Abstract
Catalytic oxidation is used as the most effective to remove CO in the exhaust gases from automobiles and power plants. PdOx/MnOx was examined as a catalyst for CO oxidation using a conventional flow reactor at 50°-150°C. In the reaction conditions of GHSV of 1.22 x 105/hr and CO concentration of 2000 ppm, PdOx/MnO2 showed higher catalytic activity compared with PdOx/Mn2O3, which was previously reported as an effective catalyst due to the cooperative action of palladium and Mn2O3 for this reaction. The reason for higher activity of PdOx/MnO2 than PdOx/Mn2O3 was studied using TPR and XPS studies. TPR showed that PdOx/MnO2 could be reduced by CO at much lower temperature than PdOx/Mn2O3. XPS showed that the valence of manganese in the PdOx/MnO2 was between 4+ and 3+, which was higher than that of manganese in the PdOx/Mn2O3 catalyst of which the valence was between 3+ and 2+. The readiness of MnO2 to be reduced with maintaining a higher oxidation state showed higher CO oxidation activity than Mn2O3 as support for PdOx.
| Original language | English |
|---|---|
| Pages (from-to) | 127-131 |
| Number of pages | 5 |
| Journal | Topics in Catalysis |
| Volume | 10 |
| Issue number | 1-2 |
| Publication status | Published - 2000 Mar 1 |
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Keywords
- CO oxidation
- PdO/MnO
- Redox properties
ASJC Scopus subject areas
- Catalysis
- Chemistry (miscellaneous)
- Physical and Theoretical Chemistry
Cite this
High catalytic activity of PdOx/MnO2 for CO oxidation and importance of oxidation state of Mn. / Park, Jong Soo; Doh, Dong Sup; Lee, Kwan Young.
In: Topics in Catalysis, Vol. 10, No. 1-2, 01.03.2000, p. 127-131.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High catalytic activity of PdOx/MnO2 for CO oxidation and importance of oxidation state of Mn
AU - Park, Jong Soo
AU - Doh, Dong Sup
AU - Lee, Kwan Young
PY - 2000/3/1
Y1 - 2000/3/1
N2 - Catalytic oxidation is used as the most effective to remove CO in the exhaust gases from automobiles and power plants. PdOx/MnOx was examined as a catalyst for CO oxidation using a conventional flow reactor at 50°-150°C. In the reaction conditions of GHSV of 1.22 x 105/hr and CO concentration of 2000 ppm, PdOx/MnO2 showed higher catalytic activity compared with PdOx/Mn2O3, which was previously reported as an effective catalyst due to the cooperative action of palladium and Mn2O3 for this reaction. The reason for higher activity of PdOx/MnO2 than PdOx/Mn2O3 was studied using TPR and XPS studies. TPR showed that PdOx/MnO2 could be reduced by CO at much lower temperature than PdOx/Mn2O3. XPS showed that the valence of manganese in the PdOx/MnO2 was between 4+ and 3+, which was higher than that of manganese in the PdOx/Mn2O3 catalyst of which the valence was between 3+ and 2+. The readiness of MnO2 to be reduced with maintaining a higher oxidation state showed higher CO oxidation activity than Mn2O3 as support for PdOx.
AB - Catalytic oxidation is used as the most effective to remove CO in the exhaust gases from automobiles and power plants. PdOx/MnOx was examined as a catalyst for CO oxidation using a conventional flow reactor at 50°-150°C. In the reaction conditions of GHSV of 1.22 x 105/hr and CO concentration of 2000 ppm, PdOx/MnO2 showed higher catalytic activity compared with PdOx/Mn2O3, which was previously reported as an effective catalyst due to the cooperative action of palladium and Mn2O3 for this reaction. The reason for higher activity of PdOx/MnO2 than PdOx/Mn2O3 was studied using TPR and XPS studies. TPR showed that PdOx/MnO2 could be reduced by CO at much lower temperature than PdOx/Mn2O3. XPS showed that the valence of manganese in the PdOx/MnO2 was between 4+ and 3+, which was higher than that of manganese in the PdOx/Mn2O3 catalyst of which the valence was between 3+ and 2+. The readiness of MnO2 to be reduced with maintaining a higher oxidation state showed higher CO oxidation activity than Mn2O3 as support for PdOx.
KW - CO oxidation
KW - PdO/MnO
KW - Redox properties
UR - http://www.scopus.com/inward/record.url?scp=0010637736&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0010637736&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0010637736
VL - 10
SP - 127
EP - 131
JO - Topics in Catalysis
JF - Topics in Catalysis
SN - 1022-5528
IS - 1-2
ER -