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Catalysis

Catalysis

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.

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...

Reduction of Alkenes: Catalytic Hydrogenation

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...

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Related Experiment Video

Updated: Jun 3, 2025

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

Published on: November 27, 2015

Tungsten Carbide/Tungsten Oxide Catalysts for Efficient Electrocatalytic Hydrogen Evolution.

Jian Ouyang¹, Yu Sun², Yiqiong Zhang³

¹Shenzhen Kohodo Hydrogen Energy Co., Ltd., Shenzhen 518109, China.

Molecules (Basel, Switzerland)

|January 11, 2025

Summary

Researchers developed a simple plasma method to create tungsten carbide/tungsten oxide nanosheets. This non-precious metal catalyst shows excellent performance for hydrogen evolution reactions in water electrolysis.

Keywords:

heterogeneous electrocatalysts hydrogen evolution reaction tungsten carbide tungsten oxide

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

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Last Updated: Jun 3, 2025

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

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Published on: November 27, 2015

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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

The hydrogen evolution reaction (HER) is crucial for efficient proton exchange membrane water electrolysis (PEMWE).
Platinum (Pt)-based catalysts are effective but costly for HER.
Tungsten carbide (W2C) presents a promising, cost-effective alternative to Pt catalysts due to its catalytic activity and durability.

Purpose of the Study:

To develop a scalable and facile method for preparing tungsten carbide (W2C) catalysts.
To investigate the catalytic performance of W2C-based materials for the hydrogen evolution reaction (HER).
To explore the potential of W2C as a non-precious metal alternative for industrial water electrolysis.

Main Methods:

Synthesized tungsten carbide species from a WO3 precursor using plasma treatment in a CH4 atmosphere.
Characterized the resulting tungsten carbide/tungsten oxide heterostructure nanosheets (WO3-x-850-P).
Evaluated the HER catalytic activity and stability of the synthesized materials in acidic electrolytes.

Main Results:

A facile protocol was established for producing tungsten carbide species via plasma treatment.
The synthesized WO3-x-850-P exhibited a heterogeneous structure of tungsten carbide/tungsten oxide nanosheets.
The material demonstrated exceptional HER catalytic activity and long-term stability in acidic media.

Conclusions:

The plasma-treated WO3-x-850-P serves as a high-performance, non-precious metal electrocatalyst for HER.
This method offers a facile and effective route for the industrial-scale production of advanced catalysts.
The findings support the use of tungsten carbide-based materials as sustainable alternatives in water electrolysis.