Sandwich Fe2O3/Au/Fe2O3 photoanodes for enhanced photoelectrochemical water splitting
Boey, Freddy Yin Chiang
Loo, Say Chye Joachim
Date of Issue2013
International Conference on Environmental Pollution and Remediation (3rd : 2013 : Toronto, Canada)
School of Materials Science and Engineering
Solar water splitting has received increasing attentions in recent years as a very promising strategy to produce clean hydrogen fuels. This paper presents a novel design consisting of a sandwich structure of Fe2O3/Au/Fe2O3 as the photoanode for photoelectrochemical (PEC) water splitting. The tandem layers are constructed by spin-coating of pre-synthesized Fe2O3 nanoparticles and sputtering of the gold intermediate layer. PEC testing shows that the sandwich structure exhibits much higher photocurrent density as compared to the Fe2O3 double-layer anode. Further studies indicate that the Au intermediate layer can contribute in electron transfer as well as light harvesting due to its plasmonic excitation. The mechanism of the photocurrent enhancement is proposed and such sandwich structure may be applied to other semiconductors to improve PEC performance.
© 2013 International ASET Inc. This paper was published in 3rd International Conference on Environmental Pollution and Remediation and is made available as an electronic reprint (preprint) with permission of International ASET Inc. The paper can be found at the following official URL: [http://avestia.com/ICEPR2013_Proceedings/list_of_papers.html]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.