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首页> 外文期刊>New Journal of Chemistry >A nickel ion-incorporating zinc-mesoporous metal organic framework thin film nanocomposite modified glassy carbon electrode for electrocatalytic oxidation of methanol in alkaline media
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A nickel ion-incorporating zinc-mesoporous metal organic framework thin film nanocomposite modified glassy carbon electrode for electrocatalytic oxidation of methanol in alkaline media

机译：一种镍离子掺入锌 - 中孔金属有机骨架薄膜纳米复合材料改性玻璃电极，用于碱性介质的电催化氧化甲醇

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摘要

In this work, we have successfully synthesized zinc-mesoporous metal-organic framework thin films (Zn-mMOFTFs) on the surface of a glassy carbon electrode (GCE) by self-assembly accumulation and electrochemical potentiostatic techniques. Then the electrodeposited Zn-MOFTFs were incorporated with Ni ions through the immersion of the obtained electrode in Ni(ii) solution to form the final modified electrode, Ni/Zn-mMOFTFs/GCE, which was characterized utilizing the various instrumental techniques. In electrochemical studies, the obtained modified electrode, Ni/Zn-mMOFTFs/GCE, showed enhanced electrocatalytic activity toward the oxidation of methanol (CH3OH) in alkaline media. The values of catalytic rate constant (k) and the electron transfer coefficient (alpha) for the electrooxidation of CH3OH on the Ni/Zn-mMOFTFs/GCE were obtained to be 1.43 x 10(4) cm(3) mol(-1) s(-1) and 0.56, respectively. The pseudo steady-state polarization method was employed for further investigation of the electrocatalytic oxidation of CH3OH on the Ni/Zn-mMOFTFs/GCE and the rate constant of the reaction k(2)Gamma = 2.866 x 10(-9) cm s(-1) and the ratio of k0-1/k01 = 2.08 x 10(8) were determined. These results showed that the incorporation of the Ni(ii) ions in the Zn-mMOFTFs produces a significant electrocatalytic activity toward the oxidation of CH3OH and consequently opens a new way to design a high-performance capable electrocatalyst for direct CH3OH fuel cell systems.
机译：在这项工作中，我们通过自组装积累和电化学恒电位技术在玻碳电极（GCE）表面成功地合成了锌介孔金属有机骨架薄膜（Zn-mMOFTFs）。然后，通过将所得电极浸入Ni（ii）溶液中，将电沉积的Zn-MOFTF与Ni离子结合，形成最终修饰电极Ni/Zn-mMOFTFs/GCE，并利用各种仪器技术对其进行表征。在电化学研究中，得到的修饰电极Ni/Zn-mMOFTFs/GCE对甲醇（CH3OH）在碱性介质中的氧化表现出增强的电催化活性。结果表明，在Ni/Zn-mMOFTFs/GCE上，CH3OH电氧化的催化速率常数（k）和电子转移系数（α）分别为1.43×10（4）cm（3）mol（-1）s（-1）和0.56。采用准稳态极化法进一步研究了CH3OH在Ni/Zn mMOFTFs/GCE上的电催化氧化，测定了反应速率常数k（2）Gamma=2.866 x 10（-9）cm s（-1），k0-1/k01=2.08 x 10（8）的比值。这些结果表明，Ni（ii）离子在Zn mMOFTFs中的掺入对CH3OH的氧化产生了显著的电催化活性，从而为设计用于直接CH3OH燃料电池系统的高性能电催化剂开辟了一条新途径。

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  • 来源
    《New Journal of Chemistry》 |2021年第5期|共12页
  • 作者

    Pashazadeh Ali; Habibi Biuck;

  • 作者单位

    Azarbaijan Shahid Madani Univ Fac Sci Dept Chem Electroanalyt Chem Lab Tabriz 53714161 Iran;

    Azarbaijan Shahid Madani Univ Fac Sci Dept Chem Electroanalyt Chem Lab Tabriz 53714161 Iran;

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  • 正文语种 eng
  • 中图分类 化学;
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