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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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Updated: Nov 28, 2025

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

Ultra-Thin SnS₂-Pt Nanocatalyst for Efficient Hydrogen Evolution Reaction.

Yanying Yu¹, Jie Xu¹, Jianwei Zhang¹

¹Center for Electron Microscopy, TUT-FEI Joint Laboratory, Tianjin Key Laboratory of Advanced Porous Functional Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.

Nanomaterials (Basel, Switzerland)

|December 1, 2020

Summary

This summary is machine-generated.

Ultra-thin tin disulfide (SnS2) combined with platinum (Pt) enhances the hydrogen evolution reaction (HER) catalysis. This novel material demonstrates improved stability and efficiency for HER applications.

Keywords:

Pt nanoclusters hydrogen evolution reaction synergistic effect ultra-thin SnS2 nanocatalyst

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Area of Science:

Materials Science
Catalysis
Electrochemistry

Background:

Transition-metal dichalcogenides (TMDs) are promising catalysts for hydrogen evolution reaction (HER).
Challenges remain in TMDs' stability and high over-potential for efficient HER.
Developing new catalysts with enhanced performance is crucial for hydrogen production.

Purpose of the Study:

To synthesize ultra-thin SnS2 nanocatalysts.
To improve the catalytic activity and stability of SnS2 for HER by incorporating platinum.
To investigate the synergistic effects between SnS2 and Pt for enhanced HER.

Main Methods:

Hydrothermal synthesis of ultra-thin SnS2 nanocatalysts.
Incorporation of a low load of platinum (0.5 wt%) to form SnS2-Pt-3 composite.
Electrochemical characterization of the catalyst for HER performance evaluation.

Main Results:

SnS2-Pt-3 exhibited a low overpotential of 210 mV at 10 mA cm-2 for HER.
The composite demonstrated a small Tafel slope of 126 mV dec-1 in 0.5 M H2SO4.
Enhanced stability and catalytic kinetics were observed due to synergistic effects.

Conclusions:

Ultra-thin SnS2-Pt-3 composite is an effective catalyst for efficient hydrogen evolution reaction.
The synergistic effect between SnS2 and Pt significantly reduces the reaction barrier.
This approach offers a new pathway for developing advanced TMDs-based electrocatalysts.