关于MnO对电化学脱离离的离子选择性行为的综合研究
Yi-Heng Tu1, Hung-Yi Huang1, Yu-Hsiang Yang1
1Laboratory of Electrochemistry and Advanced Materials Department of Chemical Engineering, National Tsing Hua University Hsin-Chu 30013, Taiwan.
ACS applied materials & interfaces
|September 29, 2023
概括
氧化在电化学脱离中表现出选择性离子捕获,优先考虑较小的水合半径和更高的电荷密度. 然而,氨离子可以降低性能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 氧化是电池,超级电容器和电化学脱离离 (ECDI) 中的关键材料.
- 了解其离子选择性行为对于优化ECDI系统至关重要.
- 目前关于氧化的特定离子相互作用的知识缺口存在.
研究的目的:
- 为了全面研究氧化的离子选择性行为.
- 阐明ECDI中控制离子捕获的机制.
- 扩大氧化在能源和环境解决方案中的应用.
主要方法:
- 使用微流体细胞进行受控实验.
- 使用电化学石英晶体微平衡 (EQCM) 分析进行实时监测.
- 分析了依赖时间的多机制离子选择性行为.
主要成果:
- 离子选择性由相同值的离子的水合半径控制,偏好较小的半径.
- 对不同价值的离子来说,电荷密度变得至关重要,有利于双价值离子.
- 发现氨离子诱导氧化溶解,影响稳定性.
- 建立了一个离子选择性序列:Ca2+ > Mg2+ > K+ > NH4+ > Na+ > Li+.
结论:
- 氧化显示基于水合半径和电荷密度的调节性离子选择性.
- 该研究提供了一种使用EQCM评估离子选择性的新方法.
- 由于潜在的材料降解,氨离子的存在需要仔细考虑.
更多相关视频
08:03Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research
Published on: April 18, 2013
17.3K
08:06Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
Published on: February 23, 2017
8.5K
相关概念视频
Ion-Exchange Chromatography
573
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
573
Ion Exchange
617
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
617
Electrodeposition
663
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
663
Potentiometry: Membrane Electrodes
623
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
623
Precipitation of Ions
28.0K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
28.0K
Electrogravimetric Analysis: Overview
262
Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
To test the completeness of the...
262
