Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Polish Journal of Chemistry

1 2005

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

The Characterization of Modified Higher Aliphatic Alcohols-Synthesis Catalysts by EPR and XPS Methods

Skrzypek D., Krupa K., Winiarski A., Szymanska B.

Polish Journal of Chemistry

2005

Vol. 79 / nr 1

145-153

Aseries of copper-zinc catalysts for aliphatic alcohols synthesis with a varying amount of additives was prepared by thermal decomposition of metal citrates. The results of catalytic experiments, made in a laboratory high-pressure reactor, showed a good stability and almost constant activity and selectivity during 4 months. In this paper the catalyst before (A) and after (B) reaction is characterized by EPR and X-ray photoelectron spectroscopies. For catalystAthe copper species were identified as isolated Cu2+ ions in a dynamic Jahn-Teller configuration. For the sample B the EPR spectrum is complex and its features are corresponding to: clustered Cu2+ species with dipole-dipole interaction; Fe3+ ions in rhombically distorted symmetry; O2- centres.