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Related Concept Videos

Catalysis02:50

Catalysis

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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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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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Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

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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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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.
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Oxidation-Reduction Reactions03:11

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Oxidation–Reduction Reactions
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Phase I Oxidative Reactions: Overview01:19

Phase I Oxidative Reactions: Overview

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Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
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Updated: Jun 22, 2025

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
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Amorphous multimetal based catalyst for oxygen evolution reaction.

Zishuai Zhang1, Daniela Vieira1, Jake E Barralet1

  • 1Faculty of Medicine, McGill University, Montreal, Qc H3A 0C5 Canada.

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|June 28, 2024
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Summary
This summary is machine-generated.

A new multimetal catalyst (NiCoV) offers efficient, low-cost water splitting for sustainable hydrogen production. This oxygen evolution reaction (OER) electrode demonstrates remarkable stability and low overpotential, addressing key challenges in electrolyzer technology.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy

Background:

  • Efficient water splitting electrocatalysts are crucial for storing energy from intermittent sources like solar and wind.
  • Generating sustainable hydrogen via water electrolysis requires overcoming technical bottlenecks in catalyst performance and cost.

Purpose of the Study:

  • To develop a novel, low-cost, and highly efficient electrocatalyst for the oxygen evolution reaction (OER) in water splitting.
  • To investigate the performance and stability of a unique multimetal (NiCoV) catalyst prepared via a low-temperature auto-combustion process.

Main Methods:

  • A multimetal (NiCoV) catalyst was synthesized using a simple low-temperature auto-combustion method.
  • The catalyst was coated onto a stainless-steel support using a tribochemical particle blasting technique.
  • Electrochemical performance was evaluated, focusing on overpotential, Tafel slope, and long-term stability.

Main Results:

  • The resulting oxygen evolving electrocatalyst exhibited a low overpotential of 230 mV at 10 mA cm⁻² and a low Tafel slope of 40 mV dec⁻¹.
  • The catalyst demonstrated sustained performance and stability for 10 hours at a relevant current density without surface degradation.
  • The amorphous multimetal catalyst showed excellent adhesion and durability on the stainless-steel support.

Conclusions:

  • The developed NiCoV catalyst represents a significant advancement in OER catalysis for water splitting.
  • This catalyst effectively lowers a key technical barrier, paving the way for cost-effective and widespread adoption of electrolyzer technologies.
  • The findings contribute to the advancement of sustainable hydrogen production through efficient energy storage solutions.