A crucial role for the CeO2-ZrO2 support for the low temperature water gas shift reaction over Cu-CeO2-ZrO2 catalysts

Dae Woon Jeong, Hyun Suk Na, Jae Oh Shim, Won Jun Jang, Hyun Seog Roh

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A co-precipitation method was employed to prepare Cu dispersed on CeO2, ZrO2 and CeO2-ZrO2 supports to obtain catalysts useful for the low temperature water gas shift (WGS) reaction. To optimize the Cu-CeO2-ZrO2 catalysts, the CeO2/ZrO2 ratio was systematically changed. The cubic phase Cu-Ce0.8Zr0.2O2 catalyst exhibited the highest turnover frequency and the lowest activation energy among the catalysts tested and its CO conversion was maintained without significant loss during the reaction for 100 h. The enhanced catalytic activity and stability of the co-precipitated Cu-Ce0.8Zr0.2O2 was mainly attributed to an enhanced oxygen mobility and a strong resistance against the sintering of Cu, resulting from a large amount of defect oxygen and the strong interaction between CuO and cubic phase Ce0.8Zr0.2O2.

Original languageEnglish
Pages (from-to)3706-3713
Number of pages8
JournalCatalysis Science and Technology
Volume5
Issue number7
DOIs
Publication statusPublished - 2015 Jul 1

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Water gas shift
Catalysts
Oxygen
Temperature
Carbon Monoxide
Coprecipitation
Catalyst supports
Catalyst activity
Sintering
Activation energy
Defects

All Science Journal Classification (ASJC) codes

  • Catalysis

Cite this

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abstract = "A co-precipitation method was employed to prepare Cu dispersed on CeO2, ZrO2 and CeO2-ZrO2 supports to obtain catalysts useful for the low temperature water gas shift (WGS) reaction. To optimize the Cu-CeO2-ZrO2 catalysts, the CeO2/ZrO2 ratio was systematically changed. The cubic phase Cu-Ce0.8Zr0.2O2 catalyst exhibited the highest turnover frequency and the lowest activation energy among the catalysts tested and its CO conversion was maintained without significant loss during the reaction for 100 h. The enhanced catalytic activity and stability of the co-precipitated Cu-Ce0.8Zr0.2O2 was mainly attributed to an enhanced oxygen mobility and a strong resistance against the sintering of Cu, resulting from a large amount of defect oxygen and the strong interaction between CuO and cubic phase Ce0.8Zr0.2O2.",
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A crucial role for the CeO2-ZrO2 support for the low temperature water gas shift reaction over Cu-CeO2-ZrO2 catalysts. / Jeong, Dae Woon; Na, Hyun Suk; Shim, Jae Oh; Jang, Won Jun; Roh, Hyun Seog.

In: Catalysis Science and Technology, Vol. 5, No. 7, 01.07.2015, p. 3706-3713.

Research output: Contribution to journalArticle

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AU - Jeong, Dae Woon

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AU - Roh, Hyun Seog

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AB - A co-precipitation method was employed to prepare Cu dispersed on CeO2, ZrO2 and CeO2-ZrO2 supports to obtain catalysts useful for the low temperature water gas shift (WGS) reaction. To optimize the Cu-CeO2-ZrO2 catalysts, the CeO2/ZrO2 ratio was systematically changed. The cubic phase Cu-Ce0.8Zr0.2O2 catalyst exhibited the highest turnover frequency and the lowest activation energy among the catalysts tested and its CO conversion was maintained without significant loss during the reaction for 100 h. The enhanced catalytic activity and stability of the co-precipitated Cu-Ce0.8Zr0.2O2 was mainly attributed to an enhanced oxygen mobility and a strong resistance against the sintering of Cu, resulting from a large amount of defect oxygen and the strong interaction between CuO and cubic phase Ce0.8Zr0.2O2.

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