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Vertically Aligned Ta 3 N 5 Nanorod Arrays for Solar‐Driven Photoelectrochemical Water Splitting
Author(s) -
Li Yanbo,
Takata Tsuyoshi,
Cha Dongkyu,
Takanabe Kazuhiro,
Minegishi Tsutomu,
Kubota Jun,
Domen Kazunari
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201202582
Subject(s) - nanorod , photocurrent , materials science , water splitting , anodizing , optoelectronics , photoelectrochemical cell , electrode , photoelectrochemistry , yield (engineering) , energy conversion efficiency , reversible hydrogen electrode , nanotechnology , chemical engineering , electrochemistry , photocatalysis , electrolyte , working electrode , catalysis , composite material , aluminium , biochemistry , chemistry , engineering
A vertically aligned Ta 3 N 5 nanorod photoelectrode is fabricated by through‐mask anodization and nitridation for water splitting. The Ta 3 N 5 nanorods, working as photoanodes of a photoelectrochemical cell, yield a high photocurrent density of 3.8 mA cm −2 at 1.23 V versus a reversible hydrogen electrode under AM 1.5G simulated sunlight and an incident photon‐to‐current conversion efficiency of 41.3% at 440 nm, one of the highest activities reported for photoanodes so far.