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Title

Preferential oxidation of CO on a La-Co-Ru perovskite-type oxide catalyst

AuthorsPereñíguez, Rosa ; Caballero, Alfonso ; Ferri, Davide
KeywordsLaCoO3
Ru
PROX
CO methanation
Reduction
Structural regeneration
Issue Date10-Mar-2017
PublisherElsevier
CitationCatalysis Communications 92: 75-79 (2017)
AbstractA Ru-containing perovskite-type oxide La(Co,Ru)O of nominal composition LaCoRuO was prepared by ultrasonic spray combustion and tested for the preferential oxidation of CO (PROX). EXAFS indicated that Ru adopted the coordination environment of Co in LaCoO while Co was present as LaCoO and CoO. PROX activity was replaced by CO hydrogenation activity above 250 °C. Short oxidation at 500 °C between temperature programmed reaction ramps did not restore the initial La(Co,Ru)O structure but generated a catalyst with improved PROX activity compared to the initial La(Co,Ru)O. Under reductive PROX conditions the material experienced structural changes that improved its overall catalytic activity only if the catalyst was oxidized after each temperature programmed ramp.
Publisher version (URL)https://doi.org/10.1016/j.catcom.2016.12.020
URIhttp://hdl.handle.net/10261/191421
DOI10.1016/j.catcom.2016.12.020
ISSN1566-7367
Appears in Collections:(ICMS) Artículos
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