Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: Fritz-Haber-Institut     Collection: Physical Chemistry     Display Documents



ID: 43734.0, Fritz-Haber-Institut / Physical Chemistry
An EQCM study of the electrochemical copper(II)/copper(I)/copper system in the presence of PEG and chloride ions
Authors:Doblhofer, Karl; Wasle, Sabine; Soares, David M.; Weil, Konrad G.; Ertl, Gerhard
Language:English
Date of Publication (YYYY-MM-DD):2003-08-14
Title of Journal:Journal of the Electrochemical Society
Journal Abbrev.:J. Electrochem. Soc.
Volume:150
Issue / Number:10
Start Page:C657
End Page:C664
Copyright:© 2003 The Electrochemical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The charge-transfer reaction between copper(II) and copper electrodes is studied in electrolytes that are similar to galvanic copper baths, 2.2 M H2SO4 + 0.3 M CuSO4 + chloride ions (cCl < 1 x 10–2 M), and polyethyleneglycol 1500 (PEG, cPEG < 4 x 10–3 M). Electrochemical quartz crystal microbalance (EQCM) measurements are conducted, mainly under conditions of cyclic voltammetry. The formation and dissolution of CuCl on the electrode surface at cCl < 2 mM is demonstrated, a notable shift of the pseudo-equilibrium potential associated with CuCl deposition is analyzed, and the inhibition of the charge-transfer reaction by the PEG/Cl– surface layer is characterized. It is shown that the inhibiting layer forms by reaction between the adsorbate-covered copper electrode and PEG, i.e., neither Cu+ nor Cu++ from the electrolyte are required. Numerical simulations of the processes as well as parallel experiments conducted with electrolytes not containing Cu(II) support the proposed mechanisms, in particular the role of the intermediate Cu+.
Classification / Thesaurus:PACS: 82.45.-h, 82.80.Fk, 82.30.Fi
External Publication Status:published
Document Type:Article
Communicated by:Gerhard Ertl
Affiliations:Fritz-Haber-Institut/Physical Chemistry
External Affiliations:Soares DM, Univ Estadual Campinas, Phys Inst Gleb Wataghin, CxP 6165, BR-13083970 Campinas, SP, Brazil;
Weil KG, Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
Identifiers:URL:http://ojps.aip.org/getpdf/servlet/GetPDFServlet?f...
DOI:10.1149/1.1602083
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.