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首页> 外文期刊>RSC Advances >Triple phase boundary and power density enhancement in PEMFCs of a Pt/C electrode with double catalyst layers
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Triple phase boundary and power density enhancement in PEMFCs of a Pt/C electrode with double catalyst layers

机译：双催化剂层PT / C电极PEMFC的三相边界和功率密度增强

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摘要

Exploring efficient approaches to design electrodes for proton exchange membrane fuel cells (PEMFCs) is of great advantage to overcome the current limitations of the standard platinum supported carbon (Pt/C) catalyst. Herein, a Pt/C electrode consisting of double catalyst layers (DCL) with low Pt loading of around 0.130 mg(Pt) cm(-2) is prepared using spray and electrophoresis (EPD) methods. The DCL electrode demonstrated a higher electrochemical surface area (ECSA-52.5 m(2) g(Pt)(-1)) and smaller internal resistance (133 ) as compared to single catalyst layer (SCL) sprayed (37.1 m(2) g(Pt)(-1) and 184 ) or EPD (42.4 m(2) g(Pt)(-1) and 170 ) electrodes. In addition, the corresponding DCL membrane electrode assembly (MEA), which consists of a Pt/C DCL electrode at the anode side and a Pt/C sprayed electrode at the cathode side, also showed improved PEMFC performance as compared to others. Specifically, the DCL MEA generated the highest power density of 4.9 W mg(Pt)(-1), whereas, the SCL MEAs only produced 3.1 and 3.8 W mg(Pt)(-1), respectively. The superior utilization of the Pt catalysts into the DCL MEA can originate from the enrichment of the triple phase boundary (TPB) presented on the Pt/C DCL electrode, which can strongly promote the adsorbed hydrogen intermediates' removal from the anode side, thus improving the overall PEMFC performance.
机译：探索质子交换膜燃料电池（PEMFC）设计电极的有效方法具有很大的优点，克服标准铂负载碳（PT / C）催化剂的电流限制是有利的。这里，使用喷雾和电泳（EPD）方法制备由低Pt负荷的双催化剂层（DCL）组成的Pt / C电极，其具有约0.130mg（Pt）cm（-2）。与单催化剂层（SCL）喷涂相比，DCL电极显示出较高的电化学表面积（ECSA-52.5M（2）G（ - 1））和较小的内阻（133）（37.1米（2）G. （Pt）（ - 1）和184）或环（42.4m（2）g（Pt）（ - 1）和170）电极。另外，与在阴极侧的阳极侧的Pt / c dcl电极和pt / c喷涂电极的Pt / c喷涂电极组成的相应的DCL膜电极组件（MEA）也显示出与其他相比的改善的PEMFC性能。具体而言，DCL MEA产生的4.9W¯¯毫克（Pt）的最高功率密度（ - 1），而，在SCL的MEA仅产生3.1和把3.8W毫克（PT）（ - 1），分别。 Pt催化剂的优异利用在DCL MEA中可以源自Pt / C DCl电极上呈上的三相边界（TPB），这可以强烈地促进从阳极侧的吸附氢中间体的去除，从而改善整体PEMFC性能。

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  • 来源
    《RSC Advances》 |2019年第27期|共7页
  • 作者

    Dung Van Dao; Adilbish Ganpurev; Thanh Duc Le; Lee In-Hwan; Yu Yeon-Tae;

  • 作者单位

    Chonbuk Natl Univ Res Ctr Adv Mat Dev Div Adv Mat Engn Jeonju 54896 South Korea;

    Chonbuk Natl Univ Res Ctr Adv Mat Dev Div Adv Mat Engn Jeonju 54896 South Korea;

    Chonbuk Natl Univ Res Ctr Adv Mat Dev Div Adv Mat Engn Jeonju 54896 South Korea;

    Korea Univ Dept Mat Sci &

    Engn Seoul 02841 South Korea;

    Chonbuk Natl Univ Res Ctr Adv Mat Dev Div Adv Mat Engn Jeonju 54896 South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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