New insights into HER catalysis: The effect of nano-silica support on catalysis by silver nanoparticles

Gifty Sara Rolly, Dan Meyerstein, Guy Yardeni, Ronen Bar-Ziv, Tomer Zidki

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Supported metal catalysts have recently attracted considerable attention in the field of catalysis. The effect of surface chemical groups (SiO-/SiOH2+) on SiO2-Ag0-NPs along with the average negative charge induced by (CH3)2COH radicals on the catalytic reduction of H2O/H3O+ towards the hydrogen evolution reaction (HER) is reported. The results indicate that similar effects are observed both above and below the point of zero charge (PZC) of silica. More importantly, it is shown that a high concentration of this catalyst does not necessarily contribute to boosting the hydrogen formation, but instead, the density of charge on its surface is a decisive factor. A mechanistic explanation of the observed effect is given.

Original languageEnglish
Pages (from-to)6401-6405
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume22
Issue number11
DOIs
StatePublished - 21 Mar 2020

ASJC Scopus subject areas

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

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