Adsorption and reaction of acetylene on clean and oxygen-precovered Pd(100) studied with high-resolution X-ray photoelectron spectroscopy

被引：7

作者：

Hoefert, O.

Lorenz, M. P. A.

Streber, R.

Zhao, W.

Bayer, A.

Steinrueck, H. -P.

Papp, C. ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Lehrstuhl Phys Chem 2, D-91058 Erlangen, Germany

来源：

JOURNAL OF CHEMICAL PHYSICS | 2013年 / 139卷 / 16期

关键词：

SINGLE-CRYSTAL SURFACES; VIBRATIONAL SPECTROSCOPY; ETHYLENE; PALLADIUM; PD(111); DECOMPOSITION; CHEMISORPTION; OVERLAYERS; COMBUSTION; ADSORBATES;

D O I：

10.1063/1.4825112

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigated the adsorption and thermal evolution of acetylene on clean Pd(100) and Pd(100) precovered with 0.25 ML oxygen. The measurements were performed in situ by fast XPS at the synchrotron radiation facility BESSY II. On Pd(100) acetylene molecularly adsorbs at 130 K. Upon heating transformation to a CCH species occurs around 390 K along with the formation of a completely dehydrogenated carbon species. On the oxygen-precovered surface partial CCH formation already occurs upon adsorption at 130 K, and the dehydrogenation temperature and the stability range of CCH are shifted to lower temperatures by similar to 200 K. (C) 2013 AIP Publishing LLC.

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页数：7

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