Photocatalytic Water Oxidation by a Pyrochlore Oxide upon Irradiation with Visible Light: Rhodium Substitution Into Yttrium Titanate

Kiss, Borbala, Didier, Christophe, Johnson, Timothy, Manning, Troy D ORCID: 0000-0002-7624-4306, Dyer, Matthew S ORCID: 0000-0002-4923-3003, Cowan, Alexander J ORCID: 0000-0001-9032-3548, Claridge, John B ORCID: 0000-0003-4849-6714, Darwent, James R and Rosseinsky, Matthew J ORCID: 0000-0002-1910-2483 (2014) Photocatalytic Water Oxidation by a Pyrochlore Oxide upon Irradiation with Visible Light: Rhodium Substitution Into Yttrium Titanate ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 53 (52). pp. 14480-14484. ISSN 1433-7851, 1521-3773

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Abstract

A stable visible-light-driven photocatalyst (λ ≥ 450 nm) for water oxidation is reported. Rhodium substitution into the pyrochlore Y<inf>2</inf>Ti<inf>2</inf>O<inf>7</inf> 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 WO<inf>3</inf> but with superior light-harvesting and surface-areanormalized turnover rates, making Y<inf>2</inf>Ti<inf>1.94</inf>Rh<inf>0.06</inf>O<inf>7</inf> an excellent candidate for use in a Z-scheme water-splitting system.

Item Type:	Article
Uncontrolled Keywords:	photocatalysis, pyrochlore, rhodium, titanates, water splitting
Depositing User:	Symplectic Admin
Date Deposited:	20 Mar 2017 07:26
Last Modified:	16 Jun 2026 10:23
DOI:	10.1002/anie.201407179
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3006505
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