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Redox Reactions

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...

Redox Reactions

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...

Redox Equilibria: Overview

Redox Equilibria: Overview

A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...

Electrochemical Cells

Electrochemical Cells

Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not...

Voltaic/Galvanic Cells

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...

Redox Titration: Other Oxidizing and Reducing Agents

Redox Titration: Other Oxidizing and Reducing Agents

Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...

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Updated: Mar 17, 2026

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

带有反氧介质的电色动态窗户.

Aiyan Shi^1,2, Guojian Yang^2,3,4, Chenjie Mu^2,3

¹College of Energy Engineering, Zhejiang University, Hangzhou, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|March 16, 2026

概括

此摘要是机器生成的。

研究人员使用氧化还原介质 (RMs) 开发了新的电色 (EC) 动态窗户,以提高建筑物和车辆的能源效率. 这项创新提高了稳定性,并降低了运行电压,以获得更好的光热控制.

关键词:

电色玻璃窗的电色玻璃窗是什么意思无物质的平台是无物质的平台.运营稳定的运营稳定性氧化还原调解剂的介质.可逆的金属电极位置.

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Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties

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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

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科学领域:

材料科学材料科学材料科学
能源科学能源科学
电化学电化学电化学

背景情况:

建筑和运输部门是主要的能源消费者,需要在建筑包裹和车辆窗户中进行高效的光热调节.
电色 (EC) 动态窗户为节能和舒适提供了潜力,但传统方法面临着可扩展性和成本挑战.
可逆金属电位 (RME) 是一个有前途的EC技术,但对称的双电极架构由于寄生反应而遭受不稳定.

研究的目的:

为了克服基于RME的EC动态窗口中的操作不稳定性.
为了增强界面动力学和减少过量的潜力,以提高性能.
为下一代动态玻璃制造建立一个普遍适用的平台技术.

主要方法:

整合氧化还原媒介 (RMs),特别是聚3,4-乙烯二氧化硫):聚硫酸 (PEDOT:PSS),到基于Cu和Bi的RME水凝系统中.
采用材料无意识的方法来改进各种传统的EC系统,包括氧化和衍生物.
工程EC动态窗口与RMS增强接口动力学和降低操作电压.

主要成果:

从1.9V降低到1.2V的工作电压.
显著提高了长期工作稳定性 (18000秒与180秒相比).
在没有退化的情况下实现了6000个循环,保持了稳定的光学调制和改进的开关速度.

结论:

整合RMS提供了一个可行的策略,以克服基于RME的EC动态窗口中的不稳定性问题.
这种RM策略在各种EC系统中提高了性能,证明了它的普遍适用性.
开发的无材料平台技术使先进的动态玻璃解决方案的可扩展制造成为可能.