Composite films of polyaniline and molybdenum oxide formed by electrocodeposition in aqueous media
Composite films of polyaniline and molybdenum oxide formed by electrocodeposition in aqueous media
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DOI：
10.1007/s10008-007-0287-3
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发表时间：
2007-02
影响因子：
2.5
通讯作者：
Xiao-Xia Liu;Lijun Bian;Lu Zhang;Li-Jun Zhang
中科院分区：
文献类型：
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作者：
Xiao-Xia Liu;Lijun Bian;Lu Zhang;Li-Jun Zhang
以苯胺和（NH4）6Mo7O24为原料，采用简便的电共沉积方法制备了聚苯胺（PANI）和氧化钼（MoOx）复合薄膜。复合膜在循环伏安图上分别表现出聚苯胺和MoOx的氧化还原行为。氯酸盐和溴酸盐在复合膜上的催化电还原电位比在MoOx上高0.2 V左右。复合膜在1.0 mol·dm - 3nano3下显示赝电容特性的电位窗口为- 0.6 ~ 0.6 V vs SCE。与目前报道的聚苯胺（PANI）基材料相比，阴极电位极限至少负移了0.4 V。在1.5 mA·cm−2下充放电时，复合膜的比电容为363.6 F·g−1，约为同类制备的聚苯胺的2倍。采用傅里叶变换红外光谱（FTIR）、x射线衍射（XRD）和x射线光电子能谱（XPS）对复合膜进行了表征。XRD和XPS研究表明，复合膜中钼以+5和+6的混合态存在。pani和（MoOx）在苯胺和（NH4）6Mo7O24水溶液中电共沉积。所制备的复合膜对氧阴离子的电还原具有催化活性。复合膜的赝电容是聚苯胺的近两倍，电位窗口负扩展至- 0.6 V vs SCE
Composite films of polyaniline (PANI) and molybdenum oxide (MoOx) were afforded through a convenient route of electrocodeposition from aniline and (NH4)6Mo7O24. The composite films showed characteristic redox behaviors of PANI and MoOx, respectively, on the cyclic voltammograms. Chlorate and bromate were catalytically electroreduced with an enlarged current on the composite film at a potential ca. 0.2 V more positive than that on MoOx. The potential window for the composite film to display pseudocapacitive properties in 1.0 mol·dm−3NaNO3was −0.6 ∼ 0.6 V vs SCE. The cathodic potential limit shifted at least 0.4 V negatively from that of polyaniline (PANI)-based materials reported so far. The specific capacitance was 363.6 F·g−1when the composite film was charged–discharged at 1.5 mA·cm−2, about two times of that of the similarly prepared PANI. The composite film was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Molybdenum existed in a mixed state of +5 and +6 in the composite film based on XRD and XPS investigations.FigurePANI and (MoOx) were electrocodeposited in aqueous solutions from aniline and (NH4)6Mo7O24. The composite film obtained displayed catalytic activities toward the electroreduction of oxoanions. The pseudocapacitance of the composite film is nearly two times of that of PANI with the potential window extended negatively up to −0.6 V vs SCE