TiO2 and ZrO2 supported Ru catalysts for CO mitigation following the water-gas shift reaction

Heterogeneous Cu–Fe oxide catalysts for preferential CO oxidation (PROX) in H2-rich process streams

“…37,38 The enhanced catalytic activity may be related to an increased availability of CO-free catalyst surface sites due to the incorporation of Fe on Cu sites. 11,12 Our results of the enhanced activity in CO oxidation due to Fe loading has been previously observed by several researchers in the case of CeO 2 , Co 3 O 4 and Mn 3 O 4 (Table 3). 7,8 The PROX process involves two competitive reactions, the oxidation of carbon monoxide and the oxidation of hydrogen.…”

“…A proper material for CO PROX reaction should have high activity, selectivity and stability from 80 to 220 C. 6 In a supported catalyst system, phase-specic mixed metal oxides have recently attracted great interest for use as catalyst and catalyst supports, 7,8 since these materials give rise to well dispersed and stable metal particles on the surface of the support materials and consequently improved catalytic performance. In this regard iron(III) oxide catalysts, which have catalytic characteristics similar to other redox supports with oxygen storage capacities like ceria, 9 zirconia 10 and titania, 11 but are considerably cheaper to produce, have attracted particular interest as catalysts for the preferential oxidation of carbon monoxide (CO PROX).…”

Determining number of sites on ceria stabilizing single atoms via metal nanoparticle redispersion

“…This is a result of several side reactions that can occur over Ru nanoparticles. For example, Ru nanoparticles are known to be active catalysts for the methanation of CO [28][29][30] as well as for the water gas shift reaction [31]. In fact, it has been shown that Ru nanoparticles methanize CO at a higher rate than they methanize CO2 [32].…”

A magnetically recyclable superparamagnetic silica supported Pt nanocatalyst through a multi-carboxyl linker: synthesis, characterization, and applications in alkene hydrosilylation

“…[7][8][9][10] An ongoing application of magnetic materials is to immobilize metal catalysts because efficient separation, recovery and recycling of the catalyst may enhance their lifetime and minimize their consumption to result in signicant economical and environmental benets. [11][12][13][14] Among these transition metal catalysts, such as copper (Cu), platinum (Pt), palladium (Pd), rhodium (Rh), nickel (Ni) or ruthenium (Ru), [15][16][17][18][19][20] Pt is one of the most widely used owing to its unparalleled catalytic activity and mild reaction conditions in various elds, such as hydrosilylation, aldehyde oxidation, sulfuric acid decomposition. Although homogeneous Pt catalysts such as Speier's catalyst and the Karstedt's catalyst suffer from a number of drawbacks, like side reactions and low selectivity and reusability, there isn't efficient substitution in industry.…”