Clear microstructure-performance relationships in Mn-containing perovskite and hexaaluminate compounds prepared by activated reactive synthesis.
Microstructural properties of mixed oxides play essential roles in their oxygen mobility and consequently in their catalytic performances. Two families of mixed oxides (perovskite and hexaaluminate) with different microstructural features, such as crystal size and specific surface area, were prepared using the activated reactive synthesis (ARS) method. It was shown that ARS is a flexible route to synthesize both mixed oxides with nano-scale crystal size and high specific surface area. Redox properties and oxygen mobility were found to be strongly affected by the material microstructure. Catalytic activities of hexaaluminate and perovskite materials for methane oxidation were discussed in the light of structural, redox and oxygen mobility properties.
Department of Mining, Metallurgical and Materials Engineering, Université Laval, Québec, CanadaG1V 0A6. houshang.alamdari@gmn.ulaval.ca.
Said
S
Laassiri
Nicolas
N
Bion
Daniel
D
Duprez
Sébastien
S
Royer
Houshang
H
Alamdari
D000537:Aluminum Oxide / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D002384:Catalysis; D008345:Manganese / Q000737:chemistry*; D008697:Methane / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D017610:Calcium Compounds; D010087:Oxides; C059910:perovskite; D008345:Manganese; D014025:Titanium; D000537:Aluminum Oxide; D008697:Methane; D010100:Oxygen