Comparative Study of p-type CuBi2O4 Films and CuBi2O4 Nanopillars Photocathode for High Performance Photoelectrochemical Water Splitting

Traditional thin films and nanostructure are the most reasonable candidates to build the next generation of photoelectrochemical water splitting system with outstanding optical and electrical properties. Especially the use of nanostructure arrays as photoelectrodes might complement the traditional s...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-11, Vol.1373 (1)
Main Authors: Nasori, Nasori, Rubiyanto, Agus, Endarko, Endarko
Format: Article
Language:English
Subjects:
Aluminum oxide
Arrays
Comparative studies
Electrical properties
Nanostructure
Optical properties
Photocathodes
Photoelectric effect
Photoelectric emission
Physics
Silver chloride
Surface reactions
Thin films
Water splitting
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Summary:Traditional thin films and nanostructure are the most reasonable candidates to build the next generation of photoelectrochemical water splitting system with outstanding optical and electrical properties. Especially the use of nanostructure arrays as photoelectrodes might complement the traditional semiconductor photoelectrodes in providing close transfer distance of photoinduced carriers and the increase in the surface reaction sites than thin films. Both of the reasons reduce the probability of carriers recombination and thus enhancing the photoelectrochemical performances. In this work, we demonstrated highly efficient water splitting performance of CuBi2O4 nanopillars compared to thin film CuBi2O4 photocathode. The CuBi2O4 nanopillars were fabricated by electrodeposition on anodized aluminum oxide (AAO) template. The CuBi2O4 nanopillars photocathode gave a notable improvement in photocurrent, from −0.50 to −1.50 mA cm−2 at −0.45 V vs. Ag/AgCl by the external quantum yield more than 3 times at wavelength 420 nm. Finally, the result of the study appealed that the photoelectrode based on CuBi2O4 nanostructure arrays is an encouraging system for showing efficient water splitting system under visible light.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1373/1/012016