<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0872-1904</journal-id>
<journal-title><![CDATA[Portugaliae Electrochimica Acta]]></journal-title>
<abbrev-journal-title><![CDATA[Port. Electrochim. Acta]]></abbrev-journal-title>
<issn>0872-1904</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Electroquímica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0872-19042024000400273</article-id>
<article-id pub-id-type="doi">10.4152/pea.2024420403</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[On the Dissolution of a Copper Electrode with the Production of Copper (II) Oxide During Alternating Current Polarization in a Sulfate Electrolyte]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bayeshova]]></surname>
<given-names><![CDATA[&#1040;zhar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bayeshov]]></surname>
<given-names><![CDATA[&#1040;bduali]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zhumabay]]></surname>
<given-names><![CDATA[Fatima]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Al-Farabi Kazakh National University Center of Physicochemical Methods of Research and Analysis ]]></institution>
<addr-line><![CDATA[Almaty ]]></addr-line>
<country>Kazakhstan</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,JSC D. V. Sokolsky Institute of Fuel, Catalysis and Electrochemistry  ]]></institution>
<addr-line><![CDATA[Almaty ]]></addr-line>
<country>Kazakhstan</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Al-Farabi Kazakh National University Center of Physicochemical Methods of Research and Analysis ]]></institution>
<addr-line><![CDATA[Almaty ]]></addr-line>
<country>Kazakhstan</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2024</year>
</pub-date>
<volume>42</volume>
<numero>4</numero>
<fpage>273</fpage>
<lpage>283</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-19042024000400273&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-19042024000400273&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-19042024000400273&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The present study demonstrated that, when a Cu-Ti electrode pair was polarized in an aqueous SO4 2- electrolyte, Cu was oxidized to a divalent state, under AC. In the solution volume, Cu2+ interacted with OH¯, to produce Cu(OH)2. Depending on the electrolysis conditions, Cu(OH)2 underwent a dehydration reaction, which produced CuO. Under industrial AC, each electrode was alternately polarized, firstly towards the anode, then to the cathode. CuE passivation did not occur. With a change in j on TiE, in the range from 0 to 75 kA/m2, CuE dissolution CE increased, reaching 96.5%. When j on CuE was increased to 1000 A/m2, Cu dissolution CE was above 90%. The most favourable conditions for CuE dissolution were a Na2SO4 Ct from 65 to 75 g/L, experiment duration of 1 h, room T, and I frequency of 50 Hz. The obtained CuO (II) composition was identified by XRD and EDXRF analyses.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[AC]]></kwd>
<kwd lng="en"><![CDATA[Cu]]></kwd>
<kwd lng="en"><![CDATA[CV]]></kwd>
<kwd lng="en"><![CDATA[dissolution]]></kwd>
<kwd lng="en"><![CDATA[electrolysis]]></kwd>
<kwd lng="en"><![CDATA[Ti]]></kwd>
</kwd-group>
</article-meta>
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