Hydrogen production by the water-gas shift reaction using CuNi/Fe2O3 catalyst

Ajay Jha; Dae Woon Jeong; Jae Oh Shim; Won Jun Jang; Yeol Lim Lee; Chandrashekhar V. Rode; Hyun Seog Roh

doi:10.1039/c5cy00173k

Hydrogen production by the water-gas shift reaction using CuNi/Fe₂O₃ catalyst

Ajay Jha, Dae Woon Jeong, Jae Oh Shim, Won Jun Jang, Yeol Lim Lee, Chandrashekhar V. Rode, Hyun Seog Roh

Division of Environmental Engineering

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

76 Citations (Scopus)

Abstract

Incorporation of both Cu and Ni together into the crystalline lattice of Fe₂O₃ results in a significant increase in the catalytic activity and also suppresses the methanation reaction in the high-temperature water-gas shift (HT-WGS) reaction. CuNi/Fe₂O₃ exhibited the highest CO conversion with negligible CH₄ selectivity at the extremely high GHSV of 101 000 h^-1 (X_CO = 85% at 400 °C). The high activity of CuNi/Fe₂O₃ catalyst is mainly due to the increase in the lattice strain and the decrease in the binding energy of lattice oxygen. In addition, X-ray photoelectron spectroscopy (XPS) results provide direct evidence for the formation of surface CuNi alloy, which plays a critical role in suppressing the methanation reaction. The detailed characterization by powder X-ray diffraction (XRD), XPS, BET, and H₂ temperature-programmed reduction (TPR) techniques was used to understand the role of dopants on host iron oxides in the enhancement of catalytic activity for HT-WGS reaction.

Original language	English
Pages (from-to)	2752-2760
Number of pages	9
Journal	Catalysis Science and Technology
Volume	5
Issue number	5
DOIs	https://doi.org/10.1039/c5cy00173k
Publication status	Published - 2015 May 1

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2015.

All Science Journal Classification (ASJC) codes

Catalysis

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10.1039/c5cy00173k

Cite this

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title = "Hydrogen production by the water-gas shift reaction using CuNi/Fe2O3 catalyst",

abstract = "Incorporation of both Cu and Ni together into the crystalline lattice of Fe2O3 results in a significant increase in the catalytic activity and also suppresses the methanation reaction in the high-temperature water-gas shift (HT-WGS) reaction. CuNi/Fe2O3 exhibited the highest CO conversion with negligible CH4 selectivity at the extremely high GHSV of 101 000 h-1 (XCO = 85% at 400 °C). The high activity of CuNi/Fe2O3 catalyst is mainly due to the increase in the lattice strain and the decrease in the binding energy of lattice oxygen. In addition, X-ray photoelectron spectroscopy (XPS) results provide direct evidence for the formation of surface CuNi alloy, which plays a critical role in suppressing the methanation reaction. The detailed characterization by powder X-ray diffraction (XRD), XPS, BET, and H2 temperature-programmed reduction (TPR) techniques was used to understand the role of dopants on host iron oxides in the enhancement of catalytic activity for HT-WGS reaction.",

author = "Ajay Jha and Jeong, {Dae Woon} and Shim, {Jae Oh} and Jang, {Won Jun} and Lee, {Yeol Lim} and Rode, {Chandrashekhar V.} and Roh, {Hyun Seog}",

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AU - Jha, Ajay

AU - Jeong, Dae Woon

AU - Shim, Jae Oh

AU - Jang, Won Jun

AU - Lee, Yeol Lim

AU - Rode, Chandrashekhar V.

AU - Roh, Hyun Seog

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Incorporation of both Cu and Ni together into the crystalline lattice of Fe2O3 results in a significant increase in the catalytic activity and also suppresses the methanation reaction in the high-temperature water-gas shift (HT-WGS) reaction. CuNi/Fe2O3 exhibited the highest CO conversion with negligible CH4 selectivity at the extremely high GHSV of 101 000 h-1 (XCO = 85% at 400 °C). The high activity of CuNi/Fe2O3 catalyst is mainly due to the increase in the lattice strain and the decrease in the binding energy of lattice oxygen. In addition, X-ray photoelectron spectroscopy (XPS) results provide direct evidence for the formation of surface CuNi alloy, which plays a critical role in suppressing the methanation reaction. The detailed characterization by powder X-ray diffraction (XRD), XPS, BET, and H2 temperature-programmed reduction (TPR) techniques was used to understand the role of dopants on host iron oxides in the enhancement of catalytic activity for HT-WGS reaction.

AB - Incorporation of both Cu and Ni together into the crystalline lattice of Fe2O3 results in a significant increase in the catalytic activity and also suppresses the methanation reaction in the high-temperature water-gas shift (HT-WGS) reaction. CuNi/Fe2O3 exhibited the highest CO conversion with negligible CH4 selectivity at the extremely high GHSV of 101 000 h-1 (XCO = 85% at 400 °C). The high activity of CuNi/Fe2O3 catalyst is mainly due to the increase in the lattice strain and the decrease in the binding energy of lattice oxygen. In addition, X-ray photoelectron spectroscopy (XPS) results provide direct evidence for the formation of surface CuNi alloy, which plays a critical role in suppressing the methanation reaction. The detailed characterization by powder X-ray diffraction (XRD), XPS, BET, and H2 temperature-programmed reduction (TPR) techniques was used to understand the role of dopants on host iron oxides in the enhancement of catalytic activity for HT-WGS reaction.

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