N 2O catalytic decomposition and temperature programmed desorption tests on alkali metals promoted Co–Mn–Al mixed oxide

Abstract

A series of Co–Mn–Al mixed oxides modified with alkali metals (Li, Na, and K) were prepared from Co–Mn–Al layered double hydroxide and tested for N 2O catalytic decomposition in inert gas and in the presence of oxygen. Chemical analysis, XRD, N 2 sorption, TPD-O 2 and TPD-N 2O were used to characterize the catalysts. During TPD-O 2, higher amount of O 2 was desorbed from more active catalysts. The extent of O 2 inhibition related to the degree of surface coverage by oxygen.