The Role of Heat Generation and Fluid Flow in Plasmon-Enhanced Reduction-Oxidation Reactions

Ieng Wai Un, Yonatan Sivan

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Recently, we have shown that thermal effects play a crucial role in speeding up the rate of bond-dissociation reactions. This was done by applying a simple temperature-shifted Arrhenius law to the experimental data, corroborated with a detailed account of the heat diffusion occurring within the relevant samples and identification of errors in the temperature measurements. Here, we provide three important extensions of our previous studies. First, we analyze thermal effects in reduction-oxidation (redox) reactions, where charge transfer is an integral part of the reaction. Second, we analyze not only the spatial distribution of the temperature but also its temporal dynamics. Third, we also model the fluid convection and stirring. An analysis of two exemplary experimental studies allows us to show that thermal effects can explain the experimental data in one of the experiments (Baumberg and co-workers) but not in the other (Jain and co-workers), showing that redox reactions are not necessarily driven by nonthermal charge carriers.

Original languageEnglish
Pages (from-to)1183-1190
Number of pages8
JournalACS Photonics
Volume8
Issue number4
DOIs
StatePublished - 21 Apr 2021

Keywords

  • fluid convection
  • heat generation
  • plasmon-assisted photocatalysis
  • reduction-oxidation reactions

ASJC Scopus subject areas

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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