Untitled

Avgouropoulos, George; Ioannides, Theophilos; Matralis, H.; Batista, Jurka; Hočevar, Stanko

doi:10.1023/a:1009013029842

Cited by 278 publications

(149 citation statements)

References 15 publications

Supporting

Mentioning

140

Contrasting

Unclassified

Order By: Relevance

“…Figure 4 shows that the CO conversion drops above 200°C. This is also reported by Avgouropoulos on a CuO-CeO x catalyst [20]. With a large amount of hydrogen present CeO x has a positive effect on the CO conversion on all three metals.…”

Section: Addition Of Ceo Xsupporting

confidence: 79%

“…By promoting Au catalysts great improvements in activity can be obtained [13,15,16,18] and the temperature range of CO conversion can be enlarged. Recent studies have shown that also CuO mixed with ZnO [19] and CuO mixed with cerium oxide [20][21][22] are promising PROX catalysts. A DFT study [23] shows that gold and copper have a lower barrier for CO oxidation than for H 2 oxidation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A comparative study of the effect of addition of CeO x and Li2O on γ-Al2O3 supported copper, silver and gold catalysts in the preferential oxidation of CO

2007

View full text Add to dashboard Cite

In the study described in this paper we deposited gold, silver and copper on c-Al 2 O 3 as nanoparticles (<4 nm) and investigated the behavior of these nanoparticles in the preferential oxidation of CO in presence of H 2 . In addition, the effect of addition of CeO x and/or Li 2 O was investigated. All the three metals show preferential oxidation of CO at low temperatures. The oxides added to Au/c-Al 2 O 3 , Ag/c-Al 2 O 3 and Cu/c-Al 2 O 3 improve the catalytic performance of the gold, silver and copper. Interesting and synergistic effects were observed when both the CeO x and Li 2 O were added. Possible mechanisms are proposed.

show abstract

Section: Addition Of Ceo Xsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

A comparative study of the effect of addition of CeO x and Li2O on γ-Al2O3 supported copper, silver and gold catalysts in the preferential oxidation of CO

2007

View full text Add to dashboard Cite

show abstract

“…10,12) Catalyst 0.1 mass% Pt + 7.5 mass% CuO/CeO 2 (PtCu/Ce) was prepared by the urea nitrates combustion method described by H. Matralis et al 11) with molar ratios of urea/nitrate = 4.17. Ce(NO 3 ) 3 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 O, H 2 PtCl 6 ·6H 2 O complex, urea (CO(NH 2 ) 2 ) and £-Al 2 O 3 were purchased from Merck.…”

Section: Methodsmentioning

confidence: 99%

Kinetics of CO Oxidation over Pt-Modified CuO Nanocatalysts

et al. 2015

View full text Add to dashboard Cite

Three Pt-CuO nanocatalysts PtCu/Al, PtCu/CeAl and PtCu/Ce have been successfully prepared. The characterization of the catalysts was examined by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray energy dispersive analysis (EDS), temperatureprogrammed reduction (TPR), nitrogen physisorption measurements, and IR-CO adsorption. The kinetics of CO oxidation using these catalysts was studied in a gradientless flow-circulating system at 398498 K. The obtained kinetic equation confirmed that the reaction proceeds in medium surface coverage with the participation of CO molecules and oxygen atoms.

show abstract

“…The catalysts were prepared by urea-nitrate combustion method as described elsewhere [26]. The metal nitrates and urea were dissolved in distilled water, under vigorous stirring at 80 0 C for very short period.…”

Section: Urea-nitrate Combustion Methodsmentioning

confidence: 99%

“…The CuO-CeO2 based catalysts can be grouped [25] into three categories: (a) CuO and CeO2 catalysts [26,[27][28][29][30][31], (b) CuO catalysts doped with CeO2 supported on alumina [32,[33][34][35], (c) CuO catalysts supported on mixed CexZr (1-X) O2 oxides [36,37]. It has been reported in the literature that the methods of preparation govern the properties of the catalysts [38].…”

mentioning

confidence: 99%