Modified LaCoO3 nano-perovskite catalysts for the environmental application of automotive CO oxidation

Synthesis of Cobalt-Based Nanomaterials from Organic Precursors

“…Thus, the thermal decomposition of both fumarate and gluconate precursors led to the formation of reduced Co-MnO phases in a single step, due to a carbothermal reaction that took place between residual carbon and Co whereas further increase of cobalt content was associated with a decrease of surface area and pore volume [39]. [44]. On the other hand, Gabal et al produced purely trigonal ilmenite CoTiO 3 by thermal treatment of cobalt oxalate-TiO 2 precursor.…”

“…Among the synthesized nanomaterials, Co 2,3 Mn 0,7 O 4 exhibited higher activity than cobalt oxide catalysts [39]. Co 3 O 4 nanoparticles [48] and LaCoO 3 nano-perovskite [44] catalysts were also investigated for CO oxidation reaction and exhibited good structural and chemical stability and high activity. Additionally, Ashouri et al employed MOF-derived Co 3 O 4 for the catalytic oxidation and epoxidation of olefins and reported that the catalyst showed good catalytic stability and reusability [49].…”

“…LaCoO 3 ) by thermal decomposition of citrate complexes using lanthanum(III) nitrate, cobalt(II) nitrate and citric acid as initial compounds. The obtained viscous gel was dried and calcined at 700°C for 5 h under air atmosphere [44].…”

Influence of Sr Substitution on Catalytic Performance of LaMnO3/Ni Metal foam Composite for CO Oxidation

“…Precious-metal-based catalysts are highly active; however, their high cost and low resistance to Cl poisoning are major shortcomings. Due to the rising cost of precious metals, perovskite-type oxides (with the general formula ABO 3 ) have attracted a lot of attention due to their low cost, good redox properties, and high poisoning resistance compared to those of preciousmetal-based catalysts (Seyfi et al, 2009;Zawadzki and Trawczynski, 2011). The redox ability and number of oxygen defects can be varied via a partial substitution with cations with similar oxidation state and ionic radius at the A-site or B-site to form A 1-x A' x B 1-y B' y O 3 , resulting in improved catalytic and other functional properties (Seyfi et al, 2009;Prasad et al, 2012;Wang et al, 2012).…”

“…Due to the rising cost of precious metals, perovskite-type oxides (with the general formula ABO 3 ) have attracted a lot of attention due to their low cost, good redox properties, and high poisoning resistance compared to those of preciousmetal-based catalysts (Seyfi et al, 2009;Zawadzki and Trawczynski, 2011). The redox ability and number of oxygen defects can be varied via a partial substitution with cations with similar oxidation state and ionic radius at the A-site or B-site to form A 1-x A' x B 1-y B' y O 3 , resulting in improved catalytic and other functional properties (Seyfi et al, 2009;Prasad et al, 2012;Wang et al, 2012). Compounds with lanthanum in the A position and Co or Mn in the position B, such as LaCoO 3 or LaMnO 3 , have been studied for application in catalytic oxidation (Prasad et al, 2012;Wang et al, 2012).…”