Standard catalysts EUROPT

Standard catalysts EUROPT-1 128, 136, 137, 190, 195, 213, 365-372 Standard catalysts EURONI-1419... 

As the work on these first catalysts progressed, it became clear that there was a demand for standardized platinum catalysts more akin to those used in industry. EUROCAT therefore selected two typical petroleum-reforming catalysts manufactured by AKZO, namely, 0.3% Pt/Al203 and 0.3% Pt-0.3% Re/Al203. These were called EUROPT-3 and -4, respectively (Section 11.1.2.2). More recently still, EUROCAT decided to expand its range of standard catalysts to cover oxides... 

There is a fair amount of experimental information in the literature for NMR of hydrogen on platinum catalysts, and in general it is in good agreement. 1 consider mainly data for the standard Pt/Si02 catalyst EuroPt-1 reported by two groups, but results obtained with alumina supports, other silica-based catalysts, or Pt/Na Y zcohte are not qualitatively different. 

Recently, we have obtained reproducible gas phase enantioselective reaction using 5% Pt/alumina and 5% Pt/silica. " In this paper, we extend this initial study and, in particular, show the results of the gas phase reaction of methyl pyruvate over a non-porous 1% Pt/a-alumina, a 2.5% Pt/silica, and the standard reference catalyst EUROPT-1 (6.3% Pt/silica) each modified by cinchonidine. 

Ways in which rates of reaction may be expressed have been considered in Section 5.2.3. In the present context they are usually given in specific or areal terms, or as turnover frequencies, i.e. rate per (presumed) active centre. Where standard catalysts such as EUROPT-1 have been used, the rate per unit mass of catalyst or metal is sufficient, because this can readily be translated into areal units if comparison with other catalysts is desired. 

The platinum particles in this Pt/silica are structurally similar to, but smaller than, those in the standard reference catalyst EUROPT-1. 

The authors are collaborating in an extensive joint study in which the preparation, characterisation and function of a range of supported platinum catalysts is being evaluated. In part, this study will compare platinum catalysts prepared using conventional supports (e.g. silica, alumina) with those using less conventional supports (e.g. molybdena) or those prepared by less conventional methods (e.g. metal vapour deposition). The restricted object of the present paper is to compare the conventional Pt/silica prepared within this programme with the standard reference silica-supported Pt codenamed EUROPT-1 for which full preparation and characterisation details have been published (refs. 1-5). 

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