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

Kiss Borbala | Zendy; Didier Christophe | Zendy; Johnson Timothy | Zendy; Manning Troy D. | Zendy; Dyer Matthew S. | Zendy; Cowan Alexander J. | Zendy; Claridge John B. | Zendy; Darwent James R. | Zendy; Rosseinsky Matthew J. | Zendy

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

Author(s) -

Kiss Borbala,

Didier Christophe,

Johnson Timothy,

Manning Troy D.,

Dyer Matthew S.,

Cowan Alexander J.,

Claridge John B.,

Darwent James R.,

Rosseinsky Matthew J.

Publication year - 2014

Publication title -

angewandte chemie

Language(s) - English

Resource type - Journals

eISSN - 1521-3757

pISSN - 0044-8249

DOI - 10.1002/ange.201407179

Subject(s) - rhodium , photocatalysis , yttrium , pyrochlore , materials science , dopant , oxide , visible spectrum , titanate , water splitting , irradiation , photochemistry , inorganic chemistry , ceramic , chemistry , catalysis , doping , metallurgy , organic chemistry , optoelectronics , nuclear physics , physics , phase (matter)

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

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