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利用电化学聚合分别制备了铂(Pt)及其铂钌(PtRu)/聚苯胺(PAN)/聚砜(PSF)复合膜电极。采用循环伏安法和电化学交流阻抗对复合膜电极的甲醇电催化氧化性能进行了比较与分析。结果表明:PtRu/PAN/PSF电极对甲醇的电催化活性比Pt/PAN/PSF电极的高,铂钌的沉积不仅改变了催化剂表面对氢的吸附性质,而且使氧化物还原峰电位向阴极方向移动。另外,对在不同浓度下沉积的铂钌电极对甲醇的催化效果也做了讨论,验证了RPt∶Ru=2∶1时,复合膜电极具有最好的催化活性。 相似文献
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在采矿过程中,会不可避免的对周边的环境造成一定程度的伤害和污染,所以将绿色开采技术引入到采矿过程中。通过在采矿工程中运用绿色开采技术,可以有效的缓解开采造成的环境污染和破坏,将资源开发和环境保护有效的统一,促进我国经济效益以及社会效益和环境效益的全面统一。 相似文献
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随着我国煤矿开采技术的提高以及煤矿规模的扩大,煤矿的深度开采安全因素越来越复杂,这都给矿井建设增加了难度。本文基于煤矿安全密切相关的矿建工程风险管理体系不完善的现状,针对矿建工程安全风险的系统特点,从安全风险控制策略、安全风险控制监测和预警方面作出了研究。增加了矿建工程管理体系的内容,为我国矿井建设的科学管理和安全高效的发展提供了参考依据。 相似文献
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The polyaniline/polysulfone(PAN/PSF) composite films were prepared by electropolymerization,and then CeO2-Pt particles were codeposited into this composite film to obtain the CeO2-Pt-modified polyaniline/polysulfone(CeO2-Pt/PAN/PSF) electrodes.Their morphol-ogy and chemical component were characterized by field emission scanning electron microscopy(FESEM) and energy dispersive X-ray spectroscopy(EDS),respectively.The results showed that the composite film had bi-layer structure with asymmetrical pores,and platinum and cerium oxide particles were homogeneously dispersed in the modified film electrodes.The cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) techniques were applied to investigate the electrocatalytic activity of the Pt-CeO2/PAN/PSF electrodes.It was indicated that appropriate amount of CeO2 could enhance the catalytic activity of Pt for methanol electro-oxidation.Chronoamperometry(i-t) measurements revealed that the Pt-CeO2/PAN/PSF electrode was relatively endurable for intermediate production.In addition,different mix-ing amounts of Pt and CeO2 nanoparticles were also investigated in detail. 相似文献
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