On Pd Carbide Formation and Vinyl Acetate Synthesis

Bowker, Mike; Morgan, Chris

doi:10.1007/s10562-004-6448-4

Cited by 22 publications

(17 citation statements)

References 3 publications

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“…The formation of PdC x likely leads to deactivation of the catalysts. Similar arguments have been proposed by Bowker and Morgan [32]. In case of Pd(100) there is no peak around 282-283 eV corresponding to the C 1s feature for PdC x .…”

Section: Resultssupporting

confidence: 85%

Ethylene combustion on unsupported and supported Pd: a comparative study

2007

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Ethylene combustion is studied at elevated pressures on Pd(100) and compared with supported Pd catalysts. Specific rates of CO 2 formation were determined on Pd(100), 1 wt% (d Pd = 2.5 nm) and 5 wt% (d Pd = 4.2 nm) Pd/SiO 2 catalysts as a function of the O 2 /C 2 H 4 ratio over the temperature range 428-473 K. Reaction rates and apparent activation energies on these catalysts are particle size and reactant ratio dependent. The surface carbon concentration on Pd(100) depends on the ratio of the reactants and decreases with increasing O 2 pressure. The combustion kinetics is related to the corresponding surface carbon coverage; the highest reaction rate was achieved for relatively low coverage of surface carbon.

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Section: Resultssupporting

confidence: 85%

Ethylene combustion on unsupported and supported Pd: a comparative study

2007

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“…The di-s bonding ethylene and ethylidyne species formed on the surface with continuous Pd sites may further decompose into carbon species on the surface thus block and poison the surface active sites. The addition of Au to Pd significantly suppresses carbon deposition via reactant and product decomposition for high surface area supported catalysts [53,54].…”

Section: Defining the Surface Adsorption Sitesmentioning

confidence: 99%

The nature of the active site for vinyl acetate synthesis over Pd–Au

et al. 2006

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“…11(A)) [45], CO is likely a more effective poison for larger Pd ensembles. Hence, addition of Au to Pd was found to significantly suppress carbon deposition via reactant and product decomposition which, in turn, leads to a reduction in dehydrogenation rates that favors selective acetoxylation [17,[56][57][58][59].…”

Section: Model Catalystsmentioning

confidence: 99%