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Artificial Photosynthesis - Use of a Ferroelectric Photocatalyst

Published online by Cambridge University Press:  10 May 2012

Steve Dunn  and
Matt Stock
Steve Dunn*
Affiliation:
School and Engineering and Materials, Queen Mary University of London, E1 4NS, UK
Matt Stock
Affiliation:
Cranfield University, Cranfield, MK43 0AL
*
*Email: s.c.dunn@qmul.ac.uk
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Abstract

The solid-gas phase photoassisted reduction of carbon dioxide (artificial photosynthesis) was performed using ferroelectric lithium niobate and titanium dioxide as photocatalysts. Illumination with a high pressure mercury lamp and visible sunlight showed lithium niobate achieved unexpectedly high conversion of CO2 to products despite the low levels of band gap light available and outperformed titanium dioxide under the conditions used. The high reaction efficiency of lithium niobate is explained due to its strong remnant polarization (70 μC/cm2) thought to allow longer lifetime of photo induced carriers as well as an alternative reaction pathway.

Keywords

ferroelectricphotochemicalcatalytic

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Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1446: Symposium U – Materials for Catalysis in Energy , 2012 , mrss12-1446-u02-07
Copyright
Copyright © Materials Research Society 2012

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