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Bifunctional electrocatalyst for oxygen/air electrodes

机译：用于氧气/空气电极的双功能电催化剂

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摘要

Nano-Silver powder has been studied as bi-functional electrocatalyst for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline medium. Ag nano-powder has been prepared by a simple wet chemical method with Silver nitrate as precursor and Glucose as reducing agent. X-ray Diffraction and Scanning Electron Microscopy studies were carried out to characterize the Silver catalyst. Electrochemical oxygen evolution characterization shows anodic peak typically at the range between 0.350 and 0.514 V Vs Hg/HgO corresponding to Silver oxidation followed by the onset of oxygen evolution at 0.706 V. Oxygen reduction reaction studies carried out using Rotating Disc Electrode (RDE) confirm the four electron reaction mechanism. Ag catalyst shows promising characteristics for oxygen evolution and oxygen reduction.
机译：研究了纳米银粉作为双功能电催化剂，用于碱性介质中的氧还原反应（ORR）和氧释放反应（OER）。银纳米粉已通过简单的湿法化学方法制备，以硝酸银为前体，葡萄糖为还原剂。进行了X射线衍射和扫描电子显微镜研究以表征银催化剂。电化学氧析出特征显示阳极峰通常在0.350至0.514 V Vs Hg / HgO范围内，对应于银氧化，随后在0.706 V处析出氧。使用旋转圆盘电极（RDE）进行的氧还原反应研究证实了四电子反应机理。 Ag催化剂显示出有希望的氧释放和氧还原特性。

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  • 来源
    《Energy Conversion & Management》 |2014年第1期|545-549|共5页
  • 作者

    N. Sasikala; K. Ramya; K.S. Dhathathreyan;

  • 作者单位

    Centre for Fuel Cell Technology, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCl), 2nd Floor, IIT-M Research Park, No. 6, Kanagam Road,Taramani, Chennai 600113, India;

    Centre for Fuel Cell Technology, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCl), 2nd Floor, IIT-M Research Park, No. 6, Kanagam Road,Taramani, Chennai 600113, India;

    Centre for Fuel Cell Technology, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCl), 2nd Floor, IIT-M Research Park, No. 6, Kanagam Road,Taramani, Chennai 600113, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Oxygen reduction reaction (ORR); Oxygen evolution reaction (OER); Nano Ag powder; Alkaline medium;

    机译：氧还原反应（ORR）;氧气释放反应（OER）;纳米银粉;碱性介质;

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