Noble-Metal-Free Photocatalytic Hydrogen Evolution Activity: The Impact of Ball Milling Anatase Nanopowders with TiH₂

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• 作者：Xuemei Zhou ; Ning Liu ; Jochen Schmidt ; Axel Kahnt ; Andres Osvet ; Stefan Romeis ; Eva M. Zolnhofer ; Venkata Ramana Reddy Marthala ; Dirk M. Guldi ; Wolfgang Peukert ; Martin Hartmann ; Karsten Meyer and Patrik Schmuki
• 刊名：Advanced Materials
• 出版年：2017
• 出版时间：February 2, 2017
• 年：2017
• 卷：29
• 期：5
• 全文大小：1887K
• ISSN：1521-4095

文摘

Ball milling TiO₂ anatase together with TiH₂ can create an effective photocatalyst. The process changes the lattice and electronic structure of anatase. Lattice deformation created by mechanical impact combined with hydride incorporation yield electronic gap-states close to the conduction band of anatase. These provide longer lifetimes of photogenerated charge carriers and lead to an intrinsic cocatalytic activation of anatase for H₂ evolution.