Carbon monoxide adsorption on Pd-deposited Cu(1 1 0) surface: Infrared reflection absorption and temperature programmed desorption studies

T. Wadayama, H. Osano, H. Yoshida, S. Oda, N. Todoroki

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We investigated carbon monoxide (CO) adsorption and desorption behaviors on 0.1-nm-, 0.15-nm-, and 0.3-nm-thick-Pd-deposited Cu(1 1 0) surfaces using infrared reflection absorption (IRRAS) and temperature-programmed desorption (TPD) spectroscopic methods. CO was exposed to the 0.1-nm-thick-Pd/Cu(1 1 0) surface at the substrate temperature of 90 K. The IR band attributable to CO bonded to Cu atoms emerged at 2092 cm -1 : the band was located at 2100 cm -1 at saturation coverage, with a shoulder at 2110 cm -1 . In addition to these bands, weak absorptions attributable to the Pd{single bond}CO bonds appeared at 2050 and 1960 cm -1 . With increasing Pd thickness, the Pd related-bands became increasingly prominent. Particularly at the early stage of exposure, the band at 2115 cm -1 became visible. The band at 2117 cm -1 dominated the spectra all through the exposures for the 0.3-nm-thick-Pd surface. The TPD spectra of the surfaces showed two remarkable features at around 220-250 and 320-390 K, ascribable,respectively, to Cu{single bond}CO and Pd{single bond}CO. The desorption peaks shifted to higher temperatures with increasing Pd thickness. Based on the TPD and IRRAS results, we discuss the adsorption-desorption behaviors of CO on the Pd/Cu(1 1 0) surfaces.

Original languageEnglish
Pages (from-to)5380-5384
Number of pages5
JournalApplied Surface Science
Volume254
Issue number17
DOIs
Publication statusPublished - 2008 Jun 30

Keywords

  • Carbon monoxide
  • Copper
  • Cu(1 1 0)
  • Infrared absorption spectroscopy
  • Palladium
  • Thermal desorption spectroscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Carbon monoxide adsorption on Pd-deposited Cu(1 1 0) surface: Infrared reflection absorption and temperature programmed desorption studies'. Together they form a unique fingerprint.

Cite this