Photo-assisted sequential assembling of uniform metal nanoclusters on semiconductor support

iScience

卷:25

Lei Huang¹  Can Li²  Wentao Jiang²  Liyi Shi²  Haocheng Wu²  Rengui Li³ 

[1] Corresponding author;

[2] Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, P. R. China;

[3] State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China;

关键词: Catalysis;    Optical materials;    Materials science;    Materials chemistry;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Dispersing metal nanoclusters on the oxide supports is attracting close attention in heterogeneous catalysis, but great challenges still lie in controlling the size and dispersion of nanoclusters due to the inevitable agglomeration. Here, we propose a sequential photochemical deposition strategy named “first store, and then release” to uniformly fabricate the size-controlling noble metal nanoclusters on semiconductor oxides. Using the typical semiconductor TiO2, the photoexcited electrons can be first stored as reduced species (e.g. Ti3+) under irradiation and the Ti3+ species can optimize both the nucleation and growth processes in dark reaction, resulting in a uniform dispersing of various noble metals (Au, Pt, Ag etc.) with size diameters of ∼1 nm. The nanoclusters catalysts exhibited superior performance in catalytic oxidation of HCHO compared with that of nanoparticles. This work brings a new and useful strategy to construct size-controlling noble metals on the oxide supports for heterogeneous catalysis and the related fields.

【 授权许可】

Unknown