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Photoelectrochemical Oxidation of Water Using BaTaO2N Photoanodes Prepared by Particle Transfer Method
Koichiro Ueda ,
Tsutomu Minegishi ,
Justin Clune ,
Mamiko Nakabayashi ,
Takashi Hisatomi ,
Hiroshi Nishiyama ,
Masao Katayama ,
Naoya Shibata ,
Jun Kubota ,
Taro Yamada ,
Kazunari Domen
February 09 2015
February 06 2015
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Abstract
A photoanode of particulate BaTaO2N fabricated by the particle transfer method and
modified with a Co cocatalyst generated a photocurrent of 4.2 mA cm(-2) at 1.2 V(RHE)
in the photoelectrochemical water oxidation reaction under simulated sunlight (AM1.5G).
The half-cell solar-to-hydrogen conversion efficiency (HC-STH) of the photoanode reached
0.7% at 1.0 V(RHE), which was an order of magnitude higher than the previously reported
photoanode made from the same material. The faradaic efficiency for oxygen evolution
from water was virtually 100% during the reaction for 6 h, attesting to the robustness
of the oxynitride.