Graphitic C₃N₄@MWCNTs supported Mn₃O₄ as a novel electrocatalyst for the oxygen reduction reaction in zinc–air batteries

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• 作者：Guanghua Li ; Tao Sun ; Yan Fu ; Lixu Lei ; Ou Zhuo
• 关键词：G ; C3N4 ; MWCNTs ; ORR ; ZABs ; Mn3O4
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：20
• 期：10
• 页码：2685-2692
• 全文大小：1,729 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Analytical Chemistry
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  Condensed Matter
  Electronic and Computer Engineering
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1433-0768
• 卷排序：20

文摘

A series of catalysts (g-C₃N₄@MWCNTs/Mn₃O₄) were prepared from g-C₃N₄, MWCNTs, and Mn₃O₄ for oxygen reduction reaction (ORR) in zinc–air batteries. From the half-cell tests, the loading of 35 % Mn₃O₄ (sample GMM35) presents an excellent activity toward ORR in alkaline condition. Rotating ring-disk electrode (RRDE) studies reveal that 3.6∼3.8 electrons are transferred with a H₂O₂ yield of 11.4 % at −0.4 V. Meanwhile, the GMM35 nanocomposite exhibits the same durability as commercial 20 wt% Pt/C in alkaline condition, but it shows lower peak power density (192.4 mW cm−2 at 229.1 mA cm−2) and cell voltage than those with a commercial Pt/C catalyst (260.9 mW cm−2 at 285.4 mA cm−2).