Hydrogenated Anatase: Strong Photocatalytic Dihydrogen Evolution without the Use of a Co‐Catalyst1. (19th October 2014)

• Record Type: Journal Article
• Authors: Liu, Ning; Schneider, Christopher; Freitag, Detlef; Venkatesan, Umamaheswari; Marthala, V. R. Reddy; Hartmann, Martin; Winter, Benjamin; Spiecker, Erdmann; Osvet, Andres; Zolnhofer, Eva M.; Meyer, Karsten; Nakajima, Tomohiko; Zhou, Xuemei; Schmuki, Patrik
• Is Part Of: Angewandte Chemie. Volume 126:Number 51(2014)
• Page Start: 14425
• Page End: 14429
• Publication Date: 2014-10-19
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201408493
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The high‐pressure hydrogenation of commercially available anatase or anatase/rutile TiO₂ powder can create a photocatalyst for H₂ evolution that is highly effective and stable without the need for any additional co‐catalyst. This activation effect cannot be observed for rutile; however, for anatase/rutile mixtures, a strong synergistic effect can be found (similar to results commonly observed for noble‐metal‐decorated TiO₂). EPR and PL measurements indicated the intrinsic co‐catalytic activation of anatase TiO₂ to be due to specific defect centers formed during hydrogenation. These active centers can be observed specifically for high‐pressure hydrogenation; other common reduction treatments do not result in this effect.</p> </abstract>