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首页> 外文期刊>New Journal of Chemistry >Simple preparation of carbon-bimetal oxide nanospinels for high-performance bifunctional oxygen electrocatalysts
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Simple preparation of carbon-bimetal oxide nanospinels for high-performance bifunctional oxygen electrocatalysts

机译：用于高性能双官能氧气电催化剂的碳二金属氧化物纳米型的简单制备

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摘要

The lack of efficient cost-effective electrocatalysts for reversible oxidation of water is by far the most notorious obstacle in the development of fuel cells and electrolyzers. Here, oxygen bifunctional electrocatalysts based on C-CoFe and C-NiFe oxide nanospinels are developed by simple autocombustion between ethylene glycol/acetate and the metal nitrates. The effects of electronic modulation and the mass (or surface area) effect were examined based on the cyclic voltammograms of the unary and binary metal oxides in alkaline solution, and their high oxygen evolution and reduction activities were attributed to the synergic intermetallic interactions. The C-CoFe oxide, in particular, shows an oxygen evolution overpotential of 350 mV (without iR correction) at 10 mA cm(-2) with excellent stability over 10 hours and a Tafel slope of 49 mV per decade. Furthermore, it exhibits the highest oxygen reduction activity among the synthesized electrocatalysts due the particular synergy between Co and Fe centers.
机译：对于可逆氧化水的缺乏有效的经济高效的电催化剂是迄今为止燃料电池和电解器的开发中最臭名昭着的障碍。这里，基于C-COFE和C-NIFE氧化物纳米型氧化物的氧双功能电催化剂由乙二醇/乙酸乙酯和金属硝酸盐之间的简单自容式开发。基于碱性溶液中的机会和二元金属氧化物的循环伏安图检查了电子调制和质量（或表面积）效应的影响，并且其高氧化和还原活性归因于协同金属间相互作用。特别地，C-COFE氧化物显示出在10mA cm（-2）的10mA cm（-2）下的氧气进化，超过10小时的稳定性，每十年49mV的Tafel斜率为49 mV。此外，由于CO和Fe中心之间的特定协同作用，它在合成的电催化剂中表现出最高的氧还原活性。

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  • 来源
    《New Journal of Chemistry》 |2018年第24期|共7页
  • 作者

    Malaie Keyvan; Jeyabharathi Chinnaiah; Wulff Harm; Ganjali Mohammad Reza; Soavi Francesca; Scholz Fritz;

  • 作者单位

    Univ Tehran Sch Chem Ctr Excellence Electrochem Coll Sci Enghelab St Tehran 1417614411 Iran;

    Ernst Moritz Arndt Univ Greifswald Inst Biochem Felix Hausdorff Str 4 D-17487 Greifswald Germany;

    Ernst Moritz Arndt Univ Greifswald Inst Phys Felix Hausdorff Str 4 D-17487 Greifswald Germany;

    Univ Tehran Sch Chem Ctr Excellence Electrochem Coll Sci Enghelab St Tehran 1417614411 Iran;

    Alma Mater Studiorum Univ Bologna Dept Chem Giacomo Ciamician Via Selmi 2 I-40126 Bologna Italy;

    Ernst Moritz Arndt Univ Greifswald Inst Biochem Felix Hausdorff Str 4 D-17487 Greifswald Germany;

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  • 正文语种 eng
  • 中图分类 化学;
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