Low temperature selective CO oxidation in excess of H2 over Pt/Ce-ZrO2 catalysts

Hyun Seog Roh; H. S. Potdar; Ki Won Jun; Sang Yun Han; Jae Woo Kim

doi:10.1023/b:catl.0000017077.38760.1f

Low temperature selective CO oxidation in excess of H₂ over Pt/Ce-ZrO₂ catalysts

Hyun Seog Roh, H. S. Potdar, Ki Won Jun, Sang Yun Han, Jae Woo Kim

Division of Environmental Engineering

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

25 Citations (Scopus)

Abstract

Pt/Ce-ZrO₂ catalysts have been designed and applied to selective CO oxidation at low temperature. Both tetragonal and cubic phase Ce-ZrO ₂ supports were prepared by co-precipitation method to get high surface area materials after calcination at 500°C for 6 h in air. Selective CO oxidation was conducted using stoichiometric amounts of O₂. Cubic Ce-ZrO₂ supported Pt catalyst exhibited 78% CO conversion and 96% CO₂ selectivity even at 60°C, while Pt/Al₂O ₃ catalyst showed less than 1% CO conversion at the same condition. The higher CO conversion and CO₂ selectivity (to CO₂ as opposed to H₂O) of Pt/Ce-ZrO₂ catalyst is mainly due to the high oxygen storage capacity of Ce-ZrO₂ and nano-crystalline nature of cubic Ce_0.8Zr_0.2O₂.

Original language	English
Pages (from-to)	203-207
Number of pages	5
Journal	Catalysis Letters
Volume	93
Issue number	3-4
DOIs	https://doi.org/10.1023/b:catl.0000017077.38760.1f
Publication status	Published - 2004 Mar

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

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Cite this

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title = "Low temperature selective CO oxidation in excess of H2 over Pt/Ce-ZrO2 catalysts",

abstract = "Pt/Ce-ZrO2 catalysts have been designed and applied to selective CO oxidation at low temperature. Both tetragonal and cubic phase Ce-ZrO 2 supports were prepared by co-precipitation method to get high surface area materials after calcination at 500°C for 6 h in air. Selective CO oxidation was conducted using stoichiometric amounts of O2. Cubic Ce-ZrO2 supported Pt catalyst exhibited 78% CO conversion and 96% CO2 selectivity even at 60°C, while Pt/Al2O 3 catalyst showed less than 1% CO conversion at the same condition. The higher CO conversion and CO2 selectivity (to CO2 as opposed to H2O) of Pt/Ce-ZrO2 catalyst is mainly due to the high oxygen storage capacity of Ce-ZrO2 and nano-crystalline nature of cubic Ce0.8Zr0.2O2.",

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T1 - Low temperature selective CO oxidation in excess of H2 over Pt/Ce-ZrO2 catalysts

AU - Roh, Hyun Seog

AU - Potdar, H. S.

AU - Jun, Ki Won

AU - Han, Sang Yun

AU - Kim, Jae Woo

PY - 2004/3

Y1 - 2004/3

N2 - Pt/Ce-ZrO2 catalysts have been designed and applied to selective CO oxidation at low temperature. Both tetragonal and cubic phase Ce-ZrO 2 supports were prepared by co-precipitation method to get high surface area materials after calcination at 500°C for 6 h in air. Selective CO oxidation was conducted using stoichiometric amounts of O2. Cubic Ce-ZrO2 supported Pt catalyst exhibited 78% CO conversion and 96% CO2 selectivity even at 60°C, while Pt/Al2O 3 catalyst showed less than 1% CO conversion at the same condition. The higher CO conversion and CO2 selectivity (to CO2 as opposed to H2O) of Pt/Ce-ZrO2 catalyst is mainly due to the high oxygen storage capacity of Ce-ZrO2 and nano-crystalline nature of cubic Ce0.8Zr0.2O2.

AB - Pt/Ce-ZrO2 catalysts have been designed and applied to selective CO oxidation at low temperature. Both tetragonal and cubic phase Ce-ZrO 2 supports were prepared by co-precipitation method to get high surface area materials after calcination at 500°C for 6 h in air. Selective CO oxidation was conducted using stoichiometric amounts of O2. Cubic Ce-ZrO2 supported Pt catalyst exhibited 78% CO conversion and 96% CO2 selectivity even at 60°C, while Pt/Al2O 3 catalyst showed less than 1% CO conversion at the same condition. The higher CO conversion and CO2 selectivity (to CO2 as opposed to H2O) of Pt/Ce-ZrO2 catalyst is mainly due to the high oxygen storage capacity of Ce-ZrO2 and nano-crystalline nature of cubic Ce0.8Zr0.2O2.

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Low temperature selective CO oxidation in excess of H₂ over Pt/Ce-ZrO₂ catalysts

Abstract

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