Chemical environment effects on the atomic oxygen absorption into pt(111) subsurfaces Academic Article

abstract

• Density functional theory is used to study chemical environment effects such as surface coverage of oxygenated species and presence of adsorbed oxygen reduction intermediate OH and water on the atomic oxygen absorption process into Pt(111) subsurfaces. The results show that increasing the on-surface oxygen coverage can energetically and kinetically stabilize subsurface atomic oxygen present at 0.11 and 0.25 monolayer subsurface coverage. At constant subsurface coverage, the absorption energy barrier increases with increasing on-surface coverage. Adsorbed on-surface OH has similar effects on the atomic oxygen absorption process as those caused by on-surface adsorbed atomic oxygen. A monolayer of water over the on-surface oxygen does not significantly alter the thermodynamics and kinetics of the oxygen absorption process. 2007 American Chemical Society.

authors

• Balbuena, Perla

published proceedings

• JOURNAL OF PHYSICAL CHEMISTRY C

author list (cited authors)

• Gu, Z., & Balbuena, P. B.

citation count

• 48

complete list of authors

• Gu, Zhihui||Balbuena, Perla B

publication date

• November 2007

publisher

• American Chemical Society (ACS)  Publisher

published in

• Journal of Physical Chemistry C  Journal

keywords

• 40 Engineering
• 4018 Nanotechnology

Digital Object Identifier (DOI)

• 10.1021/jp074948s

start page

• 17388

end page

• 17396

volume

• 111

issue

• 46

URL

• http://dx.doi.org/10.1021/jp074948s