Vertically Aligned Ta<sub>3</sub>N<sub>5</sub> Nanorod Arrays for Solar‐Driven Photoelectrochemical Water Splitting

Yanbo Li(The University of Tokyo), Tsuyoshi Takata(The University of Tokyo), Dongkyu Cha(King Abdullah University of Science and Technology), Kazuhiro Takanabe(King Abdullah University of Science and Technology), Tsutomu Minegishi(The University of Tokyo), Jun Kubota(The University of Tokyo), Kazunari Domen(The University of Tokyo)
Advanced Materials
September 18, 2012
10.1002/adma.201202582
Cited by 404

Abstract

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.

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