The effect of barium on the catalytic behaviour of fresh and aged Pd-Ba-OSC/AlO catalysts

Kolli, Tanja; Lassi, Ulla; Rahkamaa-Tolonen, K.; Kinnunen, Toni-J.J.; Keiski, Riitta L.

doi:10.1016/j.apcata.2005.09.019

Cited by 36 publications

(9 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It demonstrates that the barium addition slightly promotes the Pd dispersion in all the fresh samples, which is in agreement with the result reported by Kolli et al [33]. The Pd particles grow larger and the Pd dispersion is much lower in the aged PBCZ sample than those in the aged PCZ sample.…”

Section: Tem and Co Chemisorptionsupporting

confidence: 92%

A new insight into the effects of barium addition on Pd-only catalysts: Pd-support interface and CO+NO reaction pathway

Cao

Ran

et al. 2015

Applied Catalysis A: General

View full text Add to dashboard Cite

Section: Tem and Co Chemisorptionsupporting

confidence: 92%

A new insight into the effects of barium addition on Pd-only catalysts: Pd-support interface and CO+NO reaction pathway

Cao

Ran

et al. 2015

Applied Catalysis A: General

View full text Add to dashboard Cite

“…To deal with this situation, catalytic reduction of NO x with CO has been widely studied as an effective and economical technique for simultaneous removal of both NO x and CO with major focus on noble metal catalysts, such as Pt, Rh, Pd, and Au [2][3][4][5]. Recently, much attention has been paid to developing highly efficient non-precious metal catalyst for automobile exhaust purification, especially base metal or metal oxide catalyst.…”

Section: Introductionmentioning

confidence: 99%

DRIFTS study of photo-assisted catalytic CO + NO redox reaction over CuO/CeO2-TiO2

et al. 2015

View full text Add to dashboard Cite

Please cite this article in press as: N. Liu, et al., DRIFTS study of photo-assisted catalytic CO + NO redox reaction over CuO/CeO 2 -TiO 2 , Catal. Today (2015), http://dx. a b s t r a c tCuO/CeO 2 -TiO 2 catalysts have been widely studied for the thermocatalytic NO reduction with CO. Here, we examine to what extent this reaction can be photocatalytically enhanced beyond the mere thermocatalytic activity by irradiating the catalyst with UV light under reaction conditions while observing the reaction progress via DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy). The reaction was studied in a batch reactor at four temperatures (35, 65, 100, and 200 • C). The most pronounced effect of photocatalytic enhancement was observed at 65 • C where an enhanced CO conversion of 64.4% was achieved, compared with 11.5% CO conversion without UV irradiation. The photocatalytic enhancement of the CO conversion diminished as the temperature increased to 200 • C, where the CO conversion process became entirely dominated by thermal catalysis. The promoting effect of ceria on the CO + NO reaction has been revealed and rationalized on the basis of physical and chemical characterizations results. XPS and TPR results suggest that the electronic state interaction between Ce and the other two components (Ti and Cu) in the catalysts might lead to a higher oxygen vacancy concentration that facilitates oxygen transport from ceria to copper species resulting in the high catalytic activity for NO reduction by CO.

show abstract

“…From Fig. 10, degraded catalytic performance of the aged catalysts is observed, which is mainly attributed to the sintering of supports and noble metal particles, as well as the reduction of PdO to Pd at high temperature [55]. Similar with the fresh samples, the aged catalysts also show increasing catalytic performance from Pd/CZAB0a to Pd/CZAB8a, and declined catalytic activity is obtained for Pd/CZAB10a.…”

Section: Three-way Catalytic Performancementioning

confidence: 68%

Promotion of CeO2–ZrO2–Al2O3 composite by selective doping with barium and its supported Pd-only three-way catalyst

Chen

Cao

et al. 2015

Journal of Molecular Catalysis A: Chemical

View full text Add to dashboard Cite

The effect of barium on the catalytic behaviour of fresh and aged Pd-Ba-OSC/AlO catalysts

Cited by 36 publications

References 23 publications

A new insight into the effects of barium addition on Pd-only catalysts: Pd-support interface and CO+NO reaction pathway

A new insight into the effects of barium addition on Pd-only catalysts: Pd-support interface and CO+NO reaction pathway

DRIFTS study of photo-assisted catalytic CO + NO redox reaction over CuO/CeO2-TiO2

Promotion of CeO2–ZrO2–Al2O3 composite by selective doping with barium and its supported Pd-only three-way catalyst

Contact Info

Product

Resources

About