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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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Related Experiment Video

Updated: Jan 5, 2026

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication

Published on: November 28, 2017

Partial Sulfurization of a 2D MOF Array for Highly Efficient Oxygen Evolution Reaction.

Pengchen He¹, Yabo Xie¹, Yibo Dou¹

¹Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering , Beijing University of Technology , Beijing 100124 , P. R. China.

ACS Applied Materials & Interfaces

|October 12, 2019

Summary

A new method creates a hierarchical nickel-based catalyst (Ni-BDC@NiS) for efficient oxygen evolution reactions (OER). This advanced material offers superior performance and stability for electrocatalysis.

Keywords:

electrocatalysis hierarchical structure metal−organic frameworks (MOFs)oxygen evolution reaction partial sulfurization

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Developing efficient electrocatalysts is crucial for energy conversion technologies.
Metal-organic frameworks (MOFs) offer tunable structures for catalytic applications.
Nickel-based materials are promising for oxygen evolution reactions (OER).

Purpose of the Study:

To develop a novel 2D Ni-BDC material and decorate it with nickel sulfide (NiS) nanoparticles.
To investigate the synergistic effects of NiS and Ni-BDC in an electrocatalyst.
To evaluate the electrocatalytic activity of the fabricated material for the oxygen evolution reaction (OER).

Main Methods:

In situ growth of 2D Ni₃(OH)₂(1,4-BDC)₂-(H₂O)₄ (Ni-BDC) nanosheets.
Partial sulfurization treatment to decorate Ni-BDC with nickel sulfide (NiS).
Electrochemical characterization of the Ni-BDC@NiS catalyst for OER performance.

Main Results:

The hierarchical Ni-BDC@NiS catalyst exhibited excellent activity for OER.
Achieved a current density of 20 mA cm^-2 at an overpotential of 330 mV.
Demonstrated a low Tafel slope of 62 mV dec^-1, outperforming existing Ni-based sulfide catalysts.
The hierarchical structure enhanced mass transport and structural stability.

Conclusions:

The synergistic combination of NiS and Ni-BDC significantly improved electron transfer and active species availability.
The developed strategy provides an efficient route for fabricating advanced MOF-based electrocatalysts.
This work offers a promising approach for designing high-performance catalysts for OER.