Perovskite-based catalysts for the control of nitrogen oxide emissions from diesel engines

Abstract

Nitrogen oxides removal over a wide range of perovskite-based catalysts together with their property-activity relationships.

Direct oxidative C(sp3)─H/C(sp2)─H coupling reaction using recyclable Sr‐doped LaCoO3 perovskite catalyst

“…Similar to other oxidative coupling reactions, an oxidant was required for the C(sp 3 coupling reaction between 1,1-diphenylethylene and THF. We therefore tested a series of oxidants for this reaction, including both inorganic and organic oxidants (entries [16][17][18][19][20][21][22][23][24]. It was noted that the reaction was markedly controlled by the nature of the oxidant.…”

“…The past few decades have witnessed extensive research on applications of perovskites in many fields . Perovskites are complex metal oxides with the general formula ABO 3 , in which A can be an alkali metal, alkaline earth metal or lanthanide metal while B represents a metallic element with a 3d, 4d or 5d configuration .…”

“…The past few decades have witnessed extensive research on applications of perovskites in many fields. [17][18][19][20] Perovskites are complex metal oxides with the general formula ABO 3 , in which A can be an alkali metal, alkaline earth metal or lanthanide metal while B represents a metallic element with a 3d, 4d or 5d configuration. [21][22][23] When A is substituted by other metals, the valence state of B is affected; therefore different catalytic activity would be expected.…”

Effect of Neodymium on the Physico‐chemical Properties and N2O Decomposition Activity of Co(Cu)−Al Mixed Oxides

“…Compared to other routes for N 2 O removal, i. e., utilization of N 2 O in the selective catalytic oxidation or reduction with additional reactants, the direct N 2 O decomposition constitutes the most appropriate solution to abate nitric oxide from the industrial sources due to its simplicity . A great number of active catalytic systems have been reported for deN 2 O, including zeolites, hexaaluminates, perovskites, spinels, hydrotalcite derived mixed metal oxides, etc., and they are summarized in recent reviews . Among others, high activity in N 2 O decomposition were reported over Cu‐ and/or Co‐containing hydrotalcite derived mixed metal oxides.…”

“…[4] A great number of active catalytic systems have been reported for deN 2 O, including zeolites, [5,6] hexaaluminates, [7,8] perovskites, [9,10] spinels, [11][12][13][14] hydrotalcite derived mixed metal oxides, [13,14] etc., and they are summarized in recent reviews. [2][3][4]17,18] Among others, high activity in N 2 O decomposition were reported over Cu-and/or Co-containing hydrotalcite derived mixed metal oxides. For example, Kannan [19] investigated CuÀ Al, NiÀ Al and CoÀ Al (M/Al = 3/1, mol.…”