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Effect of Fe state on electrocatalytic activity of Pd-Fe/C catalyst for oxygen reduction

机译：Fe状态对Pd-Fe / C催化剂氧还原电催化活性的影响

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摘要

The carbon-supported Pd-Fe catalyst (Pd-Fe/C) is prepared in the H_2O/tetrahydrofuran (THF) mixture solvent under the low temperature. The homemade Pd-Fe/C catalyst contains two forms of iron species, alloying and non-alloying Fe. The alloying Fe species is hardly dissolved in 0.5 M H_2SO_4 solution, while the non-alloying Fe species is easily dissolved in 0.5 M H_2SO_4 solution. The electrochemical measurements show the electrocatalytic activity of the Pd-Fe/C catalyst with the acid treatment for the oxygen reduction is higher than that of the Pd-Fe/C catalyst without the acid treatment, illustrating that the non-alloying Fe species suppresses the electrocatalytic activity of the Pd-Fe/C catalyst. In contrast, the alloying Fe species promotes the electrocatalytic activity of the Pd-Fe/C catalyst for the oxygen reduction, which is likely attributed to the change of the electron structure of Pd atom and/or bond length of Pd-Pd in the Pd-Fe/C catalyst.
机译：在低温下，在H_2O /四氢呋喃（THF）混合溶剂中制备碳载Pd-Fe催化剂（Pd-Fe / C）。自制的Pd-Fe / C催化剂包含两种形式的铁，合金化和非合金化Fe。合金化的Fe几乎不溶于0.5 M H_2SO_4溶液，而非合金化的Fe则容易溶于0.5 M H_2SO_4溶液。电化学测量结果表明，采用酸处理的Pd-Fe / C催化剂对氧还原的电催化活性高于未经酸处理的Pd-Fe / C催化剂的电催化活性，表明非合金化的Fe物种抑制了金属的氧化。 Pd-Fe / C催化剂的电催化活性。相反，合金化的Fe物种促进Pd-Fe / C催化剂对氧还原的电催化活性，这很可能归因于Pd原子的电子结构和/或Pd-Pd中键长的变化。 -Fe / C催化剂。

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  • 来源
    《Applied Surface Science》 |2010年第13期|p.4196-4200|共5页
  • 作者

    Yawen Tang; Shuang Cao; Yu Chen; Tianhong Lu; Yiming Zhou; Lude Lu; Jianchun Bao;

  • 作者单位

    Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094, PR China College of Chemistry and Environmental Science, Nanjing Normal University, 1# Wenyuan Road, Nanjing 210046, PR China;

    College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, PR China;

    College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, PR China;

    College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, PR China;

    College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, PR China;

    Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094, PR China;

    Key Laboratory for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094, PR China College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pd-Fe nanoparticle; catalyst; alloy; electrocatalytic activity; oxygen reduction;

    机译：钯铁纳米粒子催化剂;合金;电催化活性氧气还原;

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