Catalysis with palladium deposited on rare earth oxides: influence of the support on reforming and syngas activity and selectivity

Normand, F. Le; Barrault, J.; Breault, Raymond; Hilaire, L.; Kiennemann, A.

doi:10.1021/j100154a050

Cited by 64 publications

(15 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, we have found that the formation of LaOCl was always very rapid, and only required temperatures as high as 300 ¡C. Furthermore, it seems that LaOCl is a relatively stable structure as large amounts of were required for the complete conversion into vals.25 Thus, it seems that at lower temperatures the chloride ions introduced into the lattice are disordered, and the formation of the metal chloride occurs without the generation of a Finally, Le Normand et al38 reported the formation of REOCl (with RE \ La, Pr, Nd and Tb) during the synthesis of PdÈrare earth oxide catalysts. These catalysts were prepared by impregnation of the rare earth metal oxide with a precursor.…”

mentioning

confidence: 57%

Destructive adsorption of carbon tetrachloride on lanthanum and cerium oxides

Weckhuysen¹,

Rosynek²,

Lunsford³

1999

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The destructive adsorption of on and in the absence of any oxidant, such as oxygen, has CCl 4 La 2 O 3 CeO 2 been studied by X-ray photoelectron spectroscopy and in situ Raman spectroscopy as a function of the reaction temperature and the amount of injected. was much more reactive than and CCl 4 La 2 O 3 CeO 2 , CCl 4 destruction started at around 300 ¡C with the rapid formation of LaOCl, and the release of into the gas CO 2 phase. The complete transformation of LaOCl into was much more difficult to obtain, and required LaCl 3 high reaction temperatures and large amounts of In the case of destruction started at CCl 4 . CeO 2 , CCl 4 around 450 ¡C, and was accompanied by the reduction of Ce(IV) to Ce(III) and the formation of CeOCl as an intermediate product. The complete transformation of into was only observed at reaction CeO 2 CeCl 3 temperatures near 600 ¡C. These results are compared with those recently reported for alkaline earth metal oxides.

show abstract

mentioning

confidence: 57%

Destructive adsorption of carbon tetrachloride on lanthanum and cerium oxides

Weckhuysen¹,

Rosynek²,

Lunsford³

1999

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Though metal vapor deposition has been applied in some cases (231), the impregnation techniques have constituted the most usual preparation procedure. Chlorine-containing (53, 82,85,127,175,278), and chlorine-free (53, 84,232,278) metal precursors have been used. As already reported, PrOCl and TbOCl have been identified in praseodymia and terbia supported catalysts prepared from chlorinated precursors (82).…”

Section: Reactionmentioning

confidence: 99%

“…Chlorine-containing (53, 82,85,127,175,278), and chlorine-free (53, 84,232,278) metal precursors have been used. As already reported, PrOCl and TbOCl have been identified in praseodymia and terbia supported catalysts prepared from chlorinated precursors (82). Water (82,85,127,175), and non-aqueous solvents, like acetone (232), or N,N-dimethyl formamide (53, 84), have been used in the preparation of the impregnating solutions.…”

Section: Reactionmentioning

confidence: 99%

“…Accordingly, on M/Ceria and related catalysts, similar effects might be expected to occur. In fact, many authors (28,41,64,70,73,74,78,82,131,133,137,138,179,196,219,221,224,227,258) have speculated on the existence of some kind of strong metal/support interaction effect in ceria-supported metal catalysts. This phenomenon is relevant by itself, but also because of its obvious implications in the characterisation of metals supported on ceria and related oxides.…”

Section: Some Challenging Aspects Of These Characterisation Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Chemical and Nanostructural Aspects of the Preparation and Characterisation of Ceria and Ceria-Based Mixed Oxide-Supported Metal Catalysts

Bernal

Calvino

Gatica

et al. 2002

Catalysis by Ceria and Related Materials

View full text Add to dashboard Cite

“…In many catalyst systems, the presence of the halide anion is known to affect various aspects of the generation and subsequent behaviour of these materials [18][19][20][21][22]. In this paper we will apply the same approach, combining Quick Pd K-edge EXAFS (QEXAFS) with Cl and Pd L 3 edge XANES, to examine the role of residual Cl in the reduction of Al 2 O 3 supported Pd catalysts.…”

Section: Introductionmentioning

confidence: 99%