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One-pot electrosynthesis and physicochemical properties of multifunctional material based on graphene oxide, poly-o-phenylenediamine, and silicotungstic acid
Journal of Solid State Electrochemistry ( IF 2.6 ) Pub Date : 2020-11-13 , DOI: 10.1007/s10008-020-04859-w
E. Yu. Pisarevskaya , A. L. Klyuev , A. A. Averin , A. M. Gorbunov , O. N. Efimov

The methods of silicotungstic acid (SiW) immobilization on conducting substrates were studied. For SiW immobilization by codeposition, poly-o-phenylenediamine (PPD) redox polymer was used. The most effective codeposition of SiW and PPD was demonstrated on a graphene oxide (GO) film. Meanwhile, GO is reduced to form RGO-PPD-SiW electroactive composite. The structure of the novel material was evidenced by cyclic voltammetry and IR and Raman spectra. PPD-SiW and RGO-PPD-SiW composites were studied by impedance spectroscopy, where an equivalent circuit was proposed. Film resistance Rf was shown to decrease in the series of PPD → RGO-PPD → RGO-PPD-SiW. Further, RGO-PPD-SiW has better transfer properties (bulk film diffusion rate). This enabled suggesting that the composite has better electrocatalytic properties than PPD and RGO-PPD as was evidenced for example of [Fe(CN)6]4−/3− redox transfer on the electrode coated with the novel material.



中文翻译:

基于氧化石墨烯,聚邻苯二胺和硅钨酸的多功能材料的一锅电合成和理化性质

研究了硅钨酸(SiW)固定在导电基底上的方法。为了通过共沉积固定SiW,使用了聚邻苯二胺(PPD)氧化还原聚合物。SiW和PPD的最有效共沉积在氧化石墨烯(GO)薄膜上得到了证明。同时,GO被还原以形成RGO-PPD-SiW电活性复合材料。通过循环伏安法,红外和拉曼光谱证明了该新型材料的结构。通过阻抗谱研究了PPD-SiW和RGO-PPD-SiW复合材料,并提出了等效电路。膜电阻R f在PPD→RGO-PPD→RGO-PPD-SiW系列中显示减少。此外,RGO-PPD-SiW具有更好的转移性能(体膜扩散速率)。这使得该复合材料具有比PPD和RGO-PPD更好的电催化性能,例如在涂覆有该新型材料的电极上的[Fe(CN)6 ] 4- / 3-氧化还原转移证明。

更新日期:2020-11-15
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