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Related Experiment Video

Updated: Nov 9, 2025

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Photocatalytic Surface Restructuring in Individual Silver Nanoparticles.

Gayatri Kumari1,2, Rifat Kamarudheen1,2, Erwin Zoethout1

  • 1DIFFER-Dutch Institute for Fundamental Energy Research, De Zaale 20, 5612 AJ Eindhoven, The Netherlands.

ACS Catalysis
|April 16, 2021
PubMed
Summary
This summary is machine-generated.

Single-particle spectroscopy reveals that silver nanoparticles dynamically reshape and restructure during photocatalysis. These changes, driven by light, impact catalytic activity and enable real-time monitoring of reactions.

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Area of Science:

  • Surface science
  • Nanotechnology
  • Catalysis

Background:

  • Metal nanoparticles drive catalysis via light-induced effects like hot carriers and heat.
  • These processes alter nanoparticle structure and catalytic properties.
  • Ensemble measurements obscure individual nanoparticle changes due to sample heterogeneity.

Purpose of the Study:

  • To investigate the dynamic reshaping and surface restructuring of individual silver nanodisks.
  • To understand structure-activity relationships in plasmonic nanoparticles during photocatalysis.
  • To demonstrate the utility of single-particle spectroscopy for in situ analysis.

Main Methods:

  • Single-particle dark-field spectroscopy
  • Single-particle Raman scattering spectroscopy
  • Plasmon excitation of silver nanodisks
  • In situ analysis during CO2 hydrogenation

Main Results:

  • Silver nanoparticles undergo significant reshaping due to photothermal effects, even in inert atmospheres.
  • Transient silver clusters form on nanoparticle surfaces during photocatalytic CO2 hydrogenation, emitting light.
  • These clusters influence catalytic activity and enhance Raman detection of reaction products.

Conclusions:

  • Plasmonic silver nanoparticles exhibit dynamic structural changes during catalysis.
  • Single-particle techniques are crucial for elucidating in situ structure-activity relationships.
  • Transient cluster formation plays a key role in silver nanoparticle photocatalysis.