Open AccessSynthesis of a single-crystal Fe 2 O 3 nanowire array based on stress-induced atomic diffusion used for solar water splitting
Author(s) -
Yiyuan Xie,
Yang Ju,
Yuhki Toku,
Yasuyuki Morita
Publication year - 2018
Publication title -
royal society open science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 51
ISSN - 2054-5703
DOI - 10.1098/rsos.172126
Subject(s) - photocurrent , nanowire , materials science , single crystal , electrode , water splitting , crystal (programming language) , diffusion , polishing , analytical chemistry (journal) , optoelectronics , crystallography , chemistry , catalysis , composite material , biochemistry , physics , chromatography , photocatalysis , computer science , programming language , thermodynamics
In this study, we successfully fabricated a single-crystal Fe 2 O 3 nanowire array based on stress-induced atomic diffusion and used this array as the photoelectrode for solar water splitting. With the surface polishing treatment on the sample surface, the density of the Fe 2 O 3 nanowire array reached up to 28.75 wire µm −2 when heated for 90 min at 600°C. The photocurrent density of the optimized sample was 0.9 mA cm −2 at 1.23 V versus a reversible hydrogen electrode in a three-electrode system under AM 1.5 G illumination. The incident photon-to-electron conversion efficiency was 6.8% at 400 nm.