Effect of the preparation method on the catalytic activity of La1−xCaxFeO3 perovskite-type oxides

Effect of B‐site cation on the catalytic activity of La1−xCaxBO3 (B = Fe, Ni) perovskite‐type oxides for toluene combustion

“…The evolution of oxygen during temperature-programmed desorption experiments provides information about the redox properties of these oxides. 21 The O 2 -TPD profiles of the Fe and Ni series are shown in Fig. 3(a) and 3(b).…”

A Novel Grind Process to Synthesize Nano-Micron Structured LaMnO3 for Catalytic Combustion of Methane

“…The preparation procedure is of importance to determine the properties of these materials. Various preparation methods can be found in the literature [4,[10][11][12][13][14][15], however, they all more or less suffered from the challenge mentioned above.…”

Structural Properties and Catalytic Activity of Sr-Substituted LaFeO3 Perovskite

“…However, it has also been reported that a substitution had no promotion or even a negative effect on catalytic performance. For example, compared with the parent LaFeO 3 , La 1-x Ca x FeO 3 (x = 0.1-0.4) gave almost the same activity [3,15] while LaFe 1-x Mg x O 3 (x = 0.1-0.5) gave much lower activity [20] in CH 4 combustion. We have recently reported that Pd doping of the B site cation in LaFeO 3 perovskite enhanced the catalytic activity and structural stability at high temperatures and in a reducing atmosphere [21,22].…”

“…Substitution of La 3+ in LaMO 3 with Ca 2+ or Sr 2+ results in a positive charge deficiency, and to preserve electroneutrality there has to be an increase in the oxidation state of the transition metal at the B site and/or generation of structural defects such as oxygen vacancies [3,[13][14][15]. These structural changes can give a much altered catalytic performance.…”