Kinetics and mechanism of the oxidation of carbon monoxide over cadmium oxide-lanthanum sesquioxide system

Keu Hong Kim; Sung Han Lee; Yong Rok Kim; Jae Shi Choi

doi:10.1016/0021-9517(84)90004-6

Kinetics and mechanism of the oxidation of carbon monoxide over cadmium oxide-lanthanum sesquioxide system

Keu Hong Kim, Sung Han Lee, Yong Rok Kim, Jae Shi Choi

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The oxidation of carbon monoxide by gaseous oxygen in the presence of a powdered Cd-doped La₂O₃ catalyst has been investigated in the temperature range from 300 to 450 °C under various CO and O₂ partial pressures. The conductivity of Cd-doped La₂O₃ has been measured at 450 °C under various CO and O₂ pressures. The oxidation rates have been correlated with 1.5-order kinetics; the first-order with respect to CO and the 0.5-order with respect to O₂. For the above temperature range, the activation energy is around 11.3 kcal · mol^-1. CO appears essentially to be chemisorbed on the lattice oxygens of the Cd-doped La₂O₃, while O₂ adsorbs as ions on the oxygen vacancies induced by Cd-doping. The agreement between the kinetic data and conductivities supports the proposed oxidation mechanism and the dominant defect of Cd-doped La₂O₃.

Original language	English
Pages (from-to)	283-288
Number of pages	6
Journal	Journal of Catalysis
Volume	88
Issue number	2
DOIs	https://doi.org/10.1016/0021-9517(84)90004-6
Publication status	Published - 1984 Aug

Bibliographical note

Funding Information:
We are grateful to the Ministry of Education of Korea for financial support and to Dr. Young Hwan Kang and Professor Ki Hyun Yoon for helpful discussions.

All Science Journal Classification (ASJC) codes

Catalysis
Physical and Theoretical Chemistry

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10.1016/0021-9517(84)90004-6

Cite this

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title = "Kinetics and mechanism of the oxidation of carbon monoxide over cadmium oxide-lanthanum sesquioxide system",

abstract = "The oxidation of carbon monoxide by gaseous oxygen in the presence of a powdered Cd-doped La2O3 catalyst has been investigated in the temperature range from 300 to 450 °C under various CO and O2 partial pressures. The conductivity of Cd-doped La2O3 has been measured at 450 °C under various CO and O2 pressures. The oxidation rates have been correlated with 1.5-order kinetics; the first-order with respect to CO and the 0.5-order with respect to O2. For the above temperature range, the activation energy is around 11.3 kcal · mol-1. CO appears essentially to be chemisorbed on the lattice oxygens of the Cd-doped La2O3, while O2 adsorbs as ions on the oxygen vacancies induced by Cd-doping. The agreement between the kinetic data and conductivities supports the proposed oxidation mechanism and the dominant defect of Cd-doped La2O3.",

author = "Kim, {Keu Hong} and Lee, {Sung Han} and Kim, {Yong Rok} and Choi, {Jae Shi}",

note = "Funding Information: We are grateful to the Ministry of Education of Korea for financial support and to Dr. Young Hwan Kang and Professor Ki Hyun Yoon for helpful discussions.",

year = "1984",

month = aug,

doi = "10.1016/0021-9517(84)90004-6",

language = "English",

volume = "88",

pages = "283--288",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

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T1 - Kinetics and mechanism of the oxidation of carbon monoxide over cadmium oxide-lanthanum sesquioxide system

AU - Kim, Keu Hong

AU - Lee, Sung Han

AU - Kim, Yong Rok

AU - Choi, Jae Shi

N1 - Funding Information: We are grateful to the Ministry of Education of Korea for financial support and to Dr. Young Hwan Kang and Professor Ki Hyun Yoon for helpful discussions.

PY - 1984/8

Y1 - 1984/8

N2 - The oxidation of carbon monoxide by gaseous oxygen in the presence of a powdered Cd-doped La2O3 catalyst has been investigated in the temperature range from 300 to 450 °C under various CO and O2 partial pressures. The conductivity of Cd-doped La2O3 has been measured at 450 °C under various CO and O2 pressures. The oxidation rates have been correlated with 1.5-order kinetics; the first-order with respect to CO and the 0.5-order with respect to O2. For the above temperature range, the activation energy is around 11.3 kcal · mol-1. CO appears essentially to be chemisorbed on the lattice oxygens of the Cd-doped La2O3, while O2 adsorbs as ions on the oxygen vacancies induced by Cd-doping. The agreement between the kinetic data and conductivities supports the proposed oxidation mechanism and the dominant defect of Cd-doped La2O3.

AB - The oxidation of carbon monoxide by gaseous oxygen in the presence of a powdered Cd-doped La2O3 catalyst has been investigated in the temperature range from 300 to 450 °C under various CO and O2 partial pressures. The conductivity of Cd-doped La2O3 has been measured at 450 °C under various CO and O2 pressures. The oxidation rates have been correlated with 1.5-order kinetics; the first-order with respect to CO and the 0.5-order with respect to O2. For the above temperature range, the activation energy is around 11.3 kcal · mol-1. CO appears essentially to be chemisorbed on the lattice oxygens of the Cd-doped La2O3, while O2 adsorbs as ions on the oxygen vacancies induced by Cd-doping. The agreement between the kinetic data and conductivities supports the proposed oxidation mechanism and the dominant defect of Cd-doped La2O3.

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Kinetics and mechanism of the oxidation of carbon monoxide over cadmium oxide-lanthanum sesquioxide system

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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