Novel Gold Catalysts for the Oxidation of Carbon Monoxide at a Temperature far Below 0 °C

Abstract

A variety of gold catalysts can be used to catalyze the oxidation of carbon monoxide at temperatures as low as −70 °C and are stable in a moistened gas atmosphere. The novel catalysts, prepared by coprecipitation, are composed of ultra-fine gold particles and one of the oxides of 3d transition metals of group VIII, namely, Fe, Co, and Ni.

Fabrication of capped gold nanoparticles by using various amino acids

“…Nowadays, synthesis and characterisation of metal nanoparticles such as gold [1], silver [2], copper [3], etc., have been widely investigated. These nanoparticles have size-and shape-dependent properties, such as optoelectronic and physicochemical ones [4,5]; in addition, their applications in catalysis [6,7], imaging [8,9] and data storage [10] are more interested.…”

Confined Pt and CoFe2O4Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

“…[1][2][3][4][5][6] Catalytic activity of the supported catalyst is dependent on not only the size of metal NPs but also the metal-support interaction. [7][8][9][10][11][12][13] Strong metal-support interaction in which metals are anchored on active transition metal oxides such as TiO 2 , 14-19 CeO 2 , 20-24 and Fe 2 O 3 25-27 provides high activity for several reactions such as hydrogenation, [28][29][30] CO oxidation, [31][32][33][34][35] and water-gas shift reaction. [36][37][38][39] The underlying origin of the metal-support interaction and the promotional role of the active oxide supports in enhancing the catalytic activity and selectivity have thus been extensively studied.…”

Fluxionality of gold nanoparticles investigated by Born-Oppenheimer molecular dynamics

“…In particular the chemistry of small gold particles has attracted much attention and its theoretical properties have been extensively reviewed [4][5][6][7]. Such interest originates from several reasons: the special catalytic activity of small clusters as compared to larger ones [8][9][10], possible application in the building of nanoscale devices [11][12][13], the special properties as semiconductors [14,15], biosensors [16], electrodes [17] and their optical properties [16,18,19]. In general when the dimensions of metal particles are reduced to a size comparable to that of the constituent atoms, their electronic structure deviates dramatically from that of the bulk metal.…”