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Gold Nanoparticles Supported on Mesoporous Titania Thin Films with High Loading as a CO Oxidation Catalyst
Author(s) -
Akita Shingo,
Amemiya Makoto,
Matsumoto Takanori,
Jikihara Yohei,
Nakayama Tsuruo,
Hossain Md. Shahriar A.,
Kani Kenya,
Ishii Daisuke,
Islam Md. Tofazzal,
Jiang Xiangfen,
Fatehmulla Amanullah,
Farooq Wazirzada Aslam,
Bando Yoshio,
Malgras Victor,
Yamauchi Yusuke
Publication year - 2017
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.201700080
Subject(s) - mesoporous material , calcination , materials science , catalysis , chemical engineering , dispersity , nanoparticle , colloidal gold , substrate (aquarium) , nanotechnology , reactivity (psychology) , thin film , chemistry , organic chemistry , polymer chemistry , oceanography , geology , engineering , medicine , alternative medicine , pathology
In the present work, 2.4 nm gold nanoparticles (Au NPs) are uniformly dispersed on mesoporous titania thin films which are structurally tuned by controlling the calcination temperature. The gold content of the catalyst is as high as 27.8 wt %. To our knowledge, such a high loading of Au NPs with good dispersity has not been reported until now. Furthermore, the reaction rate of the gold particles is enhanced by one order of magnitude when supported on mesoporous titania compared to non‐porous titania. This significant improvement can be explained by an increase in the diffusivity of the substrate due to the presence of mesopores, the resistance to agglomeration, and improved oxygen activation.