Protonation of O2 adsorbed on a Pt3 island supported on transition metal surfaces. Academic Article

abstract

• The reduction in oxygen on bimetallic tips X(S)Pt(3) (X(S) = Co(3), Ni(3), Pt(6), Co(3)Pt(3)) in aqueous acid medium is studied. It is found that a locally neutral neighborhood of an active site in the bimetallic tip as well as adduct hydration assist in the protonation. It is concluded that metallic tips of Pt, Co(3)Pt, and Co are comparable in performance for the oxygen reduction reaction. For an adduct, the larger the bonding energy of the Pt(3)-island to the (X(S)) substrate, the more charged the oxygen molecule becomes for different levels of protonation. Furthermore, if a hydroxyl OOH group is formed as a result of protonation, the interaction of the cation with O(2) decreases with increasing level of hydration.

authors

• Seminario, Jorge

published proceedings

• J Chem Phys

author list (cited authors)

• Sotelo, J. C., & Seminario, J. M.

citation count

• 2

complete list of authors

• Sotelo, Juan C||Seminario, Jorge M

publication date

• July 2009

publisher

• AIP Publishing  Publisher

published in

• Journal of Chemical Physics  Journal

keywords

• Adsorbed Layers
• Association
• Cobalt Alloys
• Nickel Alloys
• Oxygen
• Platinum
• Platinum Alloys
• Reduction (chemical)
• Solvation
• Surface Chemistry

PubMed Central ID

• 19655911

Digital Object Identifier (DOI)

• 10.1063/1.3179690

start page

• 044709

end page

• 044709

volume

• 131

issue

• 4

URL

• http://dx.doi.org/10.1063/1.3179690