Journal article
Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis
Physical chemistry chemical physics : PCCP, Vol.19(45), pp.30570-30577
2017
DOI: 10.1039/C7CP04882C
PMID: 29115312
Abstract
Nanometer-sized metal clusters are prime candidates for photoactivated catalysis, based on their unique tunable optical and electronic properties, combined with a large surface-to-volume ratio. Due to the very small optical cross sections of such nanoclusters, support-mediated plasmonic activation could potentially make activation more efficient. Our support is a semi-transparent gold film, optimized to work in a back-illumination geometry. It has a surface plasmon resonance excitable in the 510–540 nm wavelength range. Ptnclusters (size distribution peaked atn= 46 atoms) have been deposited onto this support and investigated for photoactivated catalytic performance in the oxidative decomposition of methylene blue. The Pt cluster catalytic activity under illumination exceeds that of the gold support by more than an order of magnitude per active surface area. To further investigate the underlying mechanism of plasmon-induced catalysis, the clusters have been imaged with optically-assisted scanning tunneling microscopy under illumination. The photoactivation of the Pt clustersviaplasmonic excitation of the support and subsequential electronic excitation of the clusters can be imaged with nanometer resolution. The light-induced tunneling current on the clusters is enhanced relative to the gold film support.
Details
- Title: Subtitle
- Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis
- Creators
- S Wieghold - Department of Chemistry and Catalysis Research Center, Technische Universität München, 85748 Garching, GermanyL Nienhaus - Beckman Institute for Advanced Science and Technology, Urbana, USA, Department of Chemistry, University of IllinoisF. L Knoller - Department of Chemistry and Catalysis Research Center, Technische Universität München, 85748 Garching, GermanyF. F Schweinberger - Department of Chemistry and Catalysis Research Center, Technische Universität München, 85748 Garching, GermanyJ. J Shepherd - Chemistry Building, University of Iowa, Iowa City, USAJ. W Lyding - Beckman Institute for Advanced Science and Technology, Urbana, USA, Department of Electrical and Computer Engineering, University of IllinoisU Heiz - Department of Chemistry and Catalysis Research Center, Technische Universität München, 85748 Garching, GermanyM Gruebele - Beckman Institute for Advanced Science and Technology, Urbana, USA, Department of Chemistry, University of IllinoisF Esch - Department of Chemistry and Catalysis Research Center, Technische Universität München, 85748 Garching, Germany
- Resource Type
- Journal article
- Publication Details
- Physical chemistry chemical physics : PCCP, Vol.19(45), pp.30570-30577
- DOI
- 10.1039/C7CP04882C
- PMID
- 29115312
- ISSN
- 1463-9076
- eISSN
- 1463-9084
- Grant note
- DOI: 10.13039/501100001659, name: Deutsche Forschungsgemeinschaft, award: ES349/1-1, ES349/1-2, HE3454/18-1, HE3454/18-2, HE3454/23-1; DOI: 10.13039/100000001, name: National Science Foundation, award: CHE and DMR; DOI: 10.13039/501100000700, name: Royal Commission for the Exhibition of 1851, award: Research Fellowship
- Language
- English
- Date published
- 2017
- Academic Unit
- Chemistry
- Record Identifier
- 9983985888002771
Metrics
17 Record Views