Superbase derived from zirconia-supported potassium nitrate

摘要

Superbasic sites can be generated on ZrO_2 by loading with KNO_3. The spontaneous dispersion capacity of KNO_3 on ZrO_2 was 8.1 K~+ nm~-2 and the KNO_3 starts to decompose near 350deg.C, much lower than that for the decomposition of Unsupported KNO_3. KNO_3/ZrO_2 samples exhibited a high activity in both dehydrogenation of isopropanol at 400deg.C and Isomerization of cis-but-2-ene at 0deg.C. Moreover, they possessed the base strength of H_-=26.5, which is the characteristic of solid superbase.