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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: Sep 2, 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

Positively Charged Pt-Based Nanoreactor for Efficient and Stable Hydrogen Evolution.

Kun Feng¹, Jiabin Xu^1,2, Yufeng Chen¹

¹Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|August 9, 2022

Summary

This summary is machine-generated.

This study introduces a novel Fe-PtNiPO nanoreactor for efficient hydrogen evolution reaction (HER). The nanoreactor utilizes positively charged platinum (Pt) to achieve high performance and stability, paving the way for industrial applications.

Keywords:

X-ray absorption spectroscopy hydrogen evolution reaction nanoreactors positively charged Pt

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Last Updated: Sep 2, 2025

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

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Hydrogen Production and Utilization in a Membrane Reactor

Hydrogen Production and Utilization in a Membrane Reactor

Published on: March 10, 2023

Area of Science:

Electrochemistry
Materials Science
Nanotechnology

Background:

Positively charged platinum (Pt) is known to be active for the hydrogen evolution reaction (HER).
Designing efficient electrocatalysts for HER at high current densities remains a challenge.

Purpose of the Study:

To demonstrate the application of positively charged Pt in an Fe-PtNiPO nanoreactor for highly efficient and stable HER.
To investigate the charge transfer mechanisms and the role of different components within the nanoreactor.

Main Methods:

Synthesis of a Fe-PtNiPO nanoreactor.
Synchrotron radiation X-ray absorption spectroscopy to confirm the formation of positively charged Pt.
In situ experiments to study charge transfer dynamics.
Electrochemical measurements to evaluate HER performance.

Main Results:

The Fe-PtNiPO nanoreactor achieved a low overpotential of 19 mV for 10 mA cm⁻², with a high mass activity of 10.93 A mgPt⁻¹.
Demonstrated ultra-low overpotential of 193 mV at a high current density of 1000 mA cm⁻².
Exhibited excellent stability over 300 hours of operation.

Conclusions:

The developed Fe-PtNiPO nanoreactor effectively utilizes positively charged Pt for highly efficient and stable alkaline HER.
The synergistic effects of Ni-based materials and the porous Fe shell contribute to enhanced catalytic activity and material transport.
This catalyst shows potential for large-scale industrial applications in hydrogen production.