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首页> 外文期刊>RSC Advances >Electrocatalytic performance of Pt-Ni nanoparticles supported on an activated graphite electrode for ethanol and 2-propanol oxidation
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Electrocatalytic performance of Pt-Ni nanoparticles supported on an activated graphite electrode for ethanol and 2-propanol oxidation

机译：用于乙醇和2-丙醇氧化的活性石墨电极上负载Pt-Ni纳米颗粒的电催化性能

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摘要

Platinum (Pt) and platinum-nickel (Pt-Ni) electrocatalysts were prepared on activated graphite electrodes by an electrochemical deposition process. The electrocatalysts were analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The electrocatalytic activity of the prepared electrocatalysts, their stability, and the effect of temperature toward ethanol and 2-propanol oxidation were evaluated by cyclic voltammetry (CV), chronoamperometry and electrochemical impedance spectroscopy (EIS). The results showed that the Pt-Ni/C exhibited higher catalytic activity, better stability and better tolerance to poisoning by ethanol and 2-propanol oxidation intermediate species compared to Pt/C, which was interpreted as synergistic and electronic effects between Pt and Ni. A study of the temperature dependence of ethanol and 2-propanol oxidation in the temperature range of 298-318 K, shows that the apparent activation energy for ethanol and 2-propanol oxidation on Pt-Ni/C was lower than on Pt/C. The results also revealed that the electro-oxidation of ethanol and 2-propanol on Pt/C were improved by raising the temperature and Ni modification.
机译：通过电化学沉积工艺在活性石墨电极上制备铂（Pt）和铂 - 镍（Pt-Ni）电催化剂。通过扫描电子显微镜（SEM），能量分散X射线光谱（EDX）和X射线衍射（XRD）分析电催化剂。通过循环伏安法（CV），计时率和电化学阻抗光谱（EIS）评价制备的电催化剂，其稳定性和温度升温氧化乙醇和2-丙醇氧化的电催化活性。结果表明，与Pt / c相比，Pt-Ni / C表现出更高的催化活性，更好的稳定性和对中毒的耐药性更好，并将其被解释为Pt和Ni之间的协同和电子效应。对298-318K温度范围内乙醇和2-丙醇氧化的温度依赖性的研究表明，PT-Ni / C上的乙醇和2-丙醇氧化的表观活化能量低于Pt / c。结果还通过提高温度和Ni改性，改善了乙醇和2-丙醇对Pt / C的电氧化。

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  • 来源
    《RSC Advances》 |2020年第61期|共8页
  • 作者

    Chelaghmia M. L.; Nacef M.; Fisli H.; Affoune A. M.; Pontie M.; Makhlouf A.; Derabla T.; Khelifi O.; Aissat F.;

  • 作者单位

    Univ 8 Mai 1945 Guelma Dept Genie Proc Lab Anal Ind &

    Genie Mat BP 401 Guelma 24000 Algeria;

    Univ 8 Mai 1945 Guelma Dept Genie Proc Lab Anal Ind &

    Genie Mat BP 401 Guelma 24000 Algeria;

    Univ 8 Mai 1945 Guelma Dept Sci Mat Lab Chim Appl BP 401 Guelma 24000 Algeria;

    Univ 8 Mai 1945 Guelma Dept Genie Proc Lab Anal Ind &

    Genie Mat BP 401 Guelma 24000 Algeria;

    Univ Angers Fac Sci Grp Anal &

    Proc GAP 2 Bd Lavoisier F-49045 Angers 01 France;

    Univ 8 Mai 1945 Lab Silicates Polymeres &

    Nanocomposites Guelma Algeria;

    Univ 8 Mai 1945 Guelma Dept Genie Proc Lab Anal Ind &

    Genie Mat BP 401 Guelma 24000 Algeria;

    Univ 8 Mai 1945 Guelma Dept Genie Proc Lab Anal Ind &

    Genie Mat BP 401 Guelma 24000 Algeria;

    Ctr Rech Sci &

    Tech Anal Physicochim CRAPC Bou Ismail Algeria;

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  • 正文语种 eng
  • 中图分类 化学;
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