Effect of calcination temperatures and precipitant on the catalytic performance of Au/ZnO catalysts for CO oxidation at ambient temperature and in humid circumstances

Preferential oxidation of CO in H2 stream on Au/ZnO–TiO2 catalysts

“…TiO 2 obtained from Evonik Degussa comprises of 75% anatase and 25% rutile. Figs [29]. In this study, the calcination temperature was at 180 C. Our results are in accordance with literature data [29].…”

“…ZnO as a support material for Au was shown to be essential to obtain a high selectivity towards methanol and to minimize methane formation in CO hydrogenation [32]. ZnO does not belong to the reducible oxides, but Au/ZnO catalyst has been demonstrated to be active in low-temperature CO oxidation [29,33,34]. The study by Boccuzzi et al [33,34] on gold supported on ZnO and TiO 2 has shown the existence of two kinds of metallic gold sites, which are able to adsorb both oxygen and carbon monoxide at the same time.…”

The Art of Manufacturing Gold Catalysts

“…Using this method Au on α-Fe 2 O 3 [29][30][31][32][33][34][35][36][37][38][39][40], MnOx [41], ZnO [42][43][44][45] can be prepared with good dispersion. Addition of magnesium citrate during or after the precipitation was shown to be beneficial in some cases such as for Au/TiO 2 [46].…”

Size Effects of Platinum Colloid Particles on the Structure and CO Oxidation Properties of Supported Pt/Fe2O3 Catalysts

“…[20][21][22] Recent results have shown that supported Pt/Fe 2 O 3 catalysts, prepared using a colloid-deposition method, are very active and stable for the low-temperature oxidation of CO and formaldehyde. 23,24 The presence of suitable interactions between Pt particles and iron oxide supports (primarily in the form of Pt-O-Fe bonds) has been proposed, and could be a key factor in influencing the catalytic activity of Pt/Fe 2 O 3 catalysts.…”