Abstract
The fine kinetics of carbon monoxide oxidation over two differently prepared zinc oxides, Kadox ZnO (K25-ZnO) and Kanto Chemical Co. ZnO (Kan-ZnO), have been investigated and compared in detail using the steady-state and the transient-response methods. The morphology based on scanning electron micrographs showed fine crystallites with high surface area, 20 m2 g-1 for K25-ZnO and 4.0 m2 g-1 for Kan-ZnO, even though they gave the same X-ray diffraction pattern of wurtzite-type crystalline structure. Extraordinary differences in the steady-state rate surfaces for the two catalysts were found, being first order with respect to PCO and zero order with respect to P O2 for Kan-ZnO, and having an anomalous tendency with respect to PCO, indicating both a maximum and a minimum, for K25-ZnO. Based on the electrical conductivity measurements of the catalysts and the characteristics of the transientresponse curves obtained, two reaction path models for the two catalysts have been proposed relating to two different oxygen species. All kinetic parameters evaluated from experimental data consistently explain both the steady-state rate data and the characteristic modes of transient-response curves obtained.
| Original language | English |
|---|---|
| Pages (from-to) | 1391-1398 |
| Number of pages | 8 |
| Journal | Journal of the Chemical Society, Faraday Transactions |
| Volume | 91 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1995 |
| Externally published | Yes |
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- Physical and Theoretical Chemistry
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Diversity of the kinetics of carbon monoxide oxidation on differently prepared zinc oxides. / Kobayashi, Masayoshi; Golman, Boris; Kanno, Tohru.
In: Journal of the Chemical Society, Faraday Transactions, Vol. 91, No. 9, 1995, p. 1391-1398.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Diversity of the kinetics of carbon monoxide oxidation on differently prepared zinc oxides
AU - Kobayashi, Masayoshi
AU - Golman, Boris
AU - Kanno, Tohru
PY - 1995
Y1 - 1995
N2 - The fine kinetics of carbon monoxide oxidation over two differently prepared zinc oxides, Kadox ZnO (K25-ZnO) and Kanto Chemical Co. ZnO (Kan-ZnO), have been investigated and compared in detail using the steady-state and the transient-response methods. The morphology based on scanning electron micrographs showed fine crystallites with high surface area, 20 m2 g-1 for K25-ZnO and 4.0 m2 g-1 for Kan-ZnO, even though they gave the same X-ray diffraction pattern of wurtzite-type crystalline structure. Extraordinary differences in the steady-state rate surfaces for the two catalysts were found, being first order with respect to PCO and zero order with respect to P O2 for Kan-ZnO, and having an anomalous tendency with respect to PCO, indicating both a maximum and a minimum, for K25-ZnO. Based on the electrical conductivity measurements of the catalysts and the characteristics of the transientresponse curves obtained, two reaction path models for the two catalysts have been proposed relating to two different oxygen species. All kinetic parameters evaluated from experimental data consistently explain both the steady-state rate data and the characteristic modes of transient-response curves obtained.
AB - The fine kinetics of carbon monoxide oxidation over two differently prepared zinc oxides, Kadox ZnO (K25-ZnO) and Kanto Chemical Co. ZnO (Kan-ZnO), have been investigated and compared in detail using the steady-state and the transient-response methods. The morphology based on scanning electron micrographs showed fine crystallites with high surface area, 20 m2 g-1 for K25-ZnO and 4.0 m2 g-1 for Kan-ZnO, even though they gave the same X-ray diffraction pattern of wurtzite-type crystalline structure. Extraordinary differences in the steady-state rate surfaces for the two catalysts were found, being first order with respect to PCO and zero order with respect to P O2 for Kan-ZnO, and having an anomalous tendency with respect to PCO, indicating both a maximum and a minimum, for K25-ZnO. Based on the electrical conductivity measurements of the catalysts and the characteristics of the transientresponse curves obtained, two reaction path models for the two catalysts have been proposed relating to two different oxygen species. All kinetic parameters evaluated from experimental data consistently explain both the steady-state rate data and the characteristic modes of transient-response curves obtained.
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UR - http://www.scopus.com/inward/citedby.url?scp=10044295641&partnerID=8YFLogxK
U2 - 10.1039/FT9959101391
DO - 10.1039/FT9959101391
M3 - Article
AN - SCOPUS:10044295641
VL - 91
SP - 1391
EP - 1398
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 9
ER -