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Related Concept Videos

Reduction of Alkenes: Catalytic Hydrogenation02:13

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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.
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Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
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Updated: Nov 24, 2025

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
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Mitrofanovite, Layered Platinum Telluride, for Active Hydrogen Evolution.

Dongyeon Bae1,2, Karam Park3, Hagyeong Kwon1,2

  • 1Division of Chemical Engineering and Materials Science, ELTEC College of Engineering, Ewha Womans University, Seoul 03760, Republic of Korea.

ACS Applied Materials & Interfaces
|December 22, 2020
PubMed
Summary

Layered platinum tellurides (Pt3Te4) show excellent efficiency and stability for the hydrogen evolution reaction (HER). This discovery offers a promising pathway for developing cost-effective catalysts for industrial hydrogen production.

Keywords:
edges and defectselectrochemical depositionhydrogen evolution reactionmitrofavonite Pt3Te4platinum−tellurium compound

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Two-dimensional (2D) layered materials are ideal for hydrogen evolution reaction (HER) catalysis due to abundant active sites.
  • Developing stable and economical 2D catalysts for industrial hydrogen production remains a challenge.

Purpose of the Study:

  • To investigate layered platinum tellurides (Pt3Te4) as efficient and stable HER catalysts.
  • To explore the synthesis and performance of Pt3Te4 nanocrystals for hydrogen production.

Main Methods:

  • Synthesis of Pt3Te4 nanocrystals on a molybdenum ditelluride (MoTe2) template via an electrochemical method.
  • Characterization using X-ray diffraction and high-resolution transmission electron microscopy.
  • Theoretical calculations to understand hydrogen adsorption energy.

Main Results:

  • Pt3Te4 exhibits an overpotential of 39.6 mV and a Tafel slope of 32.7 mV/dec for HER.
  • Achieved high current density exceeding 7000 mA/cm2.
  • Layered structure with PtTe and PtTe2 monolayers and near-zero Gibbs free energy for hydrogen adsorption.

Conclusions:

  • Pt3Te4 is a highly efficient and stable catalyst for the hydrogen evolution reaction.
  • The unique layered structure and electronic properties contribute to excellent catalytic performance.
  • This material holds potential for large-scale, cost-effective hydrogen production.