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<p>Ce and polyvinyl pyrrolidone (PVP) were used as dopants to construct Ce, PVP-codoped Ti/SnO<sub>2</sub>-Sb/PbO<sub>2</sub> electrode in methanesulfonic acid (MSA) bath for the electrocatalytic removal of organics. The Ce, PVP-codoping results in the formation of more compact PbO2 film and the smaller crystalline size compared with the respective incorporation of Ce or PVP. The accelerated lifetime of the codoped electrode reaches more than 250&#xa0;h, longer than 223&#xa0;h of Ce-doped electrode. The removal efficacy of methyl orange (MO) on the codoped electrode reaches 99.34% after 3&#xa0;h of electrolysis at the current density of 20&#xa0;mA/cm<sup>2</sup>, and the pseudo-first order apparent rate constant is measured to be 2.219 × 10<sup>− 2</sup> min<sup>− 1</sup>, higher than those in the cases of the respective incorporation of Ce or PVP. The increases of both the specific surface area and the ratio of adsorbed oxygen to lattice oxygen are responsible for the improvement of electrocatalytic activity of the codoped electrode. The removal efficacy of methyl orange (MO) on the Ti/SnO<sub>2</sub>-Sb/Ce-PVP-PbO<sub>2</sub> anode depends on the applied current density and pH. The hydroxyl radicals, existing in the form of PbO<sub><i>x</i></sub>(•OH), make main contribution to the removal of MO compared to the direct electrooxidation.</p> Graphical Abstract <p></p>

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Preparation of Ce, PVP-codoped Ti/SnO2-Sb/PbO2 Electrode and its Application in Removal of Methyl Orange

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • Tingzhu Chen,
  • Shuna Liu,
  • Feng Zhou,
  • Yongming Tang

摘要

Ce and polyvinyl pyrrolidone (PVP) were used as dopants to construct Ce, PVP-codoped Ti/SnO2-Sb/PbO2 electrode in methanesulfonic acid (MSA) bath for the electrocatalytic removal of organics. The Ce, PVP-codoping results in the formation of more compact PbO2 film and the smaller crystalline size compared with the respective incorporation of Ce or PVP. The accelerated lifetime of the codoped electrode reaches more than 250 h, longer than 223 h of Ce-doped electrode. The removal efficacy of methyl orange (MO) on the codoped electrode reaches 99.34% after 3 h of electrolysis at the current density of 20 mA/cm2, and the pseudo-first order apparent rate constant is measured to be 2.219 × 10− 2 min− 1, higher than those in the cases of the respective incorporation of Ce or PVP. The increases of both the specific surface area and the ratio of adsorbed oxygen to lattice oxygen are responsible for the improvement of electrocatalytic activity of the codoped electrode. The removal efficacy of methyl orange (MO) on the Ti/SnO2-Sb/Ce-PVP-PbO2 anode depends on the applied current density and pH. The hydroxyl radicals, existing in the form of PbOx(•OH), make main contribution to the removal of MO compared to the direct electrooxidation.

Graphical Abstract