Isotope exchange reaction of formate with molecular hydrogen on Ni(110) by IRAS

Akira Yamakata; Jun Kubota; Junko N. Kondo; Kazunari Domen; Chiaki Hirose

doi:10.1021/jp9611986

Isotope exchange reaction of formate with molecular hydrogen on Ni(110) by IRAS

Akira Yamakata, Jun Kubota, Junko N. Kondo, Kazunari Domen, Chiaki Hirose

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Abstract

Kinetics of the CH/CD isotope exchange reaction of formate (HCOO(a)/DCOO(a)) on Ni(110) with gaseous D₂/H₂ was investigated below the decomposition temperature (360 K) by infrared reflection absorption spectroscopy (IRAS). The apparent activation energies of HCOO(a) → DCOO (a) and DCOO(a) → HCOO-(a) reactions were derived as 52 ± 5 and 58 ± 5 kJ·mol^-1, respectively. A half-order dependence of the reaction rate on hydrogen pressure was observed, suggesting that the rate-determining step was the reaction of the adsorbed formate with reversibly adsorbed hydrogen atom. The reaction of HCOO(a) with D₂ was 2.1 ± 0.3 times faster than that of DCOO(a) with H₂ at 300 K, and the origin of the isotope effect is discussed.

Original language	English
Pages (from-to)	18177-18182
Number of pages	6
Journal	Journal of Physical Chemistry
Volume	100
Issue number	46
DOIs	https://doi.org/10.1021/jp9611986
Publication status	Published - Nov 14 1996
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physical and Theoretical Chemistry

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@article{81e92efc1fbd4309a1938fb62eb15a40,

title = "Isotope exchange reaction of formate with molecular hydrogen on Ni(110) by IRAS",

abstract = "Kinetics of the CH/CD isotope exchange reaction of formate (HCOO(a)/DCOO(a)) on Ni(110) with gaseous D2/H2 was investigated below the decomposition temperature (360 K) by infrared reflection absorption spectroscopy (IRAS). The apparent activation energies of HCOO(a) → DCOO (a) and DCOO(a) → HCOO-(a) reactions were derived as 52 ± 5 and 58 ± 5 kJ·mol-1, respectively. A half-order dependence of the reaction rate on hydrogen pressure was observed, suggesting that the rate-determining step was the reaction of the adsorbed formate with reversibly adsorbed hydrogen atom. The reaction of HCOO(a) with D2 was 2.1 ± 0.3 times faster than that of DCOO(a) with H2 at 300 K, and the origin of the isotope effect is discussed.",

author = "Akira Yamakata and Jun Kubota and Kondo, {Junko N.} and Kazunari Domen and Chiaki Hirose",

year = "1996",

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doi = "10.1021/jp9611986",

language = "English",

volume = "100",

pages = "18177--18182",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Isotope exchange reaction of formate with molecular hydrogen on Ni(110) by IRAS

AU - Yamakata, Akira

AU - Kubota, Jun

AU - Kondo, Junko N.

AU - Domen, Kazunari

AU - Hirose, Chiaki

PY - 1996/11/14

Y1 - 1996/11/14

N2 - Kinetics of the CH/CD isotope exchange reaction of formate (HCOO(a)/DCOO(a)) on Ni(110) with gaseous D2/H2 was investigated below the decomposition temperature (360 K) by infrared reflection absorption spectroscopy (IRAS). The apparent activation energies of HCOO(a) → DCOO (a) and DCOO(a) → HCOO-(a) reactions were derived as 52 ± 5 and 58 ± 5 kJ·mol-1, respectively. A half-order dependence of the reaction rate on hydrogen pressure was observed, suggesting that the rate-determining step was the reaction of the adsorbed formate with reversibly adsorbed hydrogen atom. The reaction of HCOO(a) with D2 was 2.1 ± 0.3 times faster than that of DCOO(a) with H2 at 300 K, and the origin of the isotope effect is discussed.

AB - Kinetics of the CH/CD isotope exchange reaction of formate (HCOO(a)/DCOO(a)) on Ni(110) with gaseous D2/H2 was investigated below the decomposition temperature (360 K) by infrared reflection absorption spectroscopy (IRAS). The apparent activation energies of HCOO(a) → DCOO (a) and DCOO(a) → HCOO-(a) reactions were derived as 52 ± 5 and 58 ± 5 kJ·mol-1, respectively. A half-order dependence of the reaction rate on hydrogen pressure was observed, suggesting that the rate-determining step was the reaction of the adsorbed formate with reversibly adsorbed hydrogen atom. The reaction of HCOO(a) with D2 was 2.1 ± 0.3 times faster than that of DCOO(a) with H2 at 300 K, and the origin of the isotope effect is discussed.

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JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

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ER -

Isotope exchange reaction of formate with molecular hydrogen on Ni(110) by IRAS

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