Photocatalytic Water Oxidation by a Pyrochlore Oxide upon Irradiation with Visible Light: Rhodium Substitution Into Yttrium Titanate1. (2nd December 2014)

• Record Type: Journal Article
• Authors: Kiss, Borbala; Didier, Christophe; Johnson, Timothy; Manning, Troy D.; Dyer, Matthew S.; Cowan, Alexander J.; Claridge, John B.; Darwent, James R.; Rosseinsky, Matthew J.
• Is Part Of: Angewandte Chemie. Volume 126:Number 52(2014)
• Page Start: 14708
• Page End: 14712
• Publication Date: 2014-12-02
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201407179
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A stable visible‐light‐driven photocatalyst (<italic>λ</italic>≥450 nm) for water oxidation is reported. Rhodium substitution into the pyrochlore Y₂Ti₂O₇ is demonstrated by monitoring Vegard′s law evolution of the unit‐cell parameters with changing rhodium content, to a maximum content of 3 % dopant. Substitution renders the solid solutions visible‐light active. The overall rate of oxygen evolution is comparable to WO₃ but with superior light‐harvesting and surface‐area‐normalized turnover rates, making Y₂Ti_1.94Rh_0.06O₇ an excellent candidate for use in a Z‐scheme water‐splitting system.</p> </abstract>