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CO Oxidation Promoted by the Gold Dimer in Au 2 VO 3 − and Au 2 VO 4 − Clusters
Author(s) -
Wang LiNa,
Li ZiYu,
Liu QingYu,
Meng JingHeng,
He ShengGui,
Ma TongMei
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201505476
Subject(s) - catalysis , chemistry , dimer , reactivity (psychology) , cluster (spacecraft) , vanadium , transition metal , vanadium oxide , inorganic chemistry , redox , oxygen , metal , ion , polyoxometalate , crystallography , medicine , alternative medicine , organic chemistry , biochemistry , pathology , computer science , programming language
Investigations on the reactivity of atomic clusters have led to the identification of the elementary steps involved in catalytic CO oxidation, a prototypical reaction in heterogeneous catalysis. The atomic oxygen species O .− and O 2− bonded to early‐transition‐metal oxide clusters have been shown to oxidize CO. This study reports that when an Au 2 dimer is incorporated within the cluster, the molecular oxygen species O 2 2− bonded to vanadium can be activated to oxidize CO under thermal collision conditions. The gold dimer was doped into Au 2 VO 4 − cluster ions which then reacted with CO in an ion‐trap reactor to produce Au 2 VO 3 − and then Au 2 VO 2 − . The dynamic nature of gold in terms of electron storage and release promotes CO oxidation and OO bond reduction. The oxidation of CO by atomic clusters in this study parallels similar behavior reported for the oxidation of CO by supported gold catalysts.