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近几年,由于对节能和环境保护等全球性问题的重视,有机电化学合成成为引人注目的研究课题。然而,迄今为止工业化的有机电化学过程依然为数很少,一个很重要的原因是有机电化学合成需要特殊的反应器,用于无机电化学反应的电解槽一般不适用于有机合成。本文就旋转圆柱电极电化学反应器的特性及用于有机电化学合成进行了研究。 相似文献
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本文简要阐述了有机电化学合成的一些基本问题以及反应过程的实验研究及工业化过程开发的基本指导思想,旨在进一步拓宽有机电化学合成工作者的工业化开发思路,加速我国有机电化学合成开发工作的进程。 相似文献
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有机电化学合成反应是一种温和、高效、可控的药物绿色合成技术。本文简要介绍有机电化学合成的前沿科技结果,包括最新的电化学反应类型、光电协同催化、电酶协同催化、不对称有机电化学合成及其相关的工业化运用。结合课程特点和授课团队在有机电合成方面的研究成果,我们探索在氧化反应、还原反应、立体选择性控制等章节的教学活动中分别融入有机电化学阳极氧化反应、阴极还原反应及其电参与的协同催化反应的前沿科技成果。同时,通过指导学生开展有机电合成相关的课程设计、大创项目和竞赛等活动进一步提升学生对有机电化学合成反应的理解与运用能力。该项教学改革初步取得了良好的教学效果,期望为绿色有机电化学理念的推广和绿色制药人才的培养提供一定的借鉴和参考。 相似文献
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有机电化学合成是将电化学知识运用于有机化学中的一种合成方法。此方法克服了一般有机合成中副反应多、分离提纯困难、产物纯度不高等缺点。最重要的是一些难于用一般有机方法合成的化合物,有可能用有机电化学方法成功地合成。目前,国外有的已经把它运用于生产中,但在我国这方面报导尚未见到。就有机电化学合成方法来说,可分为恒电流电解、恒电压电解和恒电位电解。恒电位电解的优点是能保证只有唯一确定的产物。本文所述的就是运用有机电化学合成中恒电位电解法,制备高效催化剂原料(双环 相似文献
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在有机电化学合成实验中,准确测量与控制电极电位是必要的。所用的测量装置主要由参比电极和电压表两部分组成。要求由参比电极、工作电极与电解液和电压表组成的测量电路,准确地指示出被研究的有机电活性物质在该溶液体系中发生电极反应时的电极电位。实验中,测量与控制电极电位的困难在于,参比电极相对于固体工作电极表面的位置并不是固定的,通常为 E+IR。在电解液阻抗大时或者 相似文献
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概述锂离子电池正极材料锂钴氧的制备方法,包括固相反应法、溶胶-凝胶法、水热合成法、沉淀-冷冻法、喷雾干燥法、熔盐合成法和微波合成法。介绍了国内外通过不同离子的掺杂改性和表面修饰对L iCoO2电化学性能的影响,并对其发展方向做出了展望。 相似文献
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Han-Seul Kim Hyungeun Seo Kyungbae Kim Jaegab Lee Jae-Hun Kim 《Ceramics International》2018,44(15):18222-18226
ZnO is an important functional material, and a nanotube structure is beneficial for various applications. Here, we report the facile synthesis and electrochemical properties of carbon-coated ZnO nanotube materials as Li rechargeable battery anodes. ZnO nanorod was first synthesized via a simple hydrothermal method. Subsequently, the material was annealed with a carbon precursor, forming free-standing, carbon-coated ZnO nanotubes. The carbon-coated nanotube structure is beneficial to alleviate volume changes of the ZnO active material during Li insertion and extraction processes as well as to improve the electrochemical reaction kinetics. Electrochemical test results demonstrate that the carbon-coated ZnO nanotube electrodes deliver improved the cycling performance compared with ZnO nanorod electrodes. Better rate performance than carbon-coated ZnO nanoparticle electrodes was also achieved. 相似文献
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There is renewed interest in the +6 oxidation state of iron, ferrate (VI) (FeVIO42−), because of its potential as a benign oxidant for organic synthesis, as a chemical in developing cleaner (“greener”) technology for remediation processes, and as an alternative for environment-friendly battery cathodes. This interest has led many researchers to focus their attention on the synthesis of ferrate(VI). Of the three synthesis methods, electrochemical, wet chemical and thermal, electrochemical synthesis has received the most attention due to its ease and the high purity of the product. Moreover, electrochemical processes use an electron as a so-called clean chemical, thus avoiding the use of any harmful chemicals to oxidize iron to the +6 oxidation state. This paper reviews the development of electrochemical methods to synthesize ferrate(VI). The approaches chosen by different laboratories to overcome some of the difficulties associated with the electrochemical synthesis of ferrate(VI) are summarized. Special attention is paid to parameters such as temperature, anolyte, and anode material composition. Spectroscopic work to understand the mechanism of ferrate(VI) synthesis is included. Recent advances in two new approaches, the use of an inert electrode and molten hydroxide salts, in the synthesis of ferrate(VI) are also reviewed. Progress made in the commercialization of ferrate(VI) continuous production is briefly discussed as well. 相似文献
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综述了氧化硝化法、氯化硝化法、铁氰化钾路线、电化学法等合成2,2–二硝基丙醇(DNPOH)的进展,并且比较了它们的特点,最后提出了洁净的电化学法是很有前途的绿色合成方法。另外,简述了DNPOH作为关键中间体在合成含能增塑剂和含能黏合剂中的应用情况。 相似文献
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L. Valade J-P. Legros D. De Montauzon P. Cassoux L. V. Interrante 《Israel journal of chemistry》1986,27(4):353-362
The use of various electrochemical techniques in the synthesis, characterization and applications of molecular conductors derived from transition metal complexes of the dmit2− ligand, is reviewed (H2dmit = 4,5-dimercapto-1,3-dithia-2-thione). Cyclic voltammetry can be used for the detection of the formation of conductive species derived from the concerned complexes. The use of the TTF[Ni(dmit)2]2 compound1 as electrode material and its electrochemical behaviour with various supporting electrolytes, is extensively studied. 相似文献
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介绍了直接电氧化法和间接电氧化法制取烟酸的原料及相应的电极反应,同时对直接电氧化法制取烟酸的电解槽、电极材料、离子交换膜及支持电解质等的研究进展进行了评述。直接电氧化法多采用Pt、PbO2和PbO2/Ti为阳极,Pb和Ni为阴极,离子交换膜为隔膜,电流效率可达70%。 相似文献