In situ observation of the dehydration of formate on Ni(110)

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

doi:10.1021/jp9703418

In situ observation of the dehydration of formate on Ni(110)

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

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

24 Citations (Scopus)

Abstract

The dehydration of formate adsorbed on Ni(110) has been studied by the direct observation of the CO(a) produced on the surface by means of time-resolved infrared reflection absorption spectroscopy (TR-IRAS). By the quantitative analysis of the temperature-programmed desorption and TR-IRAS results, it was found that the dehydration proceeds simultaneously with the dehydrogenation. The primary kinetic isotope effect (k_H/k_D) using HCOO(a) and DCOO(a) was observed not only in the dehydrogenation but also in the dehydration (k_H/k_D = 3.3 at 300 K). This result suggests that the rate-determining step (RDS) is the C-H bond dissociation in both processes. These suggestions let us propose a possible mechanism of the dehydration of formate on Ni(110); the RDS of the dehydration is the C-H bond dissociation which is the same as that of the dehydrogenation, and the produced CO₂(a) is the precursor of the production of CO(a) and O(a).

Original language	English
Pages (from-to)	5177-5181
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	101
Issue number	26
DOIs	https://doi.org/10.1021/jp9703418
Publication status	Published - Jan 1 1997
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "In situ observation of the dehydration of formate on Ni(110)",

abstract = "The dehydration of formate adsorbed on Ni(110) has been studied by the direct observation of the CO(a) produced on the surface by means of time-resolved infrared reflection absorption spectroscopy (TR-IRAS). By the quantitative analysis of the temperature-programmed desorption and TR-IRAS results, it was found that the dehydration proceeds simultaneously with the dehydrogenation. The primary kinetic isotope effect (kH/kD) using HCOO(a) and DCOO(a) was observed not only in the dehydrogenation but also in the dehydration (kH/kD = 3.3 at 300 K). This result suggests that the rate-determining step (RDS) is the C-H bond dissociation in both processes. These suggestions let us propose a possible mechanism of the dehydration of formate on Ni(110); the RDS of the dehydration is the C-H bond dissociation which is the same as that of the dehydrogenation, and the produced CO2(a) is the precursor of the production of CO(a) and O(a).",

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

year = "1997",

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T1 - In situ observation of the dehydration of formate on Ni(110)

AU - Yamakata, Akira

AU - Kubota, Jun

AU - Kondo, Junko N.

AU - Hirose, Chiaki

AU - Domen, Kazunari

AU - Wakabayashi, Fumitaka

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The dehydration of formate adsorbed on Ni(110) has been studied by the direct observation of the CO(a) produced on the surface by means of time-resolved infrared reflection absorption spectroscopy (TR-IRAS). By the quantitative analysis of the temperature-programmed desorption and TR-IRAS results, it was found that the dehydration proceeds simultaneously with the dehydrogenation. The primary kinetic isotope effect (kH/kD) using HCOO(a) and DCOO(a) was observed not only in the dehydrogenation but also in the dehydration (kH/kD = 3.3 at 300 K). This result suggests that the rate-determining step (RDS) is the C-H bond dissociation in both processes. These suggestions let us propose a possible mechanism of the dehydration of formate on Ni(110); the RDS of the dehydration is the C-H bond dissociation which is the same as that of the dehydrogenation, and the produced CO2(a) is the precursor of the production of CO(a) and O(a).

AB - The dehydration of formate adsorbed on Ni(110) has been studied by the direct observation of the CO(a) produced on the surface by means of time-resolved infrared reflection absorption spectroscopy (TR-IRAS). By the quantitative analysis of the temperature-programmed desorption and TR-IRAS results, it was found that the dehydration proceeds simultaneously with the dehydrogenation. The primary kinetic isotope effect (kH/kD) using HCOO(a) and DCOO(a) was observed not only in the dehydrogenation but also in the dehydration (kH/kD = 3.3 at 300 K). This result suggests that the rate-determining step (RDS) is the C-H bond dissociation in both processes. These suggestions let us propose a possible mechanism of the dehydration of formate on Ni(110); the RDS of the dehydration is the C-H bond dissociation which is the same as that of the dehydrogenation, and the produced CO2(a) is the precursor of the production of CO(a) and O(a).

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JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 26

ER -

In situ observation of the dehydration of formate on Ni(110)

Abstract

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