Graphical abstract<'/> Electrocatalytic behavior of a nanocomposite of Ni/Pd supported by carbonized PVA nanofibers towards formic acid, ethanol and urea oxidation: A physicochemical and electro-analysis study
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Electrocatalytic behavior of a nanocomposite of Ni/Pd supported by carbonized PVA nanofibers towards formic acid, ethanol and urea oxidation: A physicochemical and electro-analysis study

机译：碳化PVA纳米纤维负载的Ni / Pd纳米复合材料对甲酸，乙醇和尿素氧化的电催化行为：物理化学和电分析研究

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Graphical abstractDisplay OmittedHighlights•Ni&Pd@C-nanofibers are synthesized via facile two steps; electrospinning followed by carbonization.•The produced NFs have FCC-crystals with crystal size and d-spacing 18.08 and 0.211 nm, respectively.•Enhancement on the produced current was observed as increase of formic acid concentration up to 3 mol/l.•Cyclic voltammetry studies confirm the electrocatalytic performance of the synthesized-NFs towards ethanol and urea in alkaline medium.AbstractA nanocomposite of Ni/Pd supported by carbonized poly-vinyl alcohol (PVA) nanofibers (NFs) was synthesized via electrospinning followed by calcination under an argon atmosphere. The as-synthesized NFs were studied using physicochemical analyses, such as field-emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS), to investigate the morphology, crystallinity, effect of carbonization and surface chemistry of the NFs, respectively. Cyclic voltammetry (CV) and chronoamperometry (CA) were utilized to study the performance of the NFs towards electrooxidation reactions. The designed NFs present superior electrocatalytic behavior in an acid medium towards formic acid oxidation, as well as urea and ethanol oxidation in an alkaline medium. The electrocatalytic performance of the bimetallic NFs appears to arise from the assembly of bimetallic Ni/Pd@NFs based on PVA, which has hydroxyl groups. These hydroxyl groups can decrease the negative processes that occur as a result of metal-metal interactions, such as the aggregation process. This study introduces a novel non-precious electrocatalyst to facilitate the commercialization of fuel cells based on formic acid, urea and ethanol.
机译： 图形摘要 < ce：simple-para>省略显示 突出显示 • Ni＆Pd @ C-纳米纤维通过两个简单的步骤合成。 • 生成的NF具有FCC晶体，晶体尺寸和d间距分别为18.08和0.211 nm。 • 观察到随着甲酸浓度增加到3 mol /，产生的电流得到增强。 l。 • 循环伏安法研究证实了合成的NFs在碱性介质中对乙醇和尿素的电催化性能。 摘要 由碳化聚乙烯醇（PVA）纳米纤维（NFs）支撑的Ni / Pd纳米复合材料通过静电纺丝，然后在氩气气氛下煅烧来合成1）。使用诸如场发射扫描电子显微镜（FESEM），透射电子显微镜（TEM），X射线衍射（XRD），傅里叶变换红外光谱（FTIR）和X射线光电子等理化分析研究了合成后的NFs光谱仪（XPS），分别研究NFs的形态，结晶度，碳化作用和表面化学。循环伏安法（CV）和计时电流法（CA）用于研究NFs对电氧化反应的性能。设计的NF在酸性介质中对甲酸氧化具有出色的电催化性能，在碱性介质中具有尿素和乙醇的氧化性能。双金属NFs的电催化性能似乎是基于具有羟基的PVA双金属Ni / Pd @ NFs的组装而产生的。这些羟基可以减少由于金属-金属相互作用而发生的负过程，例如聚集过程。这项研究引入了一种新型的非贵金属电催化剂，以促进基于甲酸，尿素和乙醇的燃料电池的商业化。

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  • 来源
    《Applied Surface Science》 |2018年第30期|122-129|共8页
  • 作者

    Ibrahim M.A. Mohamed; Ahmed S. Yasin; Nasser A.M. Barakat; Seung A. Song; Ha Eun Lee; Seong Su Kim;

  • 作者单位

    Department of Mechanical Engineering, KAIST,Department of Chemistry, Faculty of Science, Sohag University;

    Bionanosystem Engineering Department, Chonbuk National University;

    Department of Organic Materials and Fiber Engineering, Chonbuk National University,Chemical Engineering Department, Faculty of Engineering, Minia University;

    Department of Organic Materials and Fiber Engineering, Chonbuk National University;

    Department of Organic Materials and Fiber Engineering, Chonbuk National University;

    Department of Mechanical Engineering, KAIST;

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  • 关键词

    Electrocatalysis; Ni/Pd; PVA; Nanofibers; Formic acid;

    机译：电催化;Ni / Pd;PVA;纳米纤维;甲酸;

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