Cobalt-based catalysts supported on titania and zirconia for the oxidation of nitric oxide to nitrogen dioxide

Yung, Matthew M.; Holmgreen, Erik M.; Ozkan, Umit S.

doi:10.1016/j.jcat.2007.02.020

Cited by 149 publications

(51 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In agreement with earlier results [11,37,38] that catalyst is needed to facilitate the reaction. In line with expectations [11,37,38] the catalysts containing Co-oxide were very active ( Fig.…”

Section: Catalytic Resultssupporting

confidence: 93%

See 1 more Smart Citation

Mechanism of NO-SCR by methane over Co,H-ZSM-5 and Co,H-mordenite catalysts

Lónyi

Solt

Pászti

et al. 2014

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

show abstract

Section: Catalytic Resultssupporting

confidence: 93%

“…In line with expectations [11,37,38] the catalysts containing Co-oxide were very active ( Fig. 5A and 5B).…”

Section: Catalytic Resultssupporting

confidence: 90%

Mechanism of NO-SCR by methane over Co,H-ZSM-5 and Co,H-mordenite catalysts

Lónyi

Solt

Pászti

et al. 2014

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

show abstract

“…The chemical properties of the perovskite materials are also known for their flexible characteristics which are associated with their A and/or B site substitution capabilities and availability of a wide variety of sub-stoichiometric structures [6]. The catalytic efficiencies of perovskite materials for NO and N 2 O reduction into N 2 were demonstrated by several studies [7][8][9][10][11][12][13]. Moreover, these materials play an efficient role in the catalytic NO oxidation under lean conditions even in the absence of a noble metal [14,15].…”

Section: Introductionmentioning

confidence: 99%

Palladium doped perovskite-based NO oxidation catalysts: The role of Pd and B-sites for NOx adsorption behavior via in-situ spectroscopy

Say

Doğaç

Vovk

et al. 2014

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

a b s t r a c tPerovskite-based materials (LaMnO 3 , Pd/LaMnO 3 , LaCoO 3 and Pd/LaCoO 3 ) were synthesized, characterized (via BET, XRD, Raman spectroscopy, XPS and TEM) and their NO x (x = 1,2) adsorption characteristics were investigated (via in-situ FTIR and TPD) as a function of the nature of the B-site cation (i.e. Mn vs Co), Pd/PdO incorporation and H 2 -pretreatment. NO x adsorption on of LaMnO 3 was found to be significantly higher than LaCoO 3 , in line with the higher SSA of LaMnO 3 . Incorporation of PdO nanoparticles with an average diameter of ca. 4 nm did not have a significant effect on the amount of NO 2 adsorbed on fresh LaMnO 3 and LaCoO 3 . TPD experiments suggested that saturation of fresh LaMnO 3 , Pd/LaMnO 3 , LaCoO 3 and Pd/LaCoO 3 with NO 2 at 323 K resulted in the desorption of NO 2 , NO, N 2 O and N 2 (without O 2 ) below 700 K, while above 700 K, NO x desorption was predominantly in the form of NO + O 2 . Perovskite materials were found to be capable of activating N-O linkages typically at ca. 550 K (even in the absence of an external reducing agent) forming N 2 and N 2 O as direct NO x decomposition products. H 2 -pretreatment yielded a drastic boost in the NO oxidation and NO x adsorption of all samples, particularly for the Cobased systems. Presence of Pd further boosted the NO x uptake upon H 2 -pretreatment. Increase in the NO x adsorption of H 2 -pretreated LaCoO 3 and Pd/LaCoO 3 surfaces could be associated with the electronic changes (i.e. reduction of B-site cation), structural changes (surface reconstruction and SSA increase), reduction of the precious metal oxide (PdO) into metallic species (Pd), and the generation of oxygen defects on the perovskite. Mn-based systems were more resilient toward B-site reduction. Pd-addition suppressed the B-site reduction and preserved the ABO 3 perovskite structure.

show abstract

“…Moreover, the activity loss of supported platinum catalyst in strong oxidizing conditions remains a problem to be solved. Other catalysts, such as supported cobalt catalysts, are now being investigated as alternative catalysts for NO oxidation [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Oxidation of nitric oxide to nitrogen dioxide over Ru catalysts

Cheng

et al. 2009

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

Cobalt-based catalysts supported on titania and zirconia for the oxidation of nitric oxide to nitrogen dioxide

Cited by 149 publications

References 52 publications

Mechanism of NO-SCR by methane over Co,H-ZSM-5 and Co,H-mordenite catalysts

Mechanism of NO-SCR by methane over Co,H-ZSM-5 and Co,H-mordenite catalysts

Palladium doped perovskite-based NO oxidation catalysts: The role of Pd and B-sites for NOx adsorption behavior via in-situ spectroscopy

Oxidation of nitric oxide to nitrogen dioxide over Ru catalysts

Contact Info

Product

Resources

About