Open AccessComparative Study of p-type CuBi2O4 Films and CuBi2O4 Nanopillars Photocathode for High Performance Photoelectrochemical Water Splitting
Author(s) -
Nasori Nasori,
Agus Rubiyanto,
Endarko Endarko
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1373/1/012016
Subject(s) - photocathode , nanopillar , photocurrent , water splitting , materials science , nanostructure , optoelectronics , photoelectrochemistry , anodizing , photoelectrochemical cell , semiconductor , nanotechnology , photocatalysis , electrolyte , electrochemistry , aluminium , physics , chemistry , electron , electrode , biochemistry , quantum mechanics , metallurgy , catalysis
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 CuBi 2 O 4 nanopillars compared to thin film CuBi 2 O 4 photocathode. The CuBi2O4 nanopillars were fabricated by electrodeposition on anodized aluminum oxide (AAO) template. The CuBi 2 O 4 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 CuBi 2 O 4 nanostructure arrays is an encouraging system for showing efficient water splitting system under visible light.