高等学校化学学报
高等學校化學學報
고등학교화학학보
Chemical Journal of Chinese Universities
2015年
10期
2016-2023
,共8页
李志盼%彭迎祥%杨士锋%张瑞%李凯%左霞
李誌盼%彭迎祥%楊士鋒%張瑞%李凱%左霞
리지반%팽영상%양사봉%장서%리개%좌하
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
X 射線吸收精細結構光譜%微波閤成%聚閤酞菁鐵%多壁碳納米管%氧還原
X 사선흡수정세결구광보%미파합성%취합태정철%다벽탄납미관%양환원
X-ray absorption fine spectroscopy(XAFS)%Microwave method%Iron phthalocyanine polymer%Multi-walled carbon nanotube%Oxygen reduction
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-FePc/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 FePPc/ 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-FePc/ 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, FePPc/ 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。
採用高效、便捷的微波閤成法製備瞭4種不同結構的聚閤酞菁鐵/多壁碳納米管( Poly-FePc/MWCNTs)複閤材料併進行瞭錶徵。結果錶明,聚閤酞菁鐵均勻地包裹在多壁碳納米管上。利用線性掃描電位法(LSV)和電化學阻抗法(EIS)對材料的氧還原催化活性進行瞭研究,髮現 FePPc/ MWCNTs 複閤材料具有最好的氧還原催化活性。採用 X 射線光電子能譜( XPS)和 X 射線吸收精細結構光譜( XAFS)研究瞭Poly-FePc/ MWCNTs 複閤材料中酞菁鐵結構變化與氧還原催化性能的相關性。結果錶明, FePPc/ MWCNTs 複閤材料中 Fe-N4接近平麵結構,聚閤酞菁鐵能夠更好地與 MWCNTs 產生協同作用,從而加速氧還原過程中電子的轉移,提高氧還原活性。
채용고효、편첩적미파합성법제비료4충불동결구적취합태정철/다벽탄납미관( Poly-FePc/MWCNTs)복합재료병진행료표정。결과표명,취합태정철균균지포과재다벽탄납미관상。이용선성소묘전위법(LSV)화전화학조항법(EIS)대재료적양환원최화활성진행료연구,발현 FePPc/ MWCNTs 복합재료구유최호적양환원최화활성。채용 X 사선광전자능보( XPS)화 X 사선흡수정세결구광보( XAFS)연구료Poly-FePc/ MWCNTs 복합재료중태정철결구변화여양환원최화성능적상관성。결과표명, FePPc/ MWCNTs 복합재료중 Fe-N4접근평면결구,취합태정철능구경호지여 MWCNTs 산생협동작용,종이가속양환원과정중전자적전이,제고양환원활성。
Four iron-phthalocyanine polymers/ multi-walled carbon nanotubes ( Poly-FePc / 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-FePc / MWCNTs was measured by linear sweep voltammetry(LSV) and electrochemical impedance spectrometry(EIS), the results demonstrated that FePPc / MWCNTs exhibited the best oxygen reduction catalytic activity. Finally, the relation-ship between the electrocatalytic activity and molecular structures of Poly-FePc / MWCNTs was revealed by X-ray photoelectron spectroscopy(XPS) and X-ray absorption fine spectroscopy(XAFS). The results showed that if Fe-N4 in FePPc / 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 elec-trons transfer and enhance the oxygen reduction catalytic activity of the composite.