TY - JOUR
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.
N1 - Funding Information:
This work was supportedi n part by a Grant-in-Aid for Scientific Researchf rom the Ministry of Education, Sciencea nd Culture of Japan, and by a Grant-in-Aid from the Nippon Sheet Glass Foundationf or Materials Science.
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.
UR - http://www.scopus.com/inward/record.url?scp=0028413027&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028413027&partnerID=8YFLogxK
U2 - 10.1016/0039-6028(94)91196-7
DO - 10.1016/0039-6028(94)91196-7
M3 - Article
AN - SCOPUS:0028413027
VL - 306
SP - 179
EP - 192
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 1-2
ER -