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Abstract <p>The PtMoO<sub>3</sub>/carbon nanotube (CNT) catalyst was synthesized and its characteristics were investigated in the electrocatalytic oxidation of ethanol in an alkaline medium. It has been shown that PtMoO<sub>3</sub>/CNTs is superior in activity to the commercial catalysts PtRu/C and Pt/C. Optimization has been performed of the architecture of the membrane-electrode assembly (MEA) of an ethanol–oxygen fuel cell (FC) with an anode based on PtMoO<sub>3</sub>/CNT catalyst, including the selection of the optimal cathode catalyst. The nonplatinum catalyst CNT<sub>N</sub> is active in the oxygen reduction reaction (ORR) in an alkaline environment and significantly outperforms the commercial catalyst 40% Pt/C for tolerance to the toxic effects of alcohol. When studying the influence of content of PtMoO<sub>3</sub>/CNT catalyst as part of the anode active layer (AL), an increase has been established on the characteristics of the MEA maximum power density, expressed in mW/cm<sup>2</sup>, with an increase in platinum loading in the range of 0.2–1.34 mg<sub>Pt</sub>/cm<sup>2</sup>. The obtained results indicate a high degree of accessibility of the active centers of the catalyst in the volume of the AL of the developed architecture. Based on the results of testing the optimized MEA at a temperature of 20°C excess pressure and humidification of the oxidizer, a maximum power density of 14.6 and 11 mW/cm<sup>2</sup> when the cathode operates in oxygen and air environments, respectively, was obtained. The achieved parameters correspond to the best results described in the literature for similar experimental conditions.</p>

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PtMoO3/Carbon Nanotubes Anode Catalyst for Direct Ethanol Fuel Cell with an Alkaline Electrolyte

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • A. V. Kuzov,
  • M. V. Radina,
  • O. V. Korchagin,
  • V. N. Andreev

摘要

Abstract

The PtMoO3/carbon nanotube (CNT) catalyst was synthesized and its characteristics were investigated in the electrocatalytic oxidation of ethanol in an alkaline medium. It has been shown that PtMoO3/CNTs is superior in activity to the commercial catalysts PtRu/C and Pt/C. Optimization has been performed of the architecture of the membrane-electrode assembly (MEA) of an ethanol–oxygen fuel cell (FC) with an anode based on PtMoO3/CNT catalyst, including the selection of the optimal cathode catalyst. The nonplatinum catalyst CNTN is active in the oxygen reduction reaction (ORR) in an alkaline environment and significantly outperforms the commercial catalyst 40% Pt/C for tolerance to the toxic effects of alcohol. When studying the influence of content of PtMoO3/CNT catalyst as part of the anode active layer (AL), an increase has been established on the characteristics of the MEA maximum power density, expressed in mW/cm2, with an increase in platinum loading in the range of 0.2–1.34 mgPt/cm2. The obtained results indicate a high degree of accessibility of the active centers of the catalyst in the volume of the AL of the developed architecture. Based on the results of testing the optimized MEA at a temperature of 20°C excess pressure and humidification of the oxidizer, a maximum power density of 14.6 and 11 mW/cm2 when the cathode operates in oxygen and air environments, respectively, was obtained. The achieved parameters correspond to the best results described in the literature for similar experimental conditions.