纳米铂/碳纳米管/细菌纤维素导电水凝胶电极膜的制备及性能研究

Shumin Liu, Jing Chen, Jinpeng Sun
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引用次数: 0

摘要

利用细菌纤维素(BC)的天然纳米网状结构、多壁碳纳米管(MWCNTs)良好的导电性和纳米铂(PtNPs)良好的电催化活性,设计了由PtNPs和纳米铂(PtNPs)组成的三孔导电水凝胶。采用超声辅助电泳沉积工艺实现了MWCNTs在BC薄膜上的浸润掺杂,保证了电极膜的离子导电和电子导电双重特性。利用BC对氯铂酸的吸附能力和硼氢化钠的强还原性,在MWCNTs/BC多孔层状导电水凝胶电极膜上实现了高负荷PtNPs的复合。通过测试PtNPs/MWCNTs/BC导电水凝胶电极膜的电化学性能和微观结构表征,该电极膜不仅具有高电活性面积、低表面电荷转移电阻和良好的扩散渗透性等电化学特性,而且在PBS溶液中对葡萄糖表现出较高的催化活性。最重要的发现是电极膜可以在富氧PBS溶液中选择性催化葡萄糖。PtNPs/MWCNTs/BC电极膜的多孔层状结构和PtNPs的高负载分散性是PtNPs/MWCNTs/BC导电水凝胶电极膜具有选择性催化能力的原因,可用于植入式表面葡萄糖燃料电池。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Preparation and Properties of Nano Platinum/Carbon Nanotubes/Bacterial Cellulose Conductive Hydrogel Electrode Films
Using the natural nanomesh structure of bacterial cellulose (BC), the good conductivity of multi-walled carbon nanotubes (MWCNTs) and the good electrocatalytic activity of nano platinum (PtNPs), a three-way porous conductive hydrogel of PtNPs and BC was designed. The infiltrating and doping of MWCNTs on BC thin films was realized by ultrasonic assisted electrophoretic deposition process, which ensured the dual characteristics of ionic and electronic conduction of electrode films. The adsorption capacity of BC for chloroplatinic acid and the strong reductivity of sodium borohydride were also used to realize the high-load PtNPs recombination on MWCNTs/BC porous layered conductive hydrogel electrode films. By testing the electrochemical performance of PtNPs/MWCNTs/BC conductive hydrogel electrode film and characterization of microstructure, the electrode film not only has high electroactive area, low surface charge transfer resistance and good diffusion permeability and other electrochemical characteristics, but also shows high catalytic activity for glucose in PBS solution. The most important finding is that the electrode film can selectively catalyze glucose in oxygen-rich PBS solution. The porous layered structure of PtNPs/MWCNTs/BC electrode membrane and the high load dispersion of PtNPs are the reasons for the selective catalytic ability of PtNPs/MWCNTs/BC conductive hydrogel electrode membrane, which can be used for the implanted surface glucose fuel cell.
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