Constructing inverse opal structured hematite photoanodes via electrochemical process and their application to photoelectrochemical water splitting
SCIE
SCOPUS
- Title
- Constructing inverse opal structured hematite photoanodes via electrochemical process and their application to photoelectrochemical water splitting
- Authors
- Shi, X; Zhang, K; Shin, K; Moon, JH; Lee, TW; Park, JH
- Date Issued
- 2013-01
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- In this study, we constructed an inverse opal structured hematite (IOS alpha-Fe2O3) as the photoanode of a photoelectrochemical (PEC) cell for efficient solar water splitting via a simple electrochemical process. At the same time, a series of affecting factors (template particle size, electrodeposition time and annealing temperature) to construct the IOS alpha-Fe2O3 photoanode on the photoelectrochemical water splitting were considered. Optimized PEC efficiency was observed for the IOS alpha-Fe2O3 photoanode annealed at 400 degrees C using the 250 nm sized-polystyrene (PS) colloid template and 9 minutes of electrodeposition time for the given specific Fe precursor solution. This resulted in the highest photocurrent density compared to other crossed conditions, which significantly achieved 3.1 mA cm(-2) at 0.5 V vs. Ag/AgCl reference electrode. The synthesis of the IOS alpha-Fe2O3 via an easy-to-control electrochemical process is described for first time that opens a possibility for constructing other oxide semiconductor photoanodes (not only well-known Si, Ti and Zr) with inverse opal structure.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/11911
- DOI
- 10.1039/C3CP50459J
- ISSN
- 1463-9076
- Article Type
- Article
- Citation
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS, vol. 15, no. 28, page. 11717 - 11722, 2013-01
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