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首页> 外文期刊>Energy & environmental science >Oxygen evolution catalysts on supports with a 3-D ordered array structure and intrinsic proton conductivity for proton exchange membrane steam electrolysis
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Oxygen evolution catalysts on supports with a 3-D ordered array structure and intrinsic proton conductivity for proton exchange membrane steam electrolysis

机译：带有3-D有序阵列结构和固有质子传导性的载体上的析氧催化剂，用于质子交换膜蒸汽电解

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摘要

Proton exchange membrane steam electrolyzers suffer from insufficient catalyst activity and durability due to the slow reaction kinetics for oxygen evolution reaction (OER) and poor durability under harsh operating environments. Aiming at enhancement of oxygen electrode kinetics and durability, composite support materials for iridium oxide are synthesized via in situ phosphorization reaction on tin doped indium oxide and possess functionalities of high electronic and intrinsic proton conductivity. At 130 ℃ under a water vapor atmosphere an overall conductivity of 0.72 S cm"1 is achieved with a contribution of around 10~(-2) S cm"1 proton conductivity. The support structure of three-dimensionally ordered hexagonal arrays displays a high specific surface area of 180 m~2 g~(-1). Benefiting from the mixed conductivities and porous structure in the composite support materials, the supported lrO_2 catalysts exhibit about five times enhancement of the OER activity in acidic electrolytes. The improved catalytic performance for the OER was further confirmed by PEM electrolyzer tests at 130 ℃. A test of such a steam electrolyzer cell at 350 mA cm~(-2) shows good durability within a period of up to 1150 hours.
机译：质子交换膜蒸汽电解槽由于用于放氧反应（OER）的反应动力学较慢，并且在恶劣的操作环境下耐久性差，因此催化剂活性和耐久性不足。为了提高氧电极的动力学性能和耐久性，通过在掺锡的氧化铟上进行原位磷化反应合成了氧化铱的复合载体材料，并具有较高的电子和固有质子传导性。在130℃的水蒸气气氛下，总电导率为0.72 S cm-1，质子电导率约为10〜（-2）S cm-1。三维有序六边形阵列的支撑结构显示出180 m〜2 g〜（-1）的高比表面积。得益于复合载体材料中的混合电导率和多孔结构，负载的lrO_2催化剂在酸性电解质中的OER活性提高了约5倍。在130℃下的PEM电解槽试验进一步证实了OER催化性能的改善。在350 mA cm〜（-2）的条件下对这种蒸汽电解槽进行的测试显示出长达1150小时的良好耐久性。

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  • 来源
    《Energy & environmental science》 |2014年第2期|820-830|共11页
  • 作者

    Junyuan Xu; David Aili; Qingfeng Li; Erik Christensen; Jens Oluf Jensen; Wei Zhang; Martin Kalmar Hansen; Gaoyang Liu; Xindong Wang; Niels J. Bjerrum;

  • 作者单位

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China ,Department of Physical Chemistry, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China ,Proton Conductors Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark;

    Proton Conductors Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark;

    Proton Conductors Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark;

    Proton Conductors Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark;

    Proton Conductors Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark;

    Imaging and Structural Analysis Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, DK-4000 Roskilde, Denmark;

    Proton Conductors Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China ,Department of Physical Chemistry, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China;

    State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China ,Department of Physical Chemistry, University of Science and Technology Beijing, 30 College Road, Beijing 100083, China;

    Proton Conductors Department of Energy Conversion and Storage, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark;

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