Cobalt phosphate-modified barium-doped tantalum nitride nanorod photoanode with 1.5% solar energy conversion efficiency

被引:284
作者
Li, Yanbo [1 ]
Zhang, Li [1 ]
Torres-Pardo, Almudena [2 ]
Gonzalez-Calbet, Jose M. [2 ]
Ma, Yanhang [3 ]
Oleynikov, Peter [3 ]
Terasaki, Osamu [3 ,4 ]
Asahina, Shunsuke [5 ]
Shima, Masahide [5 ]
Cha, Dongkyu [6 ]
Zhao, Lan [6 ]
Takanabe, Kazuhiro [6 ]
Kubota, Jun [1 ]
Domen, Kazunari [1 ]
机构
[1] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan
[2] Univ Complutense, Fac Quim, Dept Quim Inorgan, E-28040 Madrid, Spain
[3] Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden
[4] Korea Adv Inst Sci & Technol, WCU, Grad Sch EEWS, Taejon 305701, South Korea
[5] JEOL Ltd, SM Applicat Grp, Tokyo 1968558, Japan
[6] KAUST, KAUST Catalysis Ctr, Div Phys Sci & Engn, Thuwal 239556900, Saudi Arabia
基金
日本科学技术振兴机构; 日本学术振兴会;
关键词
OXYGEN-EVOLVING CATALYST; TA3N5 NANOTUBE ARRAYS; WATER OXIDATION; PHOTOCATHODE; DEPOSITION; TAON; NA;
D O I
10.1038/ncomms3566
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Spurred by the decreased availability of fossil fuels and global warming, the idea of converting solar energy into clean fuels has been widely recognized. Hydrogen produced by photoelectrochemical water splitting using sunlight could provide a carbon dioxide lean fuel as an alternative to fossil fuels. A major challenge in photoelectrochemical water splitting is to develop an efficient photoanode that can stably oxidize water into oxygen. Here we report an efficient and stable photoanode that couples an active barium-doped tantalum nitride nanostructure with a stable cobalt phosphate co-catalyst. The effect of barium doping on the photoelectrochemical activity of the photoanode is investigated. The photoanode yields a maximum solar energy conversion efficiency of 1.5%, which is more than three times higher than that of state-of-the-art single-photon photoanodes. Further, stoichiometric oxygen and hydrogen are stably produced on the photoanode and the counter electrode with Faraday efficiency of almost unity for 100 min.
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页数:7
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