: a characterisation case study Haoliang Huang , Abu Bakr Ahmed Amine Nassr , Veronica Celorrio , S. F. Rebecca Taylor , Vinod Kumar Puthiyapura , Christopher Hardacre , Dan J. L. Brett , Andrea E. Russell Faraday Discussions DOI: 10.1039/C7FD00221A Diamond Proposal Number(s): [10306] Open Access Show Abstract ▼ Abstract: Comprehensive identification of the phases and atomic configurations of bimetallic nanoparticle catalysts are critical in understanding structure-properties 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.	Apr 2018

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B18-Core EXAFS

Effects of heat treatment atmosphere on the structure and activity of Pt 3 Sn nanoparticle electrocatalysts: a characterisation case study

Haoliang Huang , Abu Bakr Ahmed Amine Nassr , Veronica Celorrio , S. F. Rebecca Taylor , Vinod Kumar Puthiyapura , Christopher Hardacre , Dan J. L. Brett , Andrea E. Russell

Faraday Discussions

DOI: 10.1039/C7FD00221A

Diamond Proposal Number(s): [10306]