CO Adsorption on Clean and Oxidized Pd(111)

• The adsorption of CO on clean and oxidized Pd(111) surfaces has been investigated using a combination of high-resolution core level spectroscopy (HRCLS), reflection absorption infrared spectroscopy (RAIRS), and density functional theory (DFT) calculations. The HRCLS and RAIRS measurements reveal that CO adsorbs on Pd(111), Pd(5)O4 and PdO(101) at 100 +/- 10 K and that the CO coverage decreases with increasing oxidation state of Pd for the same CO exposures of 10 Langmuirs. Based on the DFT calculations, the CO layer on clean Pd(111) was found to include molecular adsorption in both hollow and bridge sites, whereas CO occupies a combination of bridge and atop sites on the Pd5O4 and PdO(101) surfaces.

Subject headings

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

Keyword

AUGMENTED-WAVE METHOD

REFLECTION-ABSORPTION SPECTROSCOPY

CARBON-MONOXIDE

PDO(101) THIN-FILM

PHOTOEMISSION

LEVEL

TOTAL-ENERGY CALCULATIONS

ULTRAHIGH-VACUUM

ORDERED STRUCTURES

CATALYTIC REACTIVITY

VIBRATIONAL SPECTROSCOPY

Publication and Content Type

art (subject category)

ref (subject category)