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Atomic-level insight into reasonable design of metal-based catalysts for hydrogen oxidation in alkaline electrolytes

机译：碱性电解质氢氧化金属基催化剂合理设计的原子级洞察

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摘要

Anion exchange membrane fuel cells (AEMFCs) are becoming highly attractive for hydrogen utilization owing to the advantages of employing economic catalysts in alkaline electrolytes. Nevertheless, the kinetics of the anodic hydrogen oxidation reaction (HOR) in alkaline electrolytes, even catalyzed by the state-of-the-art Pt catalysts, is two orders of magnitude lower than that in acidic systems. Accordingly, developing highly efficient electrocatalysts for the HOR in alkaline electrolytes becomes fundamentally important and especially urgent. Here, the reaction mechanism of the HOR under alkaline conditions is briefly presented as the prerequisite for investigating catalysts towards the alkaline HOR. Meanwhile, the critical roles of the atomic coordination configuration, atomic stacking behaviors and atomic arrangement of metal-based catalysts in catalyzing the HOR under alkaline conditions are systematically discussed to provide atomic-level understanding for the development of HOR catalysts. Furthermore, potential synthesis methods of metal-based catalysts with well-confined structures are illustrated. Finally, the remaining challenges and promising avenues for efficiently developing catalysts towards the alkaline HOR are highlighted for future studies in this field.
机译：由于在碱性电解质中使用经济催化剂的优点，阴离子交换膜燃料电池（AEMFC）对氢利用具有高度吸引力。然而，阳极氧化反应（Hor）在碱性电解质中的动力学，甚至通过最先进的Pt催化剂催化，是比酸性系统中的两个数量级。因此，在碱性电解质中为HOR开发高效的电催化剂变得根本重要，特别是迫切。这里，简要介绍HOR在碱性条件下的反应机制作为调查碱性胰岛催化剂的先决条件。同时，系统地讨论了原子配位构造，原子堆积行为和金属基催化剂在碱性条件下催化下的金属催化剂的临界作用以提供原子水平的荷催化剂的发育的理解。此外，示出了具有良好限制结构的金属基催化剂的潜在合成方法。最后，突出了在该领域的未来研究中突出了剩余挑战和有效的途径。

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  • 来源
    《Energy & environmental science》 |2021年第5期|2620-2638|共19页
  • 作者

    An Lulu; Zhao Xu; Zhao Tonghui; Wang Deli;

  • 作者单位

    Huazhong Univ Sci & Technol Sch Chem & Chem Engn Hubei Key Lab Mat Chem & Serv Failure Minist Educ Key Lab Mat Chem Energy Convers & Sto Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol Sch Chem & Chem Engn Hubei Key Lab Mat Chem & Serv Failure Minist Educ Key Lab Mat Chem Energy Convers & Sto Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol Sch Chem & Chem Engn Hubei Key Lab Mat Chem & Serv Failure Minist Educ Key Lab Mat Chem Energy Convers & Sto Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol Sch Chem & Chem Engn Hubei Key Lab Mat Chem & Serv Failure Minist Educ Key Lab Mat Chem Energy Convers & Sto Wuhan 430074 Hubei Peoples R China;

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