Promotion of N2O decomposition by Zr4+-doped CeO2 used as support of Rh catalyst

Min Jae Kim; Hye Jeong Kim; Seung Jae Lee; In Soo Ryu; Hyung Chul Yoon; Ki Bong Lee; Sang Goo Jeon

doi:10.1016/j.catcom.2019.105764

Promotion of N₂O decomposition by Zr⁴⁺-doped CeO₂ used as support of Rh catalyst

Min Jae Kim, Hye Jeong Kim, Seung Jae Lee, In Soo Ryu, Hyung Chul Yoon, Ki Bong Lee, Sang Goo Jeon

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

A series of Ce_1-xZr_xO₂ -supported Rh catalysts was prepared and their catalytic efficiencies for N₂O decomposition was determined in the 200–400 °C range. The activity of this catalytic system was found to be largely influenced by the Ce:Zr weight ratio. The Rh/Ce-ZrO₂ catalyst with a small amount of ZrO₂ showed a significantly improved activity performance than the Rh/CeO₂ catalyst, particularly when O₂ or H₂O were present in the feed gas of N₂O. H₂ temperature-programmed reduction and X-ray photoelectron spectroscopy studies showed that the incorporation of Zr⁴⁺ in the CeO₂ lattice used as support of Rh catalyst improved Rh dispersion and redox ability, and stabilized Rh³⁺ species on the catalyst surface.

Original language	English
Article number	105764
Journal	Catalysis Communications
Volume	130
DOIs	https://doi.org/10.1016/j.catcom.2019.105764
Publication status	Published - 2019 Oct

Keywords

Ce–ZrO support
HO-tolerance in deNO
NO decomposition
Rh catalyst

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Process Chemistry and Technology

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Kim, M. J., Kim, H. J., Lee, S. J., Ryu, I. S., Yoon, H. C., Lee, K. B., & Jeon, S. G. (2019). Promotion of N₂O decomposition by Zr⁴⁺-doped CeO₂ used as support of Rh catalyst. Catalysis Communications, 130, [105764]. https://doi.org/10.1016/j.catcom.2019.105764

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title = "Promotion of N2O decomposition by Zr4+-doped CeO2 used as support of Rh catalyst",

abstract = "A series of Ce1-xZrxO2 -supported Rh catalysts was prepared and their catalytic efficiencies for N2O decomposition was determined in the 200–400 °C range. The activity of this catalytic system was found to be largely influenced by the Ce:Zr weight ratio. The Rh/Ce-ZrO2 catalyst with a small amount of ZrO2 showed a significantly improved activity performance than the Rh/CeO2 catalyst, particularly when O2 or H2O were present in the feed gas of N2O. H2 temperature-programmed reduction and X-ray photoelectron spectroscopy studies showed that the incorporation of Zr4+ in the CeO2 lattice used as support of Rh catalyst improved Rh dispersion and redox ability, and stabilized Rh3+ species on the catalyst surface.",

keywords = "Ce–ZrO support, HO-tolerance in deNO, NO decomposition, Rh catalyst",

author = "Kim, {Min Jae} and Kim, {Hye Jeong} and Lee, {Seung Jae} and Ryu, {In Soo} and Yoon, {Hyung Chul} and Lee, {Ki Bong} and Jeon, {Sang Goo}",

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AU - Kim, Min Jae

AU - Kim, Hye Jeong

AU - Lee, Seung Jae

AU - Ryu, In Soo

AU - Yoon, Hyung Chul

AU - Lee, Ki Bong

AU - Jeon, Sang Goo

PY - 2019/10

Y1 - 2019/10

N2 - A series of Ce1-xZrxO2 -supported Rh catalysts was prepared and their catalytic efficiencies for N2O decomposition was determined in the 200–400 °C range. The activity of this catalytic system was found to be largely influenced by the Ce:Zr weight ratio. The Rh/Ce-ZrO2 catalyst with a small amount of ZrO2 showed a significantly improved activity performance than the Rh/CeO2 catalyst, particularly when O2 or H2O were present in the feed gas of N2O. H2 temperature-programmed reduction and X-ray photoelectron spectroscopy studies showed that the incorporation of Zr4+ in the CeO2 lattice used as support of Rh catalyst improved Rh dispersion and redox ability, and stabilized Rh3+ species on the catalyst surface.

AB - A series of Ce1-xZrxO2 -supported Rh catalysts was prepared and their catalytic efficiencies for N2O decomposition was determined in the 200–400 °C range. The activity of this catalytic system was found to be largely influenced by the Ce:Zr weight ratio. The Rh/Ce-ZrO2 catalyst with a small amount of ZrO2 showed a significantly improved activity performance than the Rh/CeO2 catalyst, particularly when O2 or H2O were present in the feed gas of N2O. H2 temperature-programmed reduction and X-ray photoelectron spectroscopy studies showed that the incorporation of Zr4+ in the CeO2 lattice used as support of Rh catalyst improved Rh dispersion and redox ability, and stabilized Rh3+ species on the catalyst surface.

KW - Ce–ZrO support

KW - HO-tolerance in deNO

KW - NO decomposition

KW - Rh catalyst

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