Facile fabrication of an efficient oxynitride TaON photoanode for overall water splitting into H2 and O2 under visible light irradiation.
The porous oxynitride TaON film electrode prepared on conducting glass (FTO) showed significantly high quantum efficiency (IPCE = ca. 76% at 400 nm at 0.6 V vs Ag/AgCl) in an aqueous Na(2)SO(4) solution, after loading of IrO(2) x nH(2)O nanoparticles as a cocatalyst for water oxidation. Overall water splitting into H(2) and O(2) under visible light was demonstrated using an IrO(2) x nH(2)O-loaded TaON photoanode combined with a Pt electrode under an externally applied bias (0.6-1 V).
Abe
Ryu
R
Catalysis Research Center, Hokkaido University, North 21, West 10, Sapporo 001-0021, Japan. ryu-abe@cat.hokudai.ac.jp
Higashi
Masanobu
M
Domen
Kazunari
K
D004563:Electrochemistry; D004566:Electrodes; D006859:Hydrogen / Q000737:chemistry*; D007495:Iridium / Q000737:chemistry; D008027:Light; D008567:Membranes, Artificial; D010100:Oxygen / Q000737:chemistry*; D010777:Photochemistry; D016062:Porosity; D011789:Quantum Theory; D013499:Surface Properties; D013635:Tantalum / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
D008567:Membranes, Artificial; D014867:Water; C044458:iridium oxide; D007495:Iridium; D013635:Tantalum; D006859:Hydrogen; D010100:Oxygen