Basic Research of Water Photolysis Using Pyrochlore Oxides

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Photocatalytic proton reduction and water oxidation have been studied in a tris(2,2’-bipyridyl)ruthenium complex-catalyst system. Pyrochlore-type oxides have been used as proton reduction catalysts with a sacrificial electron donor (Na2EDTA) at pH 7 and as water oxidation catalysts with a sacrificial electron acceptor (K2S2O8) at pH 3. Rate constants for the proton reduction were estimated on the basis of photochemical processes. Yb2Ru2O7-δ was found to be the most active catalyst for proton reduction and water oxidation catalyst in this system.

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Edited by:

Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki

Pages:

297-300

Citation:

N. Mori et al., "Basic Research of Water Photolysis Using Pyrochlore Oxides", Key Engineering Materials, Vol. 388, pp. 297-300, 2009

Online since:

September 2008

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$41.00

[1] B.V. Koryakin, T.S. Dzhabiev and A.E. Shilov, Dokl. Akad. Nauk. SSSR, 238 (1977) p.620.

[2] K. Kalyanasundaram, J. Kiwi and M. Grätzel, Helv. Chim. Acta, 61 (1978) p.2720.

[3] A. Harriman and A. Mills, J. Chem. Soc., Faraday Trans. 2, 77 (1981) p.2111.

[4] H. Shiroishi, T. Shoji and M. Kaneko, J. Mol. Catal. A: Chem., 187 (2002) p.47.

[5] A. Harriman, G. Porter and P. Walters, J. Chem. Soc., Faraday Trans. 2, 77 (1988) p.2373.

[6] A. Harriman, I.J. Pickering, J.M. Thomas and P.A. Christensen, J. Chem. Soc., Faraday Trans. 1, 84 (1988) p.2795.

[7] M. Hara, C.C. Waraksa, J.T. Lean, B.A. Lewis and T.E. Mallouk, J. Phys. Chem. A, 104 (2000) p.5275.

[8] H. Shiroishi, M. Nukaga, S. Yamashita and M. Kaneko, Chem. Lett., 31 (2002) p.488.