Spectroscopic evidence for the formation of CHx species in the hydrogenation of carbidic carbon on Ni(100)

Hong He; Junji Nakamura; Ken ichi Tanaka

doi:10.1007/BF00764898

Spectroscopic evidence for the formation of CH_x species in the hydrogenation of carbidic carbon on Ni(100)

Hong He
, Junji Nakamura
, Ken ichi Tanaka

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

11 Citations (Scopus)

Abstract

The CH_x species formed on Ni(100) by hydrogenation of carbidic carbon have been detected using high resolution electron energy-loss spectroscopy (HREELS). Exposures of carbidic carbon to 1×10^-7 Torr H₂ and D₂ at 313 K for 20 min produce CH_x and CD_x species, respectively. These species are identified by two energy-loss peaks for CH_x at 2970 and 1380 cm^-1 and only one peak for CD_x at 1980 cm^-1. Because of the existence of the intense peak at 1380 cm^-1, in the range of a scissors mode for CH₂ and a symmetric deformation mode for CH₃, the CH_x species are tentatively ascribed to CH₂ and/or CH₃. The CD_x species undergo decomposition at 330-370 K in UHV as well as in hydrogen below 10^-7 Torr. No stable CH_x species are observed above 400 K, which is lower than the normal reaction temperature of the methanation reaction (500 K).

Original language	English
Pages (from-to)	407-412
Number of pages	6
Journal	Catalysis Letters
Volume	16
Issue number	4
DOIs	https://doi.org/10.1007/BF00764898
Publication status	Published - Dec 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

Catalysis
General Chemistry

Access to Document

10.1007/BF00764898

Cite this

@article{7a04be00afc14c4d80d834882228f63f,

title = "Spectroscopic evidence for the formation of CHx species in the hydrogenation of carbidic carbon on Ni(100)",

abstract = "The CHx species formed on Ni(100) by hydrogenation of carbidic carbon have been detected using high resolution electron energy-loss spectroscopy (HREELS). Exposures of carbidic carbon to 1×10-7 Torr H2 and D2 at 313 K for 20 min produce CHx and CDx species, respectively. These species are identified by two energy-loss peaks for CHx at 2970 and 1380 cm-1 and only one peak for CDx at 1980 cm-1. Because of the existence of the intense peak at 1380 cm-1, in the range of a scissors mode for CH2 and a symmetric deformation mode for CH3, the CHx species are tentatively ascribed to CH2 and/or CH3. The CDx species undergo decomposition at 330-370 K in UHV as well as in hydrogen below 10-7 Torr. No stable CHx species are observed above 400 K, which is lower than the normal reaction temperature of the methanation reaction (500 K).",

author = "Hong He and Junji Nakamura and Tanaka, \{Ken ichi\}",

year = "1992",

month = dec,

doi = "10.1007/BF00764898",

language = "English",

volume = "16",

pages = "407--412",

journal = "Catalysis Letters",

issn = "1011-372X",

publisher = "Kluwer Academic Publishers",

number = "4",

}

TY - JOUR

T1 - Spectroscopic evidence for the formation of CHx species in the hydrogenation of carbidic carbon on Ni(100)

AU - He, Hong

AU - Nakamura, Junji

AU - Tanaka, Ken ichi

PY - 1992/12

Y1 - 1992/12

N2 - The CHx species formed on Ni(100) by hydrogenation of carbidic carbon have been detected using high resolution electron energy-loss spectroscopy (HREELS). Exposures of carbidic carbon to 1×10-7 Torr H2 and D2 at 313 K for 20 min produce CHx and CDx species, respectively. These species are identified by two energy-loss peaks for CHx at 2970 and 1380 cm-1 and only one peak for CDx at 1980 cm-1. Because of the existence of the intense peak at 1380 cm-1, in the range of a scissors mode for CH2 and a symmetric deformation mode for CH3, the CHx species are tentatively ascribed to CH2 and/or CH3. The CDx species undergo decomposition at 330-370 K in UHV as well as in hydrogen below 10-7 Torr. No stable CHx species are observed above 400 K, which is lower than the normal reaction temperature of the methanation reaction (500 K).

AB - The CHx species formed on Ni(100) by hydrogenation of carbidic carbon have been detected using high resolution electron energy-loss spectroscopy (HREELS). Exposures of carbidic carbon to 1×10-7 Torr H2 and D2 at 313 K for 20 min produce CHx and CDx species, respectively. These species are identified by two energy-loss peaks for CHx at 2970 and 1380 cm-1 and only one peak for CDx at 1980 cm-1. Because of the existence of the intense peak at 1380 cm-1, in the range of a scissors mode for CH2 and a symmetric deformation mode for CH3, the CHx species are tentatively ascribed to CH2 and/or CH3. The CDx species undergo decomposition at 330-370 K in UHV as well as in hydrogen below 10-7 Torr. No stable CHx species are observed above 400 K, which is lower than the normal reaction temperature of the methanation reaction (500 K).

UR - https://www.scopus.com/pages/publications/0344299584

UR - https://www.scopus.com/pages/publications/0344299584#tab=citedBy

U2 - 10.1007/BF00764898

DO - 10.1007/BF00764898

M3 - Article

AN - SCOPUS:0344299584

SN - 1011-372X

VL - 16

SP - 407

EP - 412

JO - Catalysis Letters

JF - Catalysis Letters

IS - 4

ER -

Spectroscopic evidence for the formation of CH_x species in the hydrogenation of carbidic carbon on Ni(100)

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this