Low Temperature Sunlight-Powered Reduction of CO2 to CO Using a Plasmonic Au/TiO2 Nanocatalyst

Title

Low Temperature Sunlight-Powered Reduction of CO2 to CO Using a Plasmonic Au/TiO2 Nanocatalyst

 Author

Martínez Molina, Pau (TNO)
Meulendijks, Nicole (TNO)
Xu, M. (TU Delft ImPhys/Optics; TNO)
Verheijen, Marcel A. (Eindhoven University of Technology)
den Hartog, Tim (TNO; Zuyd University of Applied Science)
Buskens, Pascal (TNO)
Sastre, Francesc (TNO; University of Hasselt)

Date

2021

 Abstract

Sunlight-powered reduction of CO2 to fuels and chemicals is a promising strategy to close the carbon loop and facilitate the energy transition. In this research, we demonstrate that Au nanoparticles supported on TiO2 are an efficient plasmonic catalyst for the sunlight-powered reverse water-gas shift (rWGS) reaction. A maximum CO production rate of 429 mmol ⋅ gAu−1 ⋅ h−1 with a selectivity of 98 % and an apparent quantum efficiency of 4.7 % were achieved using mildly concentrated sunlight (1.44 W ⋅ cm−2 equals 14.4 sun). The CO production rate showed an exponential increase with increasing light intensity, suggesting that the process is mainly promoted by a photothermal effect. Thermal reference experiments with the same catalysts promoted CH4 formation, dropping the CO selectivity to 70 %. Thus, mildly concentrated sunlight can efficiently and selectively enhance the promotion of the rWGS reaction without using external heating.


 Subject

Carbon Dioxide
CO
Photochemistry
Reverse Water-Gas Shift
solar light
Surface plasmon resonance

 To reference this document use:

http://resolver.tudelft.nl/uuid:27ff5345-94af-47ab-a528-639c3ebb51b2

 DOI

https://doi.org/10.1002/cctc.202100699

 ISSN

1867-3880

 Source

ChemCatChem, 13 (21), 4507-4513

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2021 Pau Martínez Molina, Nicole Meulendijks, M. Xu, Marcel A. Verheijen, Tim den Hartog, Pascal Buskens, Francesc Sastre
Files
PDF cctc.202100699.pdf 5.24 MB
Close viewer