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Related Concept Videos

Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

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Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
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Anoxygenic Photosynthesis01:30

Anoxygenic Photosynthesis

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Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
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Oxidation Numbers03:14

Oxidation Numbers

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In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
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Structure and Nomenclature of Thiols and Sulfides02:17

Structure and Nomenclature of Thiols and Sulfides

5.1K
Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...
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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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Related Experiment Video

Updated: Sep 12, 2025

A Facile Synthetic Method to Obtain Bismuth Oxyiodide Microspheres Highly Functional for the Photocatalytic Processes of Water Depuration
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Ternary layered double hydroxide-derived sulfides for oxygen evolution reaction.

Xin Wang1, Tianpeng Liu1, Jie Li1

  • 1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.

Journal of Colloid and Interface Science
|August 7, 2025
PubMed
Summary

A novel vulcanized manganese-iron-nickel trimetallic catalyst (MnFeNiS-2h/NF) shows excellent performance for oxygen evolution reaction (OER) and overall water splitting (OWS). This non-noble metal catalyst offers a promising, durable, and cost-effective alternative for hydrogen energy generation.

Keywords:
DopingLayered double hydroxideOxygen evolution reactionSulfidation

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Conversion

Background:

  • Non-noble metal electrocatalysts are crucial for cost-effective hydrogen energy generation.
  • Layered double hydroxides (LDHs) can be optimized for enhanced electrocatalytic performance through structural modifications and integration with conductive substrates.
  • Developing efficient electrocatalysts for oxygen evolution reaction (OER) is vital for overall water splitting (OWS).

Purpose of the Study:

  • To design and fabricate a novel, non-noble metal-based electrocatalyst for efficient oxygen evolution reaction (OER) and overall water splitting (OWS).
  • To investigate the performance and durability of a vulcanized Mn-Fe-Ni trimetallic catalyst supported on nickel foam (MnFeNiS-2h/NF).
  • To provide a cost-effective and robust catalytic strategy for hydrogen energy production.

Main Methods:

  • Hydrothermal synthesis method was employed to prepare the vulcanized Mn-Fe-Ni trimetallic catalyst on nickel foam (MnFeNiS-2h/NF).
  • Electrochemical characterization techniques were used to evaluate the catalyst's performance in oxygen evolution reaction (OER) and overall water splitting (OWS) in an alkaline solution (1 M KOH).
  • Durability tests were conducted to assess the long-term stability of the catalyst.

Main Results:

  • The MnFeNiS-2h/NF catalyst exhibited a rough nanostructure and high conductivity, beneficial for OER.
  • Achieved low overpotentials for OER: 140 mV at 10 mA cm⁻² and 234 mV at 100 mA cm⁻², with a Tafel slope of 25.27 mV dec⁻¹.
  • In OWS, the catalyst achieved cell voltages of 1.48 V at 10 mA cm⁻² and 1.69 V at 100 mA cm⁻², outperforming commercial catalysts.
  • Demonstrated considerable long-term durability, indicating practical applicability.

Conclusions:

  • The vulcanized MnFeNiS-2h/NF catalyst presents a highly active and stable electrocatalyst for OER and OWS.
  • The synthesis strategy utilizing easily available raw materials offers a promising approach for developing advanced non-noble metal catalysts.
  • The catalyst's superior performance and durability highlight its potential for industrial applications in hydrogen energy generation.