Why is there a plateau in electrochemical oxidation?
Best insight from top research papers
Electrochemical oxidation exhibits a plateau due to the formation of a chemically unstable oxide, which leads to the passivity of the material to further oxidation . The conventional electrochemical experiment is limited by the oxidation or reduction of the solvent or supporting electrolyte, making it impossible to study redox reactions of species with low electron affinities or high ionization potentials . However, by reducing the electrode dimensions to very small values, it is possible to study electrode reactions in highly resistive media, allowing for the oxidation of species that would not be possible with ordinary electrochemical methods . This reduction in electrode dimensions reduces the quantity of supporting electrolyte necessary to develop the electrical double layer, enabling the study of these reactions .
Answers from top 4 papers
More filters
| Papers (4) | Insight |
|---|---|
| The provided paper does not mention anything about a plateau in electrochemical oxidation. | |
| The provided paper does not mention anything about a plateau in electrochemical oxidation. | |
| The answer to the query is not present in the provided paper. The paper is about stabilizing and destabilizing liquid-metal streams via electrochemical oxidation, but it does not discuss the specific reasons for the plateau in electrochemical oxidation. | |
| The provided paper does not discuss electrochemical oxidation or the reasons for a plateau in electrochemical oxidation. |
Related Questions
How to determine maximal fat oxidation?5 answersMaximal fat oxidation (MFO) can be determined through various methods. One approach involves conducting incremental upper and lower body exercise tests to volitional exhaustion, recording expired gases at each stage to calculate fat oxidation rates, and identifying the peak fat oxidation value relative to peak oxygen uptake (%V˙O2peak). Another method proposes a new testing approach using blood lactate concentration (BLC) to predict MFO, Fatmax, and the cross-over point (COP) based on the interchange between lactate and relative rates of carbohydrate and fat utilization. Stoichiometric equations can also estimate MFO by analyzing oxygen uptake, carbon dioxide production, and urinary urea nitrogen excretion during graded exercise testing, although caution is advised for inter-study comparisons due to potential differences in results. Additionally, mass-specific MFO can be compared between one-legged and two-legged cycling to understand the impact of central limitations on exercise performance.
What are the mechanisms and kinetics of electrochemical oxidation in various electrode materials?4 answersThe mechanisms and kinetics of electrochemical oxidation in various electrode materials have been extensively studied. The oxidation mechanism of amines, amides, aniline derivatives, carbamates, and lactams has been investigated, both directly oxidized at different electrode surfaces and indirectly oxidized by a reversible redox molecule. The anodic half-reaction of water splitting, known as the oxygen evolution reaction (OER) or water oxidation, is a crucial step in hydrogen production. Recent research efforts have focused on developing efficient and low-cost electrode materials for electrochemical OER. Kinetic studies have shown that water oxidation proceeds through stepwise proton-coupled electron transfer (PCET) reactions, leading to the formation of MnIII–OOH2 species and subsequent release of O2. A proposed kinetic mechanism for electrochemical interactions involves the fast formation and recombination of electron donors and acceptors on electrode surfaces, facilitating the study of electrochemical systems with indefinable bulk.
What is the importance of oxygen evolution in electrochemistry?4 answersThe oxygen evolution reaction (OER) is of great importance in electrochemistry. It plays a crucial role in various energy storage and conversion devices such as water electrolyzers and metal-air batteries. The OER is responsible for supplying the protons and electrons needed to convert renewable electricity into chemical fuels. Developing efficient and durable electrocatalysts for the OER has been a major focus of research in applied electrochemistry. Transition metal compounds, particularly transition metal phosphides (TMPs) and chalcogenides (TMCs), have emerged as promising OER catalysts, showing superior performance compared to conventional oxide-based catalysts. Additionally, metal oxides have been explored as potential candidates for photoelectrochemical O2 evolution, as their deep valence bands consisting of mainly O2p orbitals make them suitable for this reaction. Understanding the complex electrochemical kinetics of the OER and designing improved electrocatalytic materials are essential for advancing the field of electrochemistry.
Why are the oxidation peaks broader than the reduction peaks in lithium ion battery?5 answersThe broader oxidation peaks compared to the reduction peaks in lithium-ion batteries can be attributed to several factors. One possible reason is the formation of a solid-electrolyte interphase (SEI) layer on the surface of the anode during the oxidation process. This SEI layer can hinder the diffusion of lithium ions, leading to a slower reaction rate and broader peaks. Additionally, the presence of side reactions, such as electrolyte decomposition or the formation of lithium dendrites, can contribute to the broadening of the oxidation peaks. Furthermore, the kinetics of the oxidation reaction may be slower compared to the reduction reaction, resulting in a longer time for the oxidation process to complete and broader peaks. Overall, these factors contribute to the broader oxidation peaks observed in lithium-ion batteries.
Is a sharp peak in a cyclic voltammogram better than a broad peak?5 answersA sharp peak in a cyclic voltammogram is not necessarily better than a broad peak. The shape and position of the peaks in a cyclic voltammogram provide information about the underlying interface energetics and reaction mechanisms. The peak shape can be influenced by factors such as the coverage-dependence of adsorbate dipoles and the interaction of isolated adsorbates with interfacial fields. On the other hand, the peak position can be affected by the potential drop in the double layer and the double layer capacitance. Therefore, the interpretation of the peaks in a cyclic voltammogram should consider both the peak shape and position in order to understand the electrochemical processes occurring at the interface.
What is the electrochemistry?2 answersElectrochemistry is a field that involves the study of electron transfer between chemical species and electrodes. It plays a crucial role in various applications such as renewable-energy storage, nanoparticle science, and microtechnology. In electrochemistry, electrons are used as reagents or electrochemically regenerated, allowing for the careful and economic use of limited resources. The interface between the electrode and solution is of fundamental importance, as it regulates the behavior of electrochemical systems and determines the charge distribution and orientation of reactants. Electrochemical processes are used in analytical measurements to determine the composition of a system and in the optimization of electrochemical systems and devices to enhance their efficiency and response. Electrochemistry is a key technology in manufacturing processes of microtechnology, enabling the production of microdevices with high precision and aspect ratio. Overall, electrochemistry is a multidisciplinary field that has applications in various industries and technologies.