The Chemical Properties of Hydrogen Atoms Adsorbed on M0Nanoparticles Suspended inAqueous Solutions: The Case of Ag0-NPs and Au0-NPs Reduced by BD4

Alina Sermiagin, Dan Meyerstein, Ronen Bar-Ziv, Tomer Zidki

Research output: Contribution to journalComment/debate

3 Scopus citations

Abstract

The nature of H-atoms adsorbed on M0-nanoparticles is of major importance in many catalyzed reduction processes.Using isotope labeling,wedetermined that hydrogen evolution from transient {(M0-NP)-Hn}n proceeds mainly via the Heyrovsky mechanism when nislarge (i.e., the hydrogens behave as hydrides) but mainly via the Tafel mechanism when nissmall (i.e., the hydrogens behave as atoms). Additionally, the relative contributions of the two mechanisms differ considerably for M = Au and Ag. The results are analogous to those recently reported for the M0-NP-catalyzed de-halogenation processes.

Original languageEnglish
Pages (from-to)16763-16766
Number of pages4
JournalAngewandte Chemie - International Edition
Volume130
Issue number50
DOIs
StatePublished - 10 Dec 2018

Keywords

  • hydrogen evolution
  • isotopic labeling
  • nanoparticles
  • reduction mechanism
  • sodium borohydride

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (all)

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