Collect. Czech. Chem. Commun. 1992, 57, 2575-2582

Examination of High-Loaded Nickel Catalysts by IR Spectroscopy: Effect of the Support and Pd on Surface Properties

Květa Jirátováa, Lenka Morávkováa, Hana Šnajdaufováa and Evgenii A. Paukshtisb

a Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol, Czechoslovakia
b Institute of Catalysis, Siberian Branch of Academy of Sciences of the U.S.S.R., 630 090 Novosibirsk, Russia


Activation of the ammonia molecule and subsequent adsorption of the NH2 fragment on the surface of the NiO + Pd/TiO2 catalysts, in contrast to NiO + Pd/SiO2 catalysts, was demonstrated by IR spectroscopy. The decrease in the NiO + Pd/TiO2 catalyst acidity was manifested in the higher catalyst stability in reductive amination of diethylene glycol to morpholine.