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Related Concept Videos

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

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Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
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Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

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In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
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Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

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Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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Electrochemistry: Overview01:04

Electrochemistry: Overview

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Electrochemistry is the branch of chemistry that studies the relationship between electrical quantities and chemical reactions, particularly oxidation and reduction. Oxidation is the loss of electrons from a substance, whereas reduction refers to the gain of electrons. A substance with a strong electron affinity is called an oxidizing agent (oxidant), and a reducing agent (reductant) is a species that donates electrons. Oxidation and reduction processes are pivotal to electrochemical reactions,...
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Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

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11.3K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
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Electrolysis03:00

Electrolysis

26.3K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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Related Experiment Video

Updated: Jun 24, 2025

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1
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Augmented Electrochemical Oxygen Evolution by d-p Orbital Electron Coupling.

Ning Sun1, Zhichuan Zheng1, Zhuangzhuang Lai2

  • 1State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China.

Advanced Materials (Deerfield Beach, Fla.)
|June 1, 2024
PubMed
Summary
This summary is machine-generated.

High-entropy metal phosphorus trisulfides offer a novel platform for oxygen evolution reaction electrocatalysis. This research demonstrates their exceptional activity and stability, paving the way for advanced energy applications.

Keywords:
density functional calculationd–p orbital hybridizationelectrochemical oxygen evolutionhigh‐entropy compoundsvan der Waals materials

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • High-entropy materials, including alloys, oxides, and hydroxides, show promise for electrocatalysis but suffer from activity deficiencies.
  • Tailoring structure-activity relationships in multicomponent systems is crucial for advancing electrocatalytic performance.

Purpose of the Study:

  • To develop a novel high-entropy material for efficient oxygen evolution reaction (OER) electrocatalysis.
  • To investigate the structure-activity relationship and performance enhancement mechanisms in high-entropy systems.

Main Methods:

  • Fabrication of a 2D high-entropy metal phosphorus trisulfide, specifically (MnFeCoNiZn)PS3.
  • Electrocatalytic performance testing for OER, including overpotential, Tafel slope, and long-term stability measurements.
  • Density functional theory (DFT) calculations to elucidate the electronic structure and catalytic mechanisms.

Main Results:

  • The (MnFeCoNiZn)PS3 material exhibited excellent OER activity with a low overpotential of 240 mV at 10 mA cm⁻² and a minimal Tafel slope of 32 mV dec⁻¹.
  • The catalyst demonstrated remarkable stability, with negligible degradation over 96 hours of operation under varying current densities.
  • DFT calculations revealed that d-p orbital hybridization and the contribution of active phosphorus centers enhance catalytic performance.

Conclusions:

  • Entropy-driven composition engineering in high-entropy anion-regulated transition metal compounds is an effective strategy for designing advanced OER electrocatalysts.
  • The developed 2D high-entropy metal phosphorus trisulfide provides a versatile platform for optimizing electron coordination environments and improving catalytic efficiency.
  • This work offers a promising approach for developing next-generation catalysts for energy-related applications.