聚合酞菁铁/多壁碳纳米管复合材料的制备及氧还原催化性能  

Preparation and Oxygen Reduction Catalytic Performance of Iron-phthalocyanine Polymer/Multi-walled Carbon Nanotubes Composites

作　　者：李志盼 彭迎祥 杨士锋[1] 张瑞[1] 李凯[1] 左霞[1] 

机构地区：[1]首都师范大学化学系,北京100048

出　　处：《高等学校化学学报》2015年第10期2016-2023,共8页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:11179033)资助~~

摘　　要：采用高效、便捷的微波合成法制备了4种不同结构的聚合酞菁铁/多壁碳纳米管(Poly-Fe Pc/MWCNTs)复合材料并进行了表征.结果表明,聚合酞菁铁均匀地包裹在多壁碳纳米管上.利用线性扫描电位法(LSV)和电化学阻抗法(EIS)对材料的氧还原催化活性进行了研究,发现Fe PPc/MWCNTs复合材料具有最好的氧还原催化活性.采用X射线光电子能谱(XPS)和X射线吸收精细结构光谱(XAFS)研究了Poly-Fe Pc/MWCNTs复合材料中酞菁铁结构变化与氧还原催化性能的相关性.结果表明,Fe PPc/MWCNTs复合材料中Fe-N4接近平面结构,聚合酞菁铁能够更好地与MWCNTs产生协同作用,从而加速氧还原过程中电子的转移,提高氧还原活性.Four iron-phthalocyanine polymers / multi-walled carbon nanotubes（ Poly-Fe Pc / MWCNTs）composites were sythetized by an efficient and facile microwave method. The ultraviolet-visible（ UV-Vis）spectroscopy and transmission electron microscopy（ TEM） results showed that the iron-phthalocyanine polymers had uniformly loaded onto the MWCNTs. The oxygen reduction reaction activity of Poly-Fe Pc / MWCNTs was measured by linear sweep voltammetry（ LSV） and electrochemical impedance spectrometry（ EIS）,the results demonstrated that Fe PPc / MWCNTs exhibited the best oxygen reduction catalytic activity. Finally,the relationship between the electrocatalytic activity and molecular structures of Poly-Fe Pc / MWCNTs was revealed by X-ray photoelectron spectroscopy（ XPS） and X-ray absorption fine spectroscopy（ XAFS）. The results showed that if Fe-N4 in Fe PPc / MWCNTs presents a square planar structure,it could improve the synergistic effect between the iron-phthalocyanine polymers and the MWCNTs. As a consequence,it can accelerate the electrons transfer and enhance the oxygen reduction catalytic activity of the composite.

关 键 词：X射线吸收精细结构光谱 微波合成 聚合酞菁铁 多壁碳纳米管 氧还原 

分 类 号：O646[理学—物理化学]