Effects of anion and synthesis route on the structure of (La0.9 Sr0.1) (Cr0.85 Fe0.05 Co0.05 Ni0.05)O3−δ perovskite and removal of impurity phases

Modified Pechini Synthesis of Oxide Powders and Thin Films

“…Gupta and Whang also did a series of experiments where they changed between nitrates and acetates as precursors for the preparation of La0.9Sr0.1Cr0.85Fe0.05Co0.05Ni0.05O3−δ (Gupta and Whang 2007). They observed that using acetates gave less secondary phases, and discussed this in relation to the pH in the solution and its influence on the chelating ability of CA.…”

Effect of strontium ion doping on structural, thermal, morphological and electrical properties of a co-doped lanthanum manganite system

“…The intensity of peaks due to the impurity phase was very weak to observe for the sample with x = 0.3 mole. The impurity is formed probably due to the strontium ion's properties relative to other cations, such as a large ionic radius, a high polarizability, a low acidity and a tendency to be free in the metal citrate environment [16][17][18][19]. It was shown that the less acidic nature of Sr 2+ relative to La 3+ slows down the protonation process of chelating agent and allows alternative side reactions for forming secondary phase [18].…”

“…[20]. The procedure has already been appeared elsewhere [9,16]. The sites occupancies were maintained at fixed values consistent with the nominal stoichiometry.…”

“…All experiments were performed in air. The methodologies have already been presented elsewhere [9,16].…”

Solid Oxide Fuel Cell Anode Materials for Direct Hydrocarbon Utilization

“…La 0.9 Sr 0.1 Cr 0.85 Fe 0.05 Co 0.05 Ni 0.05 O 3 could be prepared as a single perovskite. [ 248 ] Temperature programmed reduction (TPR) of LaCr 0.9 TM 0.1 O 3 (TM = Mn, Fe, Co, Ni) in CH 4 -rich fuels showed that Co and Mn were least effi cient and Ni was most effi cient towards CH 4 oxidation. All LaCr 0.9 TM 0.1 O 3 (TM = transition metals) were carbonresistant expect LaCr 0.9 Fe 0.1 O 3 .…”