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Influence of the nature of the lanthanide element of Ln2CuO4 precursors on the catalytic activity obtained after activation in the CO + NO reaction

“…The catalysts were prepared by the so-called evaporation-decomposition method, as exactly described in a former work [5]. Starting from the corresponding nitrates and passing by an intermediate decomposition at 500°C, the final calcination temperature was 1000°C.…”

“…Conditions were previously described in full detail [5]. It is important to note here that the temperatures corresponding to 50 and 80% conversion (T50, T80) and the activity values given in this paper were obtained after preconditioning the catalyst under reaction conditions, i.e.…”

“…Perovskite-type ABO 3 mixed oxides [1][2][3] and related A 2 BO 4 structures [4][5][6][7] had been investigated as catalysts for the exhaust gas after-treatment of automobiles since around 30 years. Their interest is still under study [8][9][10][11] and, recently, their introduction to automotive series application, in combination with precious metals, was announced by a car manufacturer [12].…”

Influence of palladium on the structure of LaSrCo0.9Pd0.1O4 catalysts and their properties for the selective oxidation of CO

“…Mixed oxides A 2 BO 4 with the K 2 NiF 4 structure, consisting of alternate perovskite (ABO 3 ) and rock salt (AO) layers, have been examined due to their low cost, high catalytic activity and high thermal stability [7]. In A 2 BO 4 the Bsite is surrounded octahedrally by oxygen and the A-site is in the cavity between these octahedra.…”

<b>The surface behaviour and catalytic properties of Nd_2-XSr_XCoO_4±Λ mixed oxides</b>

“…In order to eliminate them, precious metal catalysts are widely used [3][4][5] but as they are expensive it is necessary to search for low-cost materials. The perovskite-like A 2 BO 4 mixed oxides with the K 2 NiF 4 structure consisting of alternating layers of ABO 3 , as in perovskite, and AO, as in rock salt, show high catalytic activity and good thermal stability and are also low-cost [6][7]. At present, there are many studies on LnSrCuO 4 and LnSrNiO 4 [8][9][10][11], and a few on the oxidation of CO and C 3 H 8 on LnSrCoO 4 [12], but no study on NO reduction over LnSrCoO 4 has been reported.…”