EQCM contributions to the reactions of the nickel oxide electrode

descriptionPublicationkeyboard_double_arrow_right Article 06 Nov 2001Publisher:Royal Society of Chemistry (RSC)Journal:Physical Chemistry Chemical Physics, volume 3, pages 5,290-5,296 (issn: 1463-9076, eissn: 1463-9084,

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Authors: T. Ohligschläger; G. Schwitzgebel;

doi: 10.1039/b105458a

EQCM contributions to the reactions of the nickel oxide electrode

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Abstract

Films of nickel hydroxide (thickness 0.35 μm) were electrochemically deposited on smooth and rough Au electrodes of an electrochemical quartz crystal microbalance. The films consisted of α-Ni(OH)2 (diffractogram) and contained traces of NO3− and CO32− (IR). They were cycled (10 mV s−1) in KOH solutions (1, 0.1, 0.01 M) between 0 and 0.6 V as well as between − 0.3 and 0.6 V s. Hg/HgO iss. Cyclovoltammograms and mass flux curves were used to study the redox processes. As the mass flux peaks of the redox reactions of Bode's scheme (αII⇌γIII/IV and βII⇌βIII) have different signs and different redox potentials (Eα/γ

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