Catalytic activation of a solid oxide in electronic contact with gold nanoparticles

Mayank Behl, Prashant Jain

Research output: Contribution to journalArticle

Abstract

Although inert in its bulk form, nanostructured gold supported on oxides has been found to be catalytically active. In many cases, the oxide promotes the activity of Au. It is now shown that in turn, nanoscale Au particles can chemically activate the solid oxide. Specifically, it was discovered that 4 nm Au nanoparticles deposited on zinc oxide catalyze the transformation of the oxide into the sulfide in the presence of an organosulfur species. Contact of the oxide with Au nanoparticles lowers the activation barrier for the solid-state reaction by approximately 20 kJ mol-1, allowing the reaction to be achieved closer to ambient temperatures. Electron transfer from oxygen vacancies to Au nanoparticles is proposed to generate acidic sites on the surface of the zinc oxide, resulting in the enhanced reactivity of the oxide. Knowledge of such electronic interactions between the noble metal and oxide can be exploited for engineering reactive heterostructures for low-temperature pollutant sorption and hydrocarbon processing.

Original languageEnglish (US)
Pages (from-to)992-997
Number of pages6
JournalAngewandte Chemie - International Edition
Volume54
Issue number3
DOIs
StatePublished - Jan 12 2015

Fingerprint

Gold
Oxides
Chemical activation
Nanoparticles
Zinc Oxide
Zinc oxide
Sulfides
Oxygen vacancies
Precious metals
Hydrocarbons
Solid state reactions
Heterojunctions
Sorption
Temperature
Electrons
Processing

Keywords

  • Gold
  • Heterostructures
  • Nanoparticles
  • Surface chemistry
  • Synergistic effects
  • Zinc oxide

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Catalytic activation of a solid oxide in electronic contact with gold nanoparticles. / Behl, Mayank; Jain, Prashant.

In: Angewandte Chemie - International Edition, Vol. 54, No. 3, 12.01.2015, p. 992-997.

Research output: Contribution to journalArticle

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