Activity and physical properties of Ni/SiO2 hydrogenation catalysts

Abstract

The influence of the reduction temperature of Ni/SiO2 catalyst on the amount of adsorbed hydrogen and on the hydrogenation rate of o-nitrophenol and sunflower oil has been followed. The total amount and two forms of adsorbed hydrogen have been determined by TPD and electrochemical cyclic galvanostatic charging methods. The properties of catalysts were further studied by the measurement of polarization curves of electrochemical oxidation and evolution of hydrogen.The correlation between the hydrogenation rates of o-nitrophenol and weakly adsorbed hydrogen on the one hand and that of sunflower oil and total amount of adsorbed hydrogen on the other hand has been found.