中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (02): 183-190.DOI: 10.3724/SP.J.1095.2010.90147

• 研究论文 • 上一篇    下一篇

碳载钴酞菁催化剂的一步法制备及其在碱性条件下对氧的电催化还原

赵伟利,周德璧*,孙新阳,谭龙辉   

  1. (中南大学化学化工学院 长沙 410083)
  • 收稿日期:2009-03-02 修回日期:2009-07-02 出版日期:2010-02-10 发布日期:2010-02-10
  • 通讯作者: 周德璧，博士生导师，男，教授; E-mail:zhoudb@mail.csu.edu.cn; 研究方向：电化学

One-step Preparation Process of Carbon Supported Co-phthalocyanine and Its Catalytic Performance for Electroreduction of Oxygen in Base Medium

ZHAO Wei-Li, ZHOU De-Bi*, SUN Xin-Yang, TAN Long-Hui   

  1. (College of Chemistry & Chemical Engineering,Central South University,Changsha 410083)
  • Received:2009-03-02 Revised:2009-07-02 Published:2010-02-10 Online:2010-02-10

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1476

被引次数

2

摘要：

通过固相加热，一步合成了以VulcanXC-72(碳黑)为载体的碳载钴酞菁(CoPc/C)复合催化剂，其可作空气电极的氧还原催化剂。通过X射线衍射、红外光谱等测试技术对催化剂进行了表征。利用极化曲线和交流阻抗（EIS）方法测试了其在碱性介质(6 mol/L NaOH)中对氧还原的催化性能。结果显示，得到的产物为CoPc/C，平均粒径30 nm。以磷酸处理的碳黑为载体，在600 ℃下制备CoPc/C复合催化剂表现出最佳催化活性。以其制备的电极在空气气氛下-0.03 V (vs. Hg/ HgO)电位时即可产生明显氧还原电流，-0.2 V时电流密度达到90×10-3 A/cm2。

关键词: 碱性燃料电池(AFC), 钴酞菁(CoPc), 氧还原(ORR)

Abstract:

A composite electrocatalyst cobalt-phthalocyanine loaded on carbon black VulcanXC-72(CoPc/C)was synthesized in one-step reaction through calcination, which could be used as the catalyst of air electrode. The product was characterized by XRD and IR techniques and shown to be CoPc/C composite with an average particle size of 30 nm. Its activity for oxygen reduction reaction(ORR) was evaluated by polarization curve and impedance spectrum in 6 mol/L KOH solution. With VulcanXC-72 pretreated in HNO3 as the carbon support, the CoPc/C calcinated at 600 ℃ exhibited the best catalytic activity. The polarization plots recorded at the electrode catalyzed with this product displyed an onset for ORR at -0.03 V（Hg/HgO）. The current density is 90×10-3 A/cm2 at -0.2 V in air.

Key words: fuel cells(AFC), cobalt-phthalocyanine(CoPc), oxygen reduction reaction(ORR)

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