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Titanium–indium oxy(nitride) with and without RuO2 loading as photocatalysts for hydrogen production under visible light from water

Paper ID Volume ID Publish Year Pages File Format Full-Text
54980 47035 2013 7 PDF Available
Title
Titanium–indium oxy(nitride) with and without RuO2 loading as photocatalysts for hydrogen production under visible light from water
Abstract

Titanium–indium (oxy)nitride composite materials with and without RuO2 loadings were produced by treating TiO2–In2O3 mixed powders with ammonia at high temperature (700–850 °C) (Elemental analysis indicated an empirical formula of TiIn0.029O0.63N1.4).We have found that ammonolysis of TiO2 to form Ti (oxy)nitride or In2O3 to form In (oxy)nitride do not give composites active toward methanol–water under visible light, but TiO2 and In2O3 mixed together do give composites active toward methanol–water under visible light. Ti–In (oxy)nitride powders modified by surface loading with RuO2 nanoparticles at 3 wt% achieves the highest H2 evolution activity under visible light irradiation. The composite material did not react in the dark, but upon irradiation with visible light, the hydrogen production rate under illumination goes way up to 30 μmol h−1 and the turnover number shows that this is a photocatalytic reaction.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (146 K)Download as PowerPoint slideHighlights► Titanium–indium (oxy)nitrides as active water splitting catalysts. ► Ruthenium Oxide enhanced hydrogen generation. ► The XPS data shows Ti4+ could be reduced to 3+ and 2+ upon ammonia treatment with In2O3 presence. ► Long-lived catalyst in water/methanol.

Keywords
H2 evolution; Photocatalysts; Ru co-catalyst; Titanium dioxide; Indium oxide
First Page Preview
Titanium–indium oxy(nitride) with and without RuO2 loading as photocatalysts for hydrogen production under visible light from water
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 199, 1 January 2013, Pages 15–21
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis