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首页> 外文期刊>Advanced Functional Materials >Boosting Oxygen Dissociation over Bimetal Sites to Facilitate Oxygen Reduction Activity of Zinc-Air Battery
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Boosting Oxygen Dissociation over Bimetal Sites to Facilitate Oxygen Reduction Activity of Zinc-Air Battery

机译：在双金属位点提高氧解离，以促进锌空气电池的氧还原活性

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摘要

Zinc-air battery is of great interest but its wide-ranging application is impeded by the sluggish cathodic reactions, especially the oxygen reduction reaction. Despite blooming development in the past decades, achieving further breakthroughs in the activity improvement still appears challenging. Herein, the critical role of bimetal sites in boosting oxygen reduction activity is identified with the combination of theoretical calculations and electrochemical experiments. Density functional theory calculations suggest the elongation of O-O bond over the dual-atom system, which is beneficial to its following dissociation and thus enhances the efficiency of the reaction. The proof-of-concept electrocatalyst experimentally delivers a half-wave potential of 0.92 V versus reversible hydrogen electrode and kinetic current density of 51.9 mA cm(-2), significantly outperforming the commercial Pt/C. Both aqueous and all-solid-state zinc-air battery assembled with such catalyst demonstrate superior durability with little performance fluctuation, confirming their potential feasibility in the practical applications.
机译：锌 - 空气电池具有很大的兴趣，但其宽范围的应用受到缓慢的阴极反应，尤其是氧还原反应阻碍。尽管在过去的几十年中，尽管发展盛开，但在活动改善方面取得了进一步的突破仍然似乎挑战。这里，用理论计算和电化学实验的组合鉴定了双金属位点在升压氧还原活性方面的关键作用。密度函数理论计算表明O-O键对双原子系统的伸长，这有利于其以下解离，从而提高反应的效率。概念证明电催化剂实验地提供了0.92 V的半波电位，而可逆氢电极和动力电流密度为51.9 mA cm（-2），显着优于商业Pt / c。用这种催化剂组装的水和全固态锌空气电池均表现出优异的耐用性，性能波动几乎没有，确认其在实际应用中的潜在可行性。

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  • 来源
    《Advanced Functional Materials》 |2021年第4期|2006533.1-2006533.8|共8页
  • 作者

    Sun He; Wang Mengfan; Zhang Shenghui; Liu Sisi; Shen Xiaowei; Qian Tao; Niu Xiaobin; Xiong Jie; Yan Chenglin;

  • 作者单位

    Univ Elect Sci & Technol China State Key Lab Elect Thin Films & Integrated Devic Chengdu 610054 Peoples R China;

    Soochow Univ Key Lab Adv Opt Mfg Technol Jiangsu Prov Key Lab Adv Carbon Mat & Wearable Energy Technol Coll Energy Suzhou 215006 Peoples R China|Soochow Univ Minist China Key Lab Modern Opt Technol Educ Suzhou 215006 Peoples R China;

    Univ Elect Sci & Technol China Sch Mat & Energy Chengdu 610054 Peoples R China;

    Soochow Univ Key Lab Adv Opt Mfg Technol Jiangsu Prov Key Lab Adv Carbon Mat & Wearable Energy Technol Coll Energy Suzhou 215006 Peoples R China|Soochow Univ Minist China Key Lab Modern Opt Technol Educ Suzhou 215006 Peoples R China;

    Soochow Univ Key Lab Adv Opt Mfg Technol Jiangsu Prov Key Lab Adv Carbon Mat & Wearable Energy Technol Coll Energy Suzhou 215006 Peoples R China|Soochow Univ Minist China Key Lab Modern Opt Technol Educ Suzhou 215006 Peoples R China;

    Soochow Univ Key Lab Adv Opt Mfg Technol Jiangsu Prov Key Lab Adv Carbon Mat & Wearable Energy Technol Coll Energy Suzhou 215006 Peoples R China|Soochow Univ Minist China Key Lab Modern Opt Technol Educ Suzhou 215006 Peoples R China;

    Univ Elect Sci & Technol China Sch Mat & Energy Chengdu 610054 Peoples R China;

    Univ Elect Sci & Technol China State Key Lab Elect Thin Films & Integrated Devic Chengdu 610054 Peoples R China;

    Soochow Univ Key Lab Adv Opt Mfg Technol Jiangsu Prov Key Lab Adv Carbon Mat & Wearable Energy Technol Coll Energy Suzhou 215006 Peoples R China|Soochow Univ Minist China Key Lab Modern Opt Technol Educ Suzhou 215006 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bimetal; electrocatalysis; oxygen reduction reaction; zinc-air battery;

    机译：双金属;电催化;氧还原反应;锌 - 空气电池;

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