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Issue 19, 2017
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In situ doping of Pt active sites via Sn in double-shelled TiO2 hollow nanospheres with enhanced photocatalytic H2 production efficiency

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Abstract

A Sn4+-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 Sn2+ 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 Sn4+ 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.

Graphical abstract: In situ doping of Pt active sites via Sn in double-shelled TiO2 hollow nanospheres with enhanced photocatalytic H2 production efficiency

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Publication details

The article was received on 06 Jul 2017, accepted on 27 Aug 2017 and first published on 28 Aug 2017


Article type: Paper
DOI: 10.1039/C7NJ02435E
Citation: New J. Chem., 2017,41, 11089-11096
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    In situ doping of Pt active sites via Sn in double-shelled TiO2 hollow nanospheres with enhanced photocatalytic H2 production efficiency

    C. Zhang, Y. Zhou, Y. Zhang, S. Zhao, J. Fang and X. Sheng, New J. Chem., 2017, 41, 11089
    DOI: 10.1039/C7NJ02435E

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