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High-temperature calcination and reduction treatments of cobalt particles (17–20nm) supported on TiO2 create cobalt particles covered with a TiOy layer. The layer thickness ranges from 2.8 to 4.0nm. These phenomena, commonly called strong metal-support interaction (SMSI), can be used to improve the catalyst stability and change the catalyst selectivity. For example, non-overcoated cobalt catalysts...
Pretreatment temperature affects the activity of a RhRe/C catalyst for CO hydrogenolysis of 2-(hydroxymethyl)tetrahydropyran and for dehydration of fructose. Catalytic activities for both CO hydrogenolysis and dehydration were observed to decrease with an increase in pretreatment temperature from 393 to 723K, which coincides with a decrease in the number of sites quantified using NH 3 temperature-programmed...
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