Visible light plasmonic heating of Au–ZnO for the catalytic reduction of CO2
- 17 May 2013
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Nanoscale
- Vol. 5 (15), 6968-6974
- https://doi.org/10.1039/c3nr02001k
Abstract
Plasmonic excitation of Au nanoparticles attached to the surface of ZnO catalysts using low power 532 nm laser illumination leads to significant heating of the catalyst and the conversion of CO2 and H2 reactants to CH4 and CO products. Temperature-calibrated Raman spectra of ZnO phonons show that intensity-dependent plasmonic excitation can controllably heat Au–ZnO from 30 to ∼600 °C and simultaneously tune the CH4 : CO product ratio. The laser induced heating and resulting CH4 : CO product distribution agrees well with predictions from thermodynamic models and temperature-programmed reaction experiments indicating that the reaction is a thermally driven process resulting from the plasmonic heating of the Au–ZnO. The apparent quantum yield for CO2 conversion under continuous wave (cw) 532 nm laser illumination is 0.030%. The Au–ZnO catalysts are robust and remain active after repeated laser exposure and cycling. The light intensity required to initiate CO2 reduction is low (∼2.5 × 105 W m−2) and achievable with solar concentrators. Our results illustrate the viability of plasmonic heating approaches for CO2 utilization and other practical thermal catalytic applications.Keywords
This publication has 50 references indexed in Scilit:
- Gold nanorods and their plasmonic propertiesChemical Society Reviews, 2012
- Plasmonic Photosensitization of a Wide Band Gap Semiconductor: Converting Plasmons to Charge CarriersNano Letters, 2011
- Highly Efficient Plasmon-Enhanced Dye-Sensitized Solar Cells through Metal@Oxide Core–Shell NanostructureACS Nano, 2011
- Water Splitting on Composite Plasmonic-Metal/Semiconductor Photoelectrodes: Evidence for Selective Plasmon-Induced Formation of Charge Carriers near the Semiconductor SurfaceJournal of the American Chemical Society, 2011
- Plasmonic Photocatalyst for H2 Evolution in Photocatalytic Water SplittingThe Journal of Physical Chemistry C, 2010
- Prospects of CO2 Utilization via Direct Heterogeneous Electrochemical ReductionThe Journal of Physical Chemistry Letters, 2010
- New Directions for the Photocatalytic Reduction of CO2: Supramolecular, scCO2 or Biphasic Ionic Liquid−scCO2 SystemsThe Journal of Physical Chemistry Letters, 2010
- Plasmon-Assisted Photocurrent Generation from Visible to Near-Infrared Wavelength Using a Au-Nanorods/TiO2 ElectrodeThe Journal of Physical Chemistry Letters, 2010
- Development of efficient photocatalytic systems for CO2 reduction using mononuclear and multinuclear metal complexes based on mechanistic studiesCoordination Chemistry Reviews, 2010
- Plasmon-induced photoelectrochemistry at metal nanoparticles supported on nanoporous TiO2Chemical Communications, 2004