共查询到20条相似文献,搜索用时 78 毫秒
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本文详细比较了激光光热偏转,激光热透镜和激光光热折射光谱法的基本原理,光学构型和分析化学特性。并讨论了激光光热光谱法的分析现状和应用潜力。 相似文献
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用横向光热偏转技术测量双硫腙固体试样的光谱特性及H2Dz的浓度与横向光热偏转辐度之间的关系,检测限可达ng量级,为固体不透明材料的微量特性分析提供了一个简便的方法。 相似文献
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电化学原位紫外可见反射光谱法 总被引:3,自引:0,他引:3
电化学原位(in-situ)紫外可见反射光谱法是七十年代发展起来的一种光谱电化学方法。它对在分水平上电极界面结构和表面氧化,钝化,吸附,化学修饰等电化学过程具有独特的优越性。本文对电化学原位紫外可见反射光谱技术及其在电化学中的应用和发展趋势作了简要的叙述。 相似文献
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四(对-硝基)苯基卟啉锰配合物的光谱电化学性质 总被引:7,自引:1,他引:6
应用循环伏安、现场紫外可见光谱和红外光谱电化学技术确认了四(对-硝基)苯基卟啉锰配合物产生不同氧化态锰卟啉的电位及其电子光谱和振动光谱特征,发现卟啉周环上硝基的还原发生在Mn2+还原之后,金属价态变化敏感带出现在1597、1523、1207、825和806cm-1附近。 相似文献
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Pikma Piret Ers Heigo Siinor Liis Zhao Jinfeng Oll Ove Romann Tavo Grozovski Vitali Siimenson Carolin Väärtnõu Mart Paalo Maarja Härmas Riinu Lust Karmen Thomberg Thomas Jänes Alar Nerut Jaak Jäger Rutha Valk Peeter Kivi Indrek Maide Martin Möller Priit Kanarbik Rait Nurk Gunnar Lust Enn 《Journal of Solid State Electrochemistry》2023,27(7):1547-1591
The electrochemistry nowadays has many faces and challenges. Although the focus has shifted from fundamental electrochemistry to applied electrochemistry, one needs to acknowledge that it is impossible to develop and design novel green energy transition devices without a comprehensive understanding of the electrochemical processes at the electrode and electrolyte interface that define the performance mechanisms. The review gives an overview of the systematic research in the field of electrochemistry in Estonia which reflects on the excellent collaboration between fundamental and applied electrochemistry.
相似文献13.
21世纪电化学的若干发展趋势 总被引:2,自引:0,他引:2
本文简要回顾 2 0世纪后五十年电化学在理论、实验技术、新现象发现和应用等领域的重要进展 ,提出了 2 1世纪前期电化学的若干发展趋势 ,强调应重视电化学新体系的研究 ,以迎接 2 1世纪能源、材料、生命、信息和环境对电化学技术的挑战 相似文献
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Herein we combined the use of self-assembled monolayer (SAM) modified electrodes and gold coated magnetic nanoparticles (Au@MNPs) to modulate faradaic electrochemistry when nanoparticles are absorbed on and removed from, a passivated electrode using an external magnetic field. Substantial faradaic electrochemistry of potassium ferricyanide in solution is first prevented by modifying gold electrodes with 11-mercaptoundecanoic acid to form a passivating SAM. Restoration of the faradaic electrochemistry is then achieved by introducing Au@MNPs which are brought to the surface using an external magnetic field. The faradaic electrochemistry can again be suppressed by removing Au@MNPs from the SAM using another external magnetic field. 相似文献
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García G Bruno MM Planes GA Rodriguez JL Barbero CA Pastor E 《Physical chemistry chemical physics : PCCP》2008,10(44):6677-6685
Probe beam deflection (PBD) techniques, both as cyclic voltadeflectometry (CVD) and chronodeflectometry (CD), were applied for the first time to the study of the electrochemistry of nanostructured Pt materials which are commonly used as electrocatalysts in fuel cells. The electrochemical surface reactions, including faradaic processes, double layer charging and specific anion adsorption were easily detected. Quantitative analysis of the chronodeflectometric data made possible to elucidate the dynamics of double layer charging in such materials and to determine the potential of zero charge (pzc) of the metal present either as a monolithic mesoporous material or as metal nanoparticles supported on carbon. The electro-oxidation of CO, adsorbed on nanostructured Pt, was also studied by CVD and CD being able to detect the formation of CO2 and H3O+ related with the nucleation and growth process which controls the rate of CO stripping. The interplay of Pt oxide formation and COad electrooxidation, both in potential and time, was detected indicating possible application of the technique to other electrocatalysts. 相似文献
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Ensemble averaging measurements obscure the link between the electrochemical performance and the specific properties of an individual because of the interplay of inhomogeneity and heterogeneity. Nanocollision electrochemistry has attracted increasing interest because of its extremely high sensitivity, revealing the intrinsic properties of individual entities that are masked in the traditional ensemble measurements. In this perspective review, we summarized the recent developments in nanocollision-based single entity electrochemistry and photoelectrochemistry, the combined nanocollision electrochemistry with the other complementary techniques, as well as accurate data process. In closing, future challenges, opportunities, and destinations related to nanocollison electrochemistry were discussed. 相似文献
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维生素B1对细胞色素C电化学反应的影响 总被引:5,自引:3,他引:5
本文探讨了细胞色素C在维生素B1修饰金电极上的电化学反应,结果表明维生素B1是细胞色素C电化学反应很好的促进剂而且它的促进作用与金电极表面维生素B1分子数量相关。 相似文献
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Gas bubble formation is a common phenomenon in numerous electrochemical processes, such as water splitting, chloralkaline process, and fuel cells. Many efforts have been made to understand the behaviors of microsized or larger gas bubbles in electrochemical systems in the past few decades. It was not until recent years that the electrochemistry of nanosized gas bubbles (nanobubbles) has begun receiving attention. In this short review, we summarize recent advances in the field of electrochemistry of nanobubbles, ranging from new fundamental understandings of nanobubble behaviors to the development of novel bubble-based applications inspired by the basic research of nanobubble electrochemistry. 相似文献
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酶直接电化学与第三代生物传感器 总被引:10,自引:0,他引:10
本文详细地评述并展望了酶直接电化学与第三代生物传感器这个领域已取得的成果,主要内容涉及生物电催化的三个发展阶段,实现酶与电极之间的直接电子转移方法和相应机理、以及第三代酶传感器的研制。 相似文献