Basic Research of Water Photolysis Using Pyrochlore Oxides
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.
Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki
N. Mori et al., "Basic Research of Water Photolysis Using Pyrochlore Oxides", Key Engineering Materials, Vol. 388, pp. 297-300, 2009