Pd/SiC Catalysts

Méthivier, C.; Beguin, B.; Brun, M.; Massardier, J.; Bertolini, J.C.

doi:10.1006/jcat.1997.1924

Cited by 36 publications

(8 citation statements)

References 14 publications

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“…Based on the CO chemisorption results, one can propose that some Si adatoms present on the Pd particles just after the preparation can be oxidized generating some coating of the metal particles. However, TEM observations did not reveal such phenomenon, as it was the case for sub-nanometer layers formed after methane oxidation on Pd/b-Si 3 N 4 [6] and on Pd/a-SiC [5] catalysts. This clearly indicates that, in the present case, Pd surface coating is certainly on the submonolayer range and localised on specific sites, which renders its direct observation difficult with the physical methods of characterisation used.…”

Section: Methane Total Oxidationmentioning

confidence: 97%

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Surface Modification of Pd/α-Si3N4 Catalysts Through the Solvent Used During Synthesis. Implications on the CO Chemisorption Properties and Catalytic Performances

2009

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Palladium catalysts supported on a-Si 3 N 4 were prepared by impregnation with Pd(II)-acetate dissolved either in toluene or in water. The mean metal particle size of *0.5 wt% Pd catalysts was similar (*5 nm) and independent of the way of preparation. Nevertheless, the two catalysts present very different chemisorption behaviour chemisorptive and catalytic properties. Fourier transformed infrared (FTIR) spectra of adsorbed CO at different temperatures (ranging from room temperature to 300°C) show a very different behaviour for both catalysts. While the CO adsorption states on the Pd/a-Si 3 N 4 prepared in toluene are very similar to those generally measured for silica and/or alumina supported palladium catalysts, CO chemisorbs less strongly on Pd/a-Si 3 N 4 prepared in water and on different adsorption sites. The Pd/a-Si 3 N 4 catalyst obtained by aqueous impregnation is much less efficient for the methane total oxidation. It is less active and less stable: it deactivates strongly after 3 h on stream at 650°C. The two catalysts present about the same activity for the 1,3-butadiene hydrogenation after stabilisation at 20°C. But, the catalyst prepared in water shows a much better selectivity to butenes. The results are discussed in terms of the possible migration of silicon atoms from the silicon nitride support to the surface of the palladium particles, when the catalyst is prepared in water. This is not the case when prepared in an organic solvent.

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Section: Methane Total Oxidationmentioning

confidence: 97%

“…But, the deactivation of catalysts is an important issue for the design of a commercial catalytic system for such a high temperature reaction. Poisoning, sintering, coking or fouling are reported as causes of the catalyst deactivation [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Pd/α-Si3N4 Catalysts Through the Solvent Used During Synthesis. Implications on the CO Chemisorption Properties and Catalytic Performances

2009

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“…It is a very promising catalyst support in place of the traditional insulated supports in highly endothermic or exothermic reactions [15,16]. SiC has been proved to be a superior catalyst support in many different reactions, e.g., methane reforming [17][18][19][20][21], automotive exhaust treatment [22][23][24], methane combustion [25][26][27], butane oxidation [28], Fischer-Tropsch synthesis [29][30][31], oxidative coupling of methane [32], isomerization [33], and dehydrogenation [34]. However, to the best of our knowledge, SiC support is less employed in the methanation reaction.…”

Section: Introductionmentioning

confidence: 99%

A comparison of Ni/SiC and Ni/Al2O3 catalyzed total methanation for production of synthetic natural gas

Zhang

Sun

Peng

et al. 2013

Applied Catalysis A: General

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“…Studies on SiC [5,12,23,24,[31][32][33][34][35][36], BN [22,[37][38][39][40] and AlN [41][42][43][44] provide examples.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Silicon Nitride in Catalysis

Aires¹,

Bertolini²

2009

Top Catal

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Aires, F. J. Cadete Santos Bertolini, J. C.Silicon nitride has very good thermal and chemical stability, as well as high thermal conductivity compared to oxide materials, which are commonly used as catalyst supports. In exothermic reactions working at high temperature, this facilitates heat transfer and thus limits the formation of local hot spots, which are often responsible for structural modification of the support in addition to sintering of active phases. However, it is only recently that this material has been considered for application as a catalyst support for high temperature reactions. It is now established that silicon nitride can be a good support for catalytically active phases. Its range of application is continually expanding (e.g., partial/total oxidation of methane, hydrogenation and dehydrogenation reactions, photocatalysis, base catalysis, etc.)

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Pd/SiC Catalysts

Cited by 36 publications

References 14 publications

Surface Modification of Pd/α-Si3N4 Catalysts Through the Solvent Used During Synthesis. Implications on the CO Chemisorption Properties and Catalytic Performances

Surface Modification of Pd/α-Si3N4 Catalysts Through the Solvent Used During Synthesis. Implications on the CO Chemisorption Properties and Catalytic Performances

A comparison of Ni/SiC and Ni/Al2O3 catalyzed total methanation for production of synthetic natural gas

On the Use of Silicon Nitride in Catalysis

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