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Mechanism of Electrodeposition of PbO 2 at a Pt Sheet/Rotating Disk Electrode
Author(s) -
Hwang B. J.,
Santhanam R.,
Chang Y. W.
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200203)14:5<363::aid-elan363>3.0.co;2-1
Subject(s) - cyclic voltammetry , electrode , aqueous solution , adsorption , rotating disk electrode , electrochemistry , voltammetry , chemistry , inorganic chemistry , materials science , chemical engineering , engineering
The electrodeposition of PbO 2 from aqueous solutions of Pb(II) species at Pt sheet and Pt rotating disk electrodes was carried out using cyclic voltammetry. Experimental results have shown that the electrodeposition of PbO 2 has several steps. The first step is the hydration of Pb(II) species in the bulk solution. At the next step, these hydrated species adsorb on the electrode surface. At the third step the adsorbed species is oxidized electrochemically to form an intermediate product, Pb(OH) $\rm{_{2(\rm ad)}^+}$ , which is further oxidized electrochemically to form another intermediate product, Pb(OOH) $\rm{_{\rm ad}^+}$ . At the final step, this product dehydrates to form PbO 2 .