Oxidized diamond played a significant role as an efficient support for a Cr 2 O 3 -loaded catalyst during the dehydrogenation of C 2 H 6 to C 2 H 4 in the presence of carbon dioxide at 923 K, giving a 22.5% C 2 H 4 yield with a 87.7% C 2 H 4 selectivity. The activity of the oxidized diamond-supported Cr 2 O 3 catalyst in the presence of CO 2 was about 3 times higher than that in the absence of CO 2 . The activity of the oxidized diamond-supported Cr 2 O 3 catalyst increased with increasing CO 2 partial pressures. XPS analyses of the fresh and the reacted catalysts in the presence and absence of CO 2 revealed that CO 2 maintained the surface Cr 2 O 3 at a higher-oxidation state than the reaction in the absence of CO 2 . On the other hand, bulk of Cr 2 O 3 was not reduced in either atmosphere.
No takes yet. Share an insight, caveat, or question.
Nakagawa et al. (2003) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: