Importance of surface hydrogen concentration in enhancing activity of CoNi alloy catalyst for CO hydrogenation

Tatsumi Ishihara; Koichi Eguchi; Hiromichi Arai

doi:10.1016/0304-5102(92)80050-Q

Importance of surface hydrogen concentration in enhancing activity of CoNi alloy catalyst for CO hydrogenation

Tatsumi Ishihara, Koichi Eguchi, Hiromichi Arai

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Abstract

The hydrogen-deuterium exchange reaction was employed for studying the reactivity of adsorbed hydrogen on CoNi alloy. The infrared spectra of adsorbed NO indicates that the support oxide electronically interacts with the CONi alloy. Desorption measurements suggest that the electron density of the alloy greatly influences the surface coverage of hydrogen and carbon monoxide. The CO hydrogenation rate of CoNi alloy in the presence of CO was shown to be related to the H₂D₂ exchange rate. The dissociative adsorption of hydrogen in the presence of CO is of primary importance in determining the CO hydrogenation rate of the CoNi alloy system, since the preadsorbed CO species strongly hinder the hydrogen adsorption. A high surface concentration of active hydrogen in the presence of CO leads to high catalytic activity for CO hydrogenation on CoNi alloy.

Original language	English
Pages (from-to)	253-261
Number of pages	9
Journal	Journal of Molecular Catalysis
Volume	72
Issue number	2
DOIs	https://doi.org/10.1016/0304-5102(92)80050-Q
Publication status	Published - Mar 1 1992

All Science Journal Classification (ASJC) codes

Engineering(all)

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10.1016/0304-5102(92)80050-Q

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title = "Importance of surface hydrogen concentration in enhancing activity of CoNi alloy catalyst for CO hydrogenation",

abstract = "The hydrogen-deuterium exchange reaction was employed for studying the reactivity of adsorbed hydrogen on CoNi alloy. The infrared spectra of adsorbed NO indicates that the support oxide electronically interacts with the CONi alloy. Desorption measurements suggest that the electron density of the alloy greatly influences the surface coverage of hydrogen and carbon monoxide. The CO hydrogenation rate of CoNi alloy in the presence of CO was shown to be related to the H2D2 exchange rate. The dissociative adsorption of hydrogen in the presence of CO is of primary importance in determining the CO hydrogenation rate of the CoNi alloy system, since the preadsorbed CO species strongly hinder the hydrogen adsorption. A high surface concentration of active hydrogen in the presence of CO leads to high catalytic activity for CO hydrogenation on CoNi alloy.",

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T1 - Importance of surface hydrogen concentration in enhancing activity of CoNi alloy catalyst for CO hydrogenation

AU - Ishihara, Tatsumi

AU - Eguchi, Koichi

AU - Arai, Hiromichi

PY - 1992/3/1

Y1 - 1992/3/1

N2 - The hydrogen-deuterium exchange reaction was employed for studying the reactivity of adsorbed hydrogen on CoNi alloy. The infrared spectra of adsorbed NO indicates that the support oxide electronically interacts with the CONi alloy. Desorption measurements suggest that the electron density of the alloy greatly influences the surface coverage of hydrogen and carbon monoxide. The CO hydrogenation rate of CoNi alloy in the presence of CO was shown to be related to the H2D2 exchange rate. The dissociative adsorption of hydrogen in the presence of CO is of primary importance in determining the CO hydrogenation rate of the CoNi alloy system, since the preadsorbed CO species strongly hinder the hydrogen adsorption. A high surface concentration of active hydrogen in the presence of CO leads to high catalytic activity for CO hydrogenation on CoNi alloy.

AB - The hydrogen-deuterium exchange reaction was employed for studying the reactivity of adsorbed hydrogen on CoNi alloy. The infrared spectra of adsorbed NO indicates that the support oxide electronically interacts with the CONi alloy. Desorption measurements suggest that the electron density of the alloy greatly influences the surface coverage of hydrogen and carbon monoxide. The CO hydrogenation rate of CoNi alloy in the presence of CO was shown to be related to the H2D2 exchange rate. The dissociative adsorption of hydrogen in the presence of CO is of primary importance in determining the CO hydrogenation rate of the CoNi alloy system, since the preadsorbed CO species strongly hinder the hydrogen adsorption. A high surface concentration of active hydrogen in the presence of CO leads to high catalytic activity for CO hydrogenation on CoNi alloy.

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Importance of surface hydrogen concentration in enhancing activity of CoNi alloy catalyst for CO hydrogenation

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