Enhancing the catalytic performance of cobalt oxide by doping on ceria in the high temperature water-gas shift reaction

Ajay Jha; Dae Woon Jeong; Yeol Lim Lee; In Wook Nah; Hyun Seog Roh

doi:10.1039/c5ra22704f

Enhancing the catalytic performance of cobalt oxide by doping on ceria in the high temperature water-gas shift reaction

Ajay Jha, Dae Woon Jeong, Yeol Lim Lee, In Wook Nah, Hyun Seog Roh

Division of Environmental Engineering

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

53 Citations (Scopus)

Abstract

The high temperature water-gas shift (HT-WGS) reaction was performed using a Co-CeO₂ catalyst, prepared through a co-precipitation method. The catalyst showed stable activity performance at 400°C with 90% CO conversion without any side reactions (methanation) at a very high GHSV of 143 000 h^-1, which is the highest value reported for the HT-WGS reaction. This remarkable performance is attributed to the superior reducible nature of ceria and the preferential exposure of (220) and (112) facets of CeO₂ and Co₃O₄, respectively. The time-on-stream study substantiates that ceria stabilizes the surface area of the Co-CeO₂ catalyst during the WGS reaction compared to the bulk Co₃O₄.

Original language	English
Pages (from-to)	103023-103029
Number of pages	7
Journal	RSC Advances
Volume	5
Issue number	125
DOIs	https://doi.org/10.1039/c5ra22704f
Publication status	Published - 2015 Nov 27

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Publisher Copyright:
© The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)

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10.1039/c5ra22704f

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title = "Enhancing the catalytic performance of cobalt oxide by doping on ceria in the high temperature water-gas shift reaction",

abstract = "The high temperature water-gas shift (HT-WGS) reaction was performed using a Co-CeO2 catalyst, prepared through a co-precipitation method. The catalyst showed stable activity performance at 400°C with 90% CO conversion without any side reactions (methanation) at a very high GHSV of 143 000 h-1, which is the highest value reported for the HT-WGS reaction. This remarkable performance is attributed to the superior reducible nature of ceria and the preferential exposure of (220) and (112) facets of CeO2 and Co3O4, respectively. The time-on-stream study substantiates that ceria stabilizes the surface area of the Co-CeO2 catalyst during the WGS reaction compared to the bulk Co3O4.",

author = "Ajay Jha and Jeong, {Dae Woon} and Lee, {Yeol Lim} and Nah, {In Wook} and Roh, {Hyun Seog}",

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T1 - Enhancing the catalytic performance of cobalt oxide by doping on ceria in the high temperature water-gas shift reaction

AU - Jha, Ajay

AU - Jeong, Dae Woon

AU - Lee, Yeol Lim

AU - Nah, In Wook

AU - Roh, Hyun Seog

PY - 2015/11/27

Y1 - 2015/11/27

N2 - The high temperature water-gas shift (HT-WGS) reaction was performed using a Co-CeO2 catalyst, prepared through a co-precipitation method. The catalyst showed stable activity performance at 400°C with 90% CO conversion without any side reactions (methanation) at a very high GHSV of 143 000 h-1, which is the highest value reported for the HT-WGS reaction. This remarkable performance is attributed to the superior reducible nature of ceria and the preferential exposure of (220) and (112) facets of CeO2 and Co3O4, respectively. The time-on-stream study substantiates that ceria stabilizes the surface area of the Co-CeO2 catalyst during the WGS reaction compared to the bulk Co3O4.

AB - The high temperature water-gas shift (HT-WGS) reaction was performed using a Co-CeO2 catalyst, prepared through a co-precipitation method. The catalyst showed stable activity performance at 400°C with 90% CO conversion without any side reactions (methanation) at a very high GHSV of 143 000 h-1, which is the highest value reported for the HT-WGS reaction. This remarkable performance is attributed to the superior reducible nature of ceria and the preferential exposure of (220) and (112) facets of CeO2 and Co3O4, respectively. The time-on-stream study substantiates that ceria stabilizes the surface area of the Co-CeO2 catalyst during the WGS reaction compared to the bulk Co3O4.

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Enhancing the catalytic performance of cobalt oxide by doping on ceria in the high temperature water-gas shift reaction

Abstract

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