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首页> 外文期刊>Nano Energy >Activation of transition metal oxides by in-situ electro-regulated structure-reconstruction for ultra-efficient oxygen evolution
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Activation of transition metal oxides by in-situ electro-regulated structure-reconstruction for ultra-efficient oxygen evolution

机译:用原位电控结构改造对过渡金属氧化物的激活,用于超高效氧气进化

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摘要

Cobalt oxides with abundant defects, including those with fully exposed active sites and abundant oxygen vacancies, exhibit superb catalytic activities towards oxygen evolution reaction (OER). Herein, we report a facile in-situ electrochemical self-optimization strategy to produce carbon-fiber-supported defective CoOx (E-CoOx/CF), in which the partial self-dissolution of acidic oxides under alkaline OER operational conditions and releasing of in-situ generated oxygen molecules are taken as advantages for reconstruction of Co species with abundant defects, Co2+ and oxygen vacancies. The resultant E-CoOx/CF can achieve 10 mA cm(-2) at a low overpotential of 249 mV with a remarkable stability (> 100 h without performance decay). Moreover, this electrochemical etching method can also be extended to the preparation of highly active transition metal nickel oxides for enhanced OER. This study represents a new yet efficient strategy for rationally designing and developing advanced transition metal oxides for various electrochemical applications and beyond.
机译:具有丰富缺陷的氧化钴,包括具有完全暴露的活性位点和丰富的氧空位,表现出极好的催化活性朝向氧气进化反应(OER)。在此,我们报告了一种容易的原位电化学自优化策略,以产生碳纤维支持的缺陷COOO(E-COOX / CF),其中碱性OER操作条件下酸性氧化物的部分自解溶解和释放-Situ产生的氧分子被认为是具有丰富缺陷,CO2 +和氧空位的CO物种的优点。得到的E-CoOX / CF可以在249mV的低过电位下达到10mA cm(-2),具有显着的稳定性(> 100小时,没有性能衰减)。此外,这种电化学蚀刻方法也可以扩展到用于增强oer的高活性过渡金属镍氧化物的制备。该研究代表了合理设计和开发各种电化学应用和超越的先进过渡金属氧化物的新且有效的策略。

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  • 来源
    《Nano Energy》 |2019年第2019期|共8页
  • 作者单位

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

    Case Western Reserve Univ Ctr Adv Sci &

    Engn Carbon Case4carbon Dept Macromol Sci &

    Engn Cleveland OH 44106 USA;

    Dalian Univ Technol State Key Lab Fine Chem Sch Chem Engn Liaoning Key Lab Energy Mat &

    Chem Engn Dalian 116024 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 能源与动力工程;
  • 关键词

    Transition metal oxides; Structure reconstruction; Electrochemical leaching; Oxygen vacancies; Oxygen evolution reaction;

    机译:过渡金属氧化物;结构重建;电化学浸出;氧气空位;氧气进化反应;

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