Electron transfer behavior and water photodecomposition ability of calcined material from a cerium-S-phenylene-O-holmium-O-phenylene-S hybrid copolymer

• Published in: Journal of colloid and interface science Vol. 297; no. 2; pp. 672 - 677
• Main Authors: Matsui, Hideo, Otsuki, Keigo, Yamada, Hiroyoshi, Kawahara, Tetsuro, Yoshihara, Masakuni
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 15.05.2006; Elsevier
• Subjects: Cerium oxide–carbon cluster–holmium oxide composite material; Chemistry; Exact sciences and technology; General and physical chemistry; Two-step electron transfer; Water photodecomposition; Water photodecomposition; Cerium oxide–carbon cluster–holmium oxide composite material; Two-step electron transfer; Lanthanide compound; Water; Electron transfer; Oxides; Copolymer; Cerium oxide; Carbon; Cerium oxide-carbon cluster-holmium oxide composite material; Composite material
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2005.10.061

Calcination of a cerium-S-phenylene-O-holmium-O-phenylene-S hybrid copolymer under a vacuum gave cerium oxide–carbon cluster–holmium oxide composite material. The material calcined at 600 °C loaded with Pt particles could decompose water to H 2 and O 2 with a H 2/O 2 ratio of 2 under visible light irradiation. ESR spectral examinations of the calcined materials revealed the possibility of a two-step electron transfer in the process of CeO 2 → carbon cluster → Ho 2O 3 → Pt with an oxidation site at CeO 2 particles and a reduction site at Pt particles.