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首页> 外文期刊>Electrocatalysis >Correlation Between Calcination Temperature and Bifunctional Catalytic Activity for Oxygen Electrode Reaction of Bismuth Ruthenate Pyrochlore in KOH Solution
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Correlation Between Calcination Temperature and Bifunctional Catalytic Activity for Oxygen Electrode Reaction of Bismuth Ruthenate Pyrochlore in KOH Solution

机译：酸铋钌酸铋含氧电极反应煅烧温度和双官能催化活性的相关性

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摘要

The oxygen electrode reactions (oxygen reduction reaction (ORR) and oxygen evolution reaction (OER)) of the pyrochlore-type metal oxide containing Bi and Ru (BRO) were investigated. In this study, we report that the correlation between the calcination temperature and the bifunctional catalytic activity of BRO in a KOH aqueous solution. BRO was prepared by the co-precipitation method in aqueous medium using Bi(NO3)(3), RuCl3, and NaOH and following the calcination at 500-700 degrees C. The characterization was carried out by synchrotron XRD and temperature-programmed reduction technique. It was found that the oxygen contents of BRO decreased with rising the calcination temperature. The catalytic behavior of BRO towards ORR and OER was evaluated by hydrodynamic voltammetry using a rotating disk electrode and a rotating ring-disk electrode technique. Tafel slopes for the ORR and OER decreased with an increase in the calcination temperature from 500 to 600 degrees C, while the onset potentials for both reactions were almost same. The results of this study suggest that the oxygen content of BRO is one of the factors that determine the catalytic activity for the oxygen electrode reactions.
机译：研究了含有Bi和Ru（兄弟）的含有烧火型金属氧化物的氧电极反应（氧还原反应（ORR）和氧气进化反应（oer）。在这项研究中，我们报告说，煅烧温度与KOH水溶液中兄弟的双官能催化活性之间的相关性。通过使用Bi（NO 3）（3），RuCl3和NaOH的水性介质中的共沉淀法并在500-700℃下进行煅烧制备兄弟。通过同步XRD和温度编程的还原技术进行表征。发现ZO的氧含量随着煅烧温度上升而降低。使用旋转盘电极和旋转环盘电极技术，通过流体动力伏安法评估兄弟朝向ORR和OER的催化行为。 ORR和Oer的Tafel斜率随着煅烧温度的增加而下降500至600℃，而两个反应的起始电位几乎相同。该研究的结果表明，兄弟的氧含量是确定氧电极反应的催化活性的因素之一。

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  • 来源
    《Electrocatalysis》 |2018年第2期|共7页
  • 作者

    Kinumoto Taro; Ono Kohei; Eto Makoto; Matsumura Kazuki; Matsuoka Miki; Tsumura Tomoki; Toyoda Masahiro;

  • 作者单位

    Oita Univ Div Appl Chem Dept Integrated Sci &

    Technol Fac Sci &

    Technol 700 Dannoharu Oita 8701192 Japan;

    Oita Univ Div Appl Chem Dept Integrated Sci &

    Technol Fac Sci &

    Technol 700 Dannoharu Oita 8701192 Japan;

    Oita Univ Div Appl Chem Dept Integrated Sci &

    Technol Fac Sci &

    Technol 700 Dannoharu Oita 8701192 Japan;

    Oita Univ Div Appl Chem Dept Integrated Sci &

    Technol Fac Sci &

    Technol 700 Dannoharu Oita 8701192 Japan;

    Oita Univ Div Appl Chem Dept Integrated Sci &

    Technol Fac Sci &

    Technol 700 Dannoharu Oita 8701192 Japan;

    Oita Univ Div Appl Chem Dept Integrated Sci &

    Technol Fac Sci &

    Technol 700 Dannoharu Oita 8701192 Japan;

    Oita Univ Div Appl Chem Dept Integrated Sci &

    Technol Fac Sci &

    Technol 700 Dannoharu Oita 8701192 Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学动力学、催化作用;
  • 关键词

    Bismuth ruthenate; Oxygen reduction reaction; Oxygen evolution reaction; Oxygen content;

    机译：铋钌酸盐;氧还原反应;氧气进化反应;氧含量;

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