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Oliver Merka, Prof. Dr. Detlef W. Bahnemann and Prof. Dr. Michael Wark Improved Photocatalytic Hydrogen Production by Structure Optimized Nonstoichiometric Y2Ti2O7 ChemCatChem 4

Article first published online: 13 JUL 2012 | DOI: 10.1002/cctc.201200148

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There be pyrochlores on the horizon: Cationic lattice distortion and interchange are reduced dramatically by increasing the Ti/Y ratio in the pyrochlore, Y2Ti2O7. The chemical composition changes from the “stuffed” pyrochlore Y2(Ti2−xYx)O7−0.5 x via (Y2−zTiz)(Ti2−zYz)O7 to Y2−vTi2O7−1.5 v. Reduced distortion results in exclusive occupation of the B-site by titanium, which greatly increases photocatalytic activity.

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