Cu- and Ag-Modified Cerium Oxide Catalysts for Methane Oxidation

Kundakovic, Lj.; Flytzani‐Stephanopoulos, Maria

doi:10.1006/jcat.1998.2213

Cited by 250 publications

(126 citation statements)

References 61 publications

(83 reference statements)

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“…Ceria support was synthesized by precipitation from (NH 4 ) 2 Ce(NO 3 ) 6 by urea at 100 °C in aqueous solution [13,14]. The solution was mixed and boiled for 6 h at 100 °C, the precipitate was washed twice in boiling deionized water and dried at 110 °C overnight.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Oxidative esterification of renewable furfural on gold-based catalysts: Which is the best support?

Menegazzo

Signoretto

Pinna

et al. 2014

Journal of Catalysis

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Gold based catalysts over different supports were investigated in the oxidative esterification of furfural by employing an efficient and sustainable process. The catalytic performances follow the trend: Zirconia-Au > Ceria-Au > > Titania-Au. Zirconia came out to be the best support option to promote activity, selectivity and also stability. The chemical and morphological properties observed for zirconia supported sample seem to fulfil a good compromise between high gold dispersion and the presence of suitable acid-base properties, for good selectivity. Moreover, stability and recycling of the catalysts were also investigated.

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Section: Catalyst Preparationmentioning

confidence: 99%

Oxidative esterification of renewable furfural on gold-based catalysts: Which is the best support?

Menegazzo

Signoretto

Pinna

et al. 2014

Journal of Catalysis

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“…30 The solution was mixed and boiled for 6 h at 100 °C, the precipitate was washed in boiling deionized water and dried at 110 °C for 18 hours. The material was then calcined in flowing air (30 mL/min) at 650 °C for 3 hours.…”

Section: Experimental 21 Synthesis Of Supportsmentioning

confidence: 99%

Hydrogen Production by Ethanol Steam Reforming on Ni-Based Catalysts: Effect of the Support and of CaO and Au Doping

et al. 2017

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ARTICLEThis journal is © The Royal Society of Chemistry 20xx J. Name., 2013, 00, 1-3 | 1 Nickel-based catalysts were investigated for hydrogen production by ethanol steam reforming. A suitable support was looked for among the metal oxides TiO2, ZrO2 and CeO2. Alongside catalytic testing with ethanol-water mixture, a series of characterization measurements were carried out: N2-physisorption, XRD, TPR, TPO, CO2-TPD, SEM, AAS and IC. Zirconium and cerium oxides proved to be suitable supports, even if both still suffer from coking phenomena. The effects of doping by both calcium oxide and gold nanoparticles were checked. Doping by calcium oxide prevented deactivation and highly increased the hydrogen yield. Moreover, the addition of gold nanoparticles greatly improved the hydrogen yield. The combination of the two dopants resulted in the best performing catalyst: the basic doping by CaO and the promotion of the water gas shift reaction by gold nanoparticles contributed to the highest hydrogen production.

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“…Ceria support was synthesized by precipitation from (NH 4 ) 2 Ce(NO 3 ) 6 by urea at 100˝C in aqueous solution [24,25]. The solution was mixed and boiled for 6 h at 100˝C, the precipitate was washed twice in boiling deionized water and dried at 110˝C overnight.…”

Section: Synthesis Of Supportsmentioning

confidence: 99%

Effects of Support and Synthetic Procedure for Sol-Immobilized Au Nanoparticles

et al. 2016

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Abstract:New gold catalysts supported on CeO 2 , ZrO 2 and TiO 2 were synthesized by two different techniques: deposition-precipitation and colloidal method. The role of the surfactant (PVA, PVP, THPC) was also investigated. The catalysts were tested in the oxidation of glucose to gluconic acid, in aqueous environment and under mild conditions (60˝C and atmospheric pressure). TEM and SEM analyses have shown that the small size of gold nanoparticles is a necessary condition, but not sufficient for a good conversion. In fact, for an active sample, we have verified that the excess of surfactant must be removed because it would coat the surface of the catalyst. The surfactant, however, should not be completely eliminated, since it has the fundamental role of stabilizing the sample preventing nanoparticles from aggregation. It was evidenced that both the synthetic approach and the kind of support affect the catalysts' activity. In fact, by focusing on the three different supports, with all the preparation methods, the ceria has proved to be the best support. This is due to its ability to obtain small gold nanoparticles and to its ability to accumulate oxygen. The most appropriate synthesis methodology proved to be the colloidal method with PVA. Recyclability issue was investigated too.

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Cu- and Ag-Modified Cerium Oxide Catalysts for Methane Oxidation

Cited by 250 publications

References 61 publications

Oxidative esterification of renewable furfural on gold-based catalysts: Which is the best support?

Oxidative esterification of renewable furfural on gold-based catalysts: Which is the best support?

Hydrogen Production by Ethanol Steam Reforming on Ni-Based Catalysts: Effect of the Support and of CaO and Au Doping

Effects of Support and Synthetic Procedure for Sol-Immobilized Au Nanoparticles

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