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Issue 107, 2015
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Fabrication and photoelectrochemical properties of silicon/nickel oxide core/shell nanowire arrays

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Abstract

A photoelectrochemical (PEC) cell made of a silicon nanowire array coated with a thin nickel oxide (NiOx) shell layer for solar water oxidation is presented. The silicon/NiOx core/shell nanowire photoanodes are fabricated by a simple and scalable one-step galvanic displacement reaction and thermal annealing. The conformal NiOx shell layer functions as an oxygen evolution catalyst to reduce the onset potential as well as a protection layer against corrosion. It was found that about 30 nanometer thick NiOx film coated p-type silicon nanowire arrays exhibited efficient water oxidation activity with stability for more than 48 h in aqueous Na2SO4 solution (pH ∼ 7). The scalability of this approach is promising for the fabrication of Si-based photoelectrodes.

Graphical abstract: Fabrication and photoelectrochemical properties of silicon/nickel oxide core/shell nanowire arrays

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Supplementary files

Article information


Submitted
03 Aug 2015
Accepted
09 Oct 2015
First published
09 Oct 2015

RSC Adv., 2015,5, 88209-88213
Article type
Paper

Fabrication and photoelectrochemical properties of silicon/nickel oxide core/shell nanowire arrays

F. Zhang, Y. Hu, X. Meng and K. Peng, RSC Adv., 2015, 5, 88209
DOI: 10.1039/C5RA13857D

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