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Subnano‐Sized Pt–Au Alloyed Clusters as Enhanced Cocatalyst for Photocatalytic Hydrogen Evolution
Author(s) -
Cheng Ling,
Li Yuhang,
Chen Aiping,
Zhu Yihua,
Li Chunzhong
Publication year - 2019
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201900453
Subject(s) - photocatalysis , catalysis , cluster (spacecraft) , materials science , hydrogen , water splitting , adsorption , hydrogen production , chemical engineering , alloy , photocatalytic water splitting , nanotechnology , chemistry , metallurgy , organic chemistry , computer science , engineering , programming language
Photocatalytic water splitting for H 2 evolution is regarded as the most promising way to overcome the energy and environmental crisis. Pt clusters as a cocatalyst can efficiently enhance the performance of H 2 generation in most photocatalysts, but the activity is still unsatisfied. By tuning the electronic structures of materials, one can develop catalysts with enhanced activity. Here we synthesize a Pt–Au alloy with subnano size as cocatalyst on TiO 2 nanosheets for photocatalytic H 2 generation that shows an outstanding activity with a H 2 generation rate of 80.1 μmol h −1 for at least 100 h. The activity is twice than the pure Pt cocatalyst, mainly because the optimized hydrogen adsorption energy on Pt cluster is tuned by Au atoms.