Phase composition, reducibility and catalytic activity of Rh/zirconia and Rh/zirconia-ceria catalysts

Catalytic activity of the Rh loaded zirconia-ceria solid solution with cubic phase is quite higher than for the catalysts containing tetragonal and monoclinic phases of zirconia. The latter exhibited an inducing period in the reaction temperatures below 180 °C on the catalytic activity profile that might be a result of the relatively low reducibility of these support.