Interaction of acetylene with the Pd(110)(1 × 2)-Cs surface: promotion of ethylene formation

T. Takaoka; T. Sekitani; T. Aruga; M. Nishijima

doi:10.1016/0039-6028(94)91196-7

Interaction of acetylene with the Pd(110)(1 × 2)-Cs surface: promotion of ethylene formation

T. Takaoka, T. Sekitani, T. Aruga, M. Nishijima

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

6 Citations (Scopus)

Abstract

The interaction of acetylene with the Pd(110)(1 × 2)-Cs surface has been studied by the use of high-resolution electron energy loss spectroscopy and thermal desorption spectroscopy. For a small exposure (0.2 L) at 90 K, acetylene is chemisorbed. For a large exposure (2.5 L), physisorbed acetylene and vinylidene (CCH₂) are formed in addition to chemisorbed acetylene. By heating to 135 K, physisorbed acetylene desorbs from the surface. By heating to 260 K, acetylene is converted to vinylidene. Ethylene desorption takes place at 315 K. After heating to 400 K, methylidyne and carbon are formed on the surface. Compared with the case for Pd(110)(1 × 1), ethylene formation is markedly promoted on the Pd(110)(1 × 2)-Cs surface. The effects of the Cs modification are discussed. It is shown that the acetylene hydrogenation occurs via vinylidene.

Original language	English
Pages (from-to)	179-192
Number of pages	14
Journal	Surface Science
Volume	306
Issue number	1-2
DOIs	https://doi.org/10.1016/0039-6028(94)91196-7
Publication status	Published - 1994 Apr 1
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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title = "Interaction of acetylene with the Pd(110)(1 × 2)-Cs surface: promotion of ethylene formation",

abstract = "The interaction of acetylene with the Pd(110)(1 × 2)-Cs surface has been studied by the use of high-resolution electron energy loss spectroscopy and thermal desorption spectroscopy. For a small exposure (0.2 L) at 90 K, acetylene is chemisorbed. For a large exposure (2.5 L), physisorbed acetylene and vinylidene (CCH2) are formed in addition to chemisorbed acetylene. By heating to 135 K, physisorbed acetylene desorbs from the surface. By heating to 260 K, acetylene is converted to vinylidene. Ethylene desorption takes place at 315 K. After heating to 400 K, methylidyne and carbon are formed on the surface. Compared with the case for Pd(110)(1 × 1), ethylene formation is markedly promoted on the Pd(110)(1 × 2)-Cs surface. The effects of the Cs modification are discussed. It is shown that the acetylene hydrogenation occurs via vinylidene.",

author = "T. Takaoka and T. Sekitani and T. Aruga and M. Nishijima",

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T1 - Interaction of acetylene with the Pd(110)(1 × 2)-Cs surface

T2 - promotion of ethylene formation

AU - Takaoka, T.

AU - Sekitani, T.

AU - Aruga, T.

AU - Nishijima, M.

PY - 1994/4/1

Y1 - 1994/4/1

N2 - The interaction of acetylene with the Pd(110)(1 × 2)-Cs surface has been studied by the use of high-resolution electron energy loss spectroscopy and thermal desorption spectroscopy. For a small exposure (0.2 L) at 90 K, acetylene is chemisorbed. For a large exposure (2.5 L), physisorbed acetylene and vinylidene (CCH2) are formed in addition to chemisorbed acetylene. By heating to 135 K, physisorbed acetylene desorbs from the surface. By heating to 260 K, acetylene is converted to vinylidene. Ethylene desorption takes place at 315 K. After heating to 400 K, methylidyne and carbon are formed on the surface. Compared with the case for Pd(110)(1 × 1), ethylene formation is markedly promoted on the Pd(110)(1 × 2)-Cs surface. The effects of the Cs modification are discussed. It is shown that the acetylene hydrogenation occurs via vinylidene.

AB - The interaction of acetylene with the Pd(110)(1 × 2)-Cs surface has been studied by the use of high-resolution electron energy loss spectroscopy and thermal desorption spectroscopy. For a small exposure (0.2 L) at 90 K, acetylene is chemisorbed. For a large exposure (2.5 L), physisorbed acetylene and vinylidene (CCH2) are formed in addition to chemisorbed acetylene. By heating to 135 K, physisorbed acetylene desorbs from the surface. By heating to 260 K, acetylene is converted to vinylidene. Ethylene desorption takes place at 315 K. After heating to 400 K, methylidyne and carbon are formed on the surface. Compared with the case for Pd(110)(1 × 1), ethylene formation is markedly promoted on the Pd(110)(1 × 2)-Cs surface. The effects of the Cs modification are discussed. It is shown that the acetylene hydrogenation occurs via vinylidene.

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