In situ doping of Pt active sites via Sn in double-shelled TiO2 hollow nanospheres with enhanced photocatalytic H2 production efficiency. (6th September 2017)

• Record Type: Journal Article
• Authors: Zhang, Chao; Zhou, Yuming; Zhang, Yiwei; Zhao, Shuo; Fang, Jiasheng; Sheng, Xiaoli
• Is Part Of: New journal of chemistry. Volume 41:Number 19(2017)
• Page Start: 11089
• Page End: 11096
• Publication Date: 2017-09-06
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c7nj02435e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A Sn 4+ -doped double-shelled Pt/TiO2 hollow nanocatalyst (DHS-SnPt) with excellent photocatalytic H2 production efficiency was prepared successfully via a facile hydrothermal method. Abstract : A Sn 4+ -doped double-shelled Pt/TiO2 hollow nanocatalyst (DHS-SnPt) with excellent photocatalytic H2 production efficiency was prepared successfully via a facile hydrothermal method. In the catalytic system, Pt active sites were in situ reduced by Sn 2+ and showed an enhanced interaction with Sn species. The enhanced SnO2 /Pt interface could accelerate the migration rate of e − from SnO2 to Pt, improving the charge separation efficiency of h + and e − . The as prepared DHS-SnPt contained a very low Pt content (0.24 wt%) and showed the highest photocatalytic H2 production efficiency ( ca. 18 496 μmol g −1 within 3 h), nearly 5.8 and 1.678 times as high as that of a pure double-shelled Pt/TiO2 hollow nanocatalyst and the traditional Sn 4+ doped counterpart, respectively, demonstrating the significantly improved Pt atom utilization of DHS-SnPt in photocatalytic H2 evolution activity. On the basis of experimental results, a possible photocatalytic H2 production mechanism was proposed to explain the excellent H2 production efficiency of DHS-SnPt.