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Elsevier, Journal of Electroanalytical Chemistry, 1(663), p. 48-51, 2011

DOI: 10.1016/j.jelechem.2011.09.025

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Cyclic-voltammetry characteristics of poly(vinyl pyrrolidone) (PVP) on single-crystal Pt surfaces in aqueous H2SO4

Journal article published in 2011 by Luiz H. S. Gasparotto, Janaina F. Gomes ORCID, Germano Tremiliosi-Filho
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

In the present paper we investigated the electrochemical behavior of PVP on polycrystalline and single-crystal Pt electrodes. PVP hampered the characteristic hydrogen UPD and anion adsorption on all investigated surfaces. Several oxidation processes appeared in the anodic sweep with Pt(111) and Pt(100) being the most active for the oxidation processes. Repetitive cycling of the PVPads-modified Pt(111) or Pt(100) electrodes in PVP-free aqueous H2SO4 solution leads to a continuous suppression of the characteristic hydrogen UPD and anion adsorption as a consequence of PVP oxidation. However no PVP oxidation was observed when cycling the PVPads-modified Pt(110) electrode in PVP-free aqueous H2SO4 solution.