Optimization of the combustion synthesis towards efficient LaMnO3+y catalysts in methane oxidation

A solid glycine-based precursor for the preparation of La2CuO4 by combustion method

“…In aqueous solutions the metal cations generally interact with the O, N-donor ligands, which helps to achieve a uniform distribution of the cations in the precursor polymetallic structure at the atomic level [15]. Second, heating of the precursor containing organic components together with nitrates leads, upon heating, to its ignition and burning accompanied by evolution of large amounts of heat and gaseous products [8,12]. This leads to a high dispersion of the forming perovskite particles [8,12,14].…”

“…In the recent time, perovskites have increasingly been synthesized by combustion of the gel-like precursors obtained through evaporation of aqueous solutions containing nitrates of the desired metals and various organic compounds [3][4][5][6][7][8][9][10][11][12]. The organic component, typically represented by glycine [6,8,10,12], citric acid [7,9,11], ethylene glycol [8] (or ethylene glycol with citric acid [5,11]), urea [4] and others [3], serves several purposes.…”

“…The organic component, typically represented by glycine [6,8,10,12], citric acid [7,9,11], ethylene glycol [8] (or ethylene glycol with citric acid [5,11]), urea [4] and others [3], serves several purposes. First, it acts as a complexing agent [12][13][14]. In aqueous solutions the metal cations generally interact with the O, N-donor ligands, which helps to achieve a uniform distribution of the cations in the precursor polymetallic structure at the atomic level [15].…”

Preparation of LaFe0.95Pd0.05O3 perovskites and their catalytic performances in methane combustion

“…LaCoO 3 and LaMnO 3 usually displayed superior activities [11,12] and Pd addition could further promote their performances [13−15]. But they suffered from poor stability at high temperatures, especially in the case of Pd-LaCoO 3 [5,16].…”

Structural Properties and Catalytic Activity of Sr-Substituted LaFeO3 Perovskite

“…The B site cation in the LaMO 3 framework not only acts as the active sites but also accounts for structural stability under redox conditions [1,4,5]. LaCoO 3 and LaMnO 3 usually give higher activity [6,7] but are less stable at high temperatures [5]. LaFeO 3 has excellent thermal stability, especially under the fluctuating redox conditions of automobile exhaust gases [5].…”