Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis

S. Wieghold, L. Nienhaus, F. L. Knoller, F. F. Schweinberger, J. J. Shepherd, J. W. Lyding, U. Heiz, M. Gruebele, F. Esch

Research output: Contribution to journalArticle

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. Ptn clusters (size distribution peaked at n = 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 clusters via plasmonic 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.

Original languageEnglish (US)
Pages (from-to)30570-30577
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume19
Issue number45
DOIs
StatePublished - Jan 1 2017

Fingerprint

Platinum
Gold
Catalysis
catalysis
platinum
Lighting
Chemical activation
activation
Nanoclusters
Methylene Blue
illumination
Surface plasmon resonance
Scanning tunneling microscopy
gold
Electronic properties
Catalyst activity
Optical properties
Metals
Decomposition
Wavelength

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Wieghold, S., Nienhaus, L., Knoller, F. L., Schweinberger, F. F., Shepherd, J. J., Lyding, J. W., ... Esch, F. (2017). Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis. Physical Chemistry Chemical Physics, 19(45), 30570-30577. https://doi.org/10.1039/c7cp04882c

Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis. / Wieghold, S.; Nienhaus, L.; Knoller, F. L.; Schweinberger, F. F.; Shepherd, J. J.; Lyding, J. W.; Heiz, U.; Gruebele, M.; Esch, F.

In: Physical Chemistry Chemical Physics, Vol. 19, No. 45, 01.01.2017, p. 30570-30577.

Research output: Contribution to journalArticle

Wieghold, S, Nienhaus, L, Knoller, FL, Schweinberger, FF, Shepherd, JJ, Lyding, JW, Heiz, U, Gruebele, M & Esch, F 2017, 'Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis', Physical Chemistry Chemical Physics, vol. 19, no. 45, pp. 30570-30577. https://doi.org/10.1039/c7cp04882c
Wieghold S, Nienhaus L, Knoller FL, Schweinberger FF, Shepherd JJ, Lyding JW et al. Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis. Physical Chemistry Chemical Physics. 2017 Jan 1;19(45):30570-30577. https://doi.org/10.1039/c7cp04882c
Wieghold, S. ; Nienhaus, L. ; Knoller, F. L. ; Schweinberger, F. F. ; Shepherd, J. J. ; Lyding, J. W. ; Heiz, U. ; Gruebele, M. ; Esch, F. / Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis. In: Physical Chemistry Chemical Physics. 2017 ; Vol. 19, No. 45. pp. 30570-30577.
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