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Low‐temperature catalytic activity of CO oxidation by uni‐size Pt 30 cluster disks bonded to silicon substrate
Author(s) -
Yasumatsu Hisato,
Fukui Nobuyuki
Publication year - 2014
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.21987
Subject(s) - substrate (aquarium) , silicon , catalysis , cluster (spacecraft) , desorption , monatomic ion , thermal desorption spectroscopy , chemistry , materials science , oxygen , x ray photoelectron spectroscopy , analytical chemistry (journal) , chemical engineering , adsorption , optoelectronics , organic chemistry , oceanography , computer science , engineering , programming language , geology
We investigated catalytic activity of CO oxidation by monatomic‐layered cluster disks, Pt 30 , bonded to a silicon substrate by means of ultrahigh‐sensitive temperature‐programmed desorption (TPD) mass‐spectrometry. It was found in the repeated TPD measurements with various reactant‐exposure amounts that this cluster‐substrate system possesses high ability of low‐temperature reductive activation of oxygen molecules, which is the rate‐determining step of the CO oxidation. This high‐performance is explained in terms of negative charges accumulated at a subnano interface between the cluster disk and the silicon substrate surface.