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Combinatorial approach to the study of particle size effects in electrocatalysis: synthesis of supported gold nanoparticles

Combinatorial approach to the study of particle size effects in electrocatalysis: synthesis of supported gold nanoparticles
Combinatorial approach to the study of particle size effects in electrocatalysis: synthesis of supported gold nanoparticles
A high-throughput method for physical vapor deposition has been applied to the synthesis of libraries of supported gold particles on amorphous substoichiometric TiOx and carbon supports. The TiOx substrate stoichiometry can be varied or kept constant across a supporting sample, and subsequent deposition of particle sizes on supports are controlled through the nucleation and growth process. TEM measurements indicate nucleation and growth of Au particles takes place, with the smallest particles initially observed at 1.4 nm with a maximum density of 5.5 X 10(12) cm(-2) on titania, and 2.6 nm with concomitantly lower density on carbon. The 1.4-nm particles on titania exhibit a binding energy shift in the Au(4f) core level of 0.3 eV from bulk gold, and the shift is similar to 0.1 eV by the time particles grow to a mean size of 2.5 nm. These shifts are associated with final state effects, and the supported gold particles are metallic and appear to be relatively stable in air. When combined with appropriate substrates and screening techniques, this method provides a highly controllable method for the high-throughput synthesis of model supported catalyst.
catalytic-activity, co oxidation, au, tio2(110), growth, temperature, titania, tio2, morphology, surface
1520-4766
791-798
Guerin, Samuel
e185e0c2-85c6-4d1c-a2cf-cd2f410d346f
Hayden, Brian E.
aea74f68-2264-4487-9d84-5b12ddbbb331
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Rendall, Michael E
76f42730-ca7d-4a29-8db2-7250e85062b4
Suchsland, Jens-Peter
3251dda4-1257-44af-b894-846ef5298133
Williams, Laura J.
98101e5d-f6cb-451c-81ae-06b1086e752e
Guerin, Samuel
e185e0c2-85c6-4d1c-a2cf-cd2f410d346f
Hayden, Brian E.
aea74f68-2264-4487-9d84-5b12ddbbb331
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Rendall, Michael E
76f42730-ca7d-4a29-8db2-7250e85062b4
Suchsland, Jens-Peter
3251dda4-1257-44af-b894-846ef5298133
Williams, Laura J.
98101e5d-f6cb-451c-81ae-06b1086e752e

Guerin, Samuel, Hayden, Brian E., Pletcher, Derek, Rendall, Michael E, Suchsland, Jens-Peter and Williams, Laura J. (2006) Combinatorial approach to the study of particle size effects in electrocatalysis: synthesis of supported gold nanoparticles. Journal of Combinatorial Chemistry, 8 (5), 791-798. (doi:10.1021/cc060040k).

Record type: Article

Abstract

A high-throughput method for physical vapor deposition has been applied to the synthesis of libraries of supported gold particles on amorphous substoichiometric TiOx and carbon supports. The TiOx substrate stoichiometry can be varied or kept constant across a supporting sample, and subsequent deposition of particle sizes on supports are controlled through the nucleation and growth process. TEM measurements indicate nucleation and growth of Au particles takes place, with the smallest particles initially observed at 1.4 nm with a maximum density of 5.5 X 10(12) cm(-2) on titania, and 2.6 nm with concomitantly lower density on carbon. The 1.4-nm particles on titania exhibit a binding energy shift in the Au(4f) core level of 0.3 eV from bulk gold, and the shift is similar to 0.1 eV by the time particles grow to a mean size of 2.5 nm. These shifts are associated with final state effects, and the supported gold particles are metallic and appear to be relatively stable in air. When combined with appropriate substrates and screening techniques, this method provides a highly controllable method for the high-throughput synthesis of model supported catalyst.

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More information

Published date: 2006
Keywords: catalytic-activity, co oxidation, au, tio2(110), growth, temperature, titania, tio2, morphology, surface

Identifiers

Local EPrints ID: 44456
URI: http://eprints.soton.ac.uk/id/eprint/44456
ISSN: 1520-4766
PURE UUID: 3f3a5895-de9d-4db0-940a-9d8eab46b013
ORCID for Brian E. Hayden: ORCID iD orcid.org/0000-0002-7762-1812

Catalogue record

Date deposited: 05 Mar 2007
Last modified: 17 Dec 2019 02:03

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