Stability of carbon monoxide adsorbed on nanoparticle Pt and Pt/Ru electrodes in sulfuric acid media

Pt and Pt/Ru nanoparticle electrodes were used as substrates for studies of stability of chemisorbed CO and its interactions (exchange) with carbon monoxide and hydrogen gas admitted to sulfuric acid solution, which served as the supporting electrolyte for these measurements. The surface bound, radi...

Full description

Saved in:
Bibliographic Details
Published in:Electrochimica acta 2006-01, Vol.51 (7), p.1194-1198
Main Authors: McGovern, M.S., Waszczuk, P., Wieckowski, A.
Format: Article
Language:English
Subjects:
Adsorption
Catalysis
Chemistry
CO adsorption
CO exchange
Electrochemistry
Exact sciences and technology
Fuel cell
General and physical chemistry
Nanoparticles
PEM
Pt electrode
Pt/Ru electrode
Radioactive labeling
Study of interfaces
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Pt and Pt/Ru nanoparticle electrodes were used as substrates for studies of stability of chemisorbed CO and its interactions (exchange) with carbon monoxide and hydrogen gas admitted to sulfuric acid solution, which served as the supporting electrolyte for these measurements. The surface bound, radioactive CO was obtained after decomposition of 14C labeled methanol or formic acid from the same solution. The stability and/or exchange of the surface bound CO was examined after (i) the 14C CO containing electrolyte was replaced by the clean supporting electrolyte (to remove the CO solute from the bulk) and (ii) after hydrogen and, separately, non-radioactive CO was admitted to the cell. We found no displacement of adsorbed CO due to the exchange of electrolyte or introduction of hydrogen to the cell. However, non-radioactive CO rapidly displaced the adsorbed 14C CO on the surface leaving behind a monolayer of chemisorbed but non-radioactive CO. Both results were independent of the electrode potential applied and they neither dependent on the source of surface CO, that is, whether it was deposited from methanol or formic acid solutions.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2005.06.010