The LaCo1−xVxO3 Catalyst for CO Oxidation in Rich H2 Stream

Chagas, Carlos Alberto; Magalhães, Robert Newton S.H.; Schmal, Martín

doi:10.1007/s10562-020-03303-y

Cited by 13 publications

(1 citation statement)

References 67 publications

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“…After the optimization, the catalytic performance of this perovskite formulation for CO oxidation under more realistic conditions, as well as for other applications (i.e. CO preferential oxidation reaction, CO-PROX, commonly employed as an effective procedure for removing CO in H 2 -rich gas mixtures generated by reforming processes, to be used in fuel cells [43,[45][46][47][48]) should be explored.…”

Section: Catalytic Activitymentioning

confidence: 99%

Copper Catalysts Supported on Barium Deficient Perovskites for CO Oxidation Reaction

2022

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Mixed oxides with perovskite-type structure (ABO3) present interesting physico-chemical properties to be used as catalyst for atmospheric pollution control. In this work, a series of CuX/Ba0.7MnO3 catalysts (being x: 0, 4, 8 and 12 wt%) has been synthesized, characterized and tested for CO oxidation reaction. All the catalysts were active for CO oxidation in the two reactant mixtures tested: low CO mixture (0.1% CO and 1% O2 in He) and near stoichiometric mixture (1% CO and 1% O2 in He). Copper-free perovskite is the most active catalyst in the less demanding conditions (0.1% CO and 1% O2), as it presents the highest amount of oxygen vacancies working as active sites. However, at higher CO concentrations (1% CO in near stoichiometric mixture), copper-containing catalysts were more active than the perovskite support because, due to the saturation of the oxygen vacancies of perovskites, CuO seems to participate as active site for CO and O2 activation. Cu4/Ba0.7MnO3 and Cu12/Ba0.7MnO3 are more active than Cu8/Ba0.7MnO3 catalyst, since they present a larger amount of active sites on surface. These two copper-containing catalysts present a high stability and recyclability during the reaction at 300 °C in an ideal near stoichiometric mixture (1% CO and 1% O2).

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