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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...

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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

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Bimetallic Phosphides as High-Efficient Electrocatalysts for Hydrogen Generation.

Jiao Li¹, Haiyan Zheng², Chunyan Xu³

¹School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China.

Inorganic Chemistry

|January 14, 2021

Summary

Graphene-coated bimetallic phosphide nanoparticles (MoP/MoNiP@C) show excellent hydrogen evolution activity. This catalyst offers a stable and efficient solution for hydrogen production, driven by synergistic effects and enhanced active sites.

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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:

Bimetallic transition-metal phosphides are emerging as advanced catalysts for hydrogen evolution reactions.
Developing efficient and stable electrocatalysts is crucial for hydrogen production.

Purpose of the Study:

To synthesize and evaluate graphene-coated bimetallic phosphide nanoparticles (MoP/MoNiP@C) as hydrogen evolution catalysts.
To investigate the catalytic performance and stability of the synthesized material.

Main Methods:

One-step synthesis via high-temperature calcination and phosphating of a precursor derived from polyaniline, Ni2+ ions, and phosphomolybdic acid hydrate.
Electrochemical characterization including overpotential and Tafel slope measurements.
Stability testing in an acidic electrolyte.

Main Results:

MoP/MoNiP@C exhibited excellent hydrogen evolution activity with a low overpotential of 134 mV at 10 mA cm-2.
The catalyst demonstrated a small Tafel slope of 66 mV dec-1, indicating efficient kinetics.
Satisfactory stability was observed for MoP/MoNiP@C over 24 hours in an acidic electrolyte.

Conclusions:

The synergistic effect between MoP and MoNiP nanoparticles, coupled with graphene protection and porous structures, contributes to the outstanding catalytic performance.
The developed MoP/MoNiP@C material provides a promising foundation for the simple synthesis of high-performance bimetallic phosphide hydrogen evolution catalysts.