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Heterogeneous Catalysis

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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Related Experiment Video

Updated: May 1, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Laser solid-phase synthesis of single-atom catalysts.

Yudong Peng¹, Jianyun Cao^1,2, Yang Sha¹

¹Department of Materials, School of Natural Sciences, The University of Manchester, Manchester, M13 9PL, UK.

Light, Science & Applications

|August 19, 2021

Summary

This summary is machine-generated.

A new laser-based method synthesizes platinum single-atom catalysts (SACs) on graphene. This facile technique offers high yields and excellent performance for the hydrogen evolution reaction, surpassing commercial catalysts.

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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
Catalysis
Nanotechnology

Background:

Single-atom catalysts (SACs) offer superior catalytic performance due to atomically dispersed active sites.
Developing efficient and scalable synthesis methods for SACs remains a significant challenge.

Purpose of the Study:

To develop a facile and high-yield laser-induced solid-phase strategy for synthesizing platinum single-atom catalysts (Pt SACs) on a graphene support.
To investigate the influence of laser parameters on the formation mechanism of Pt SACs.

Main Methods:

A laser-induced solid-phase strategy involving rapid laser scanning of a freeze-dried electrochemical graphene oxide (EGO) film loaded with chloroplatinic acid (H2PtCl6).
Simultaneous pyrolysis of H2PtCl6 into Pt SACs and reduction/graphitization of EGO into graphene using nanosecond pulsed IR and picosecond pulsed UV lasers.
Utilizing rapid freezing in liquid nitrogen and freeze-drying to achieve atomic dispersion of Pt.

Main Results:

Atomically dispersed Pt SACs were successfully synthesized on a graphene support.
The Pt SACs exhibited a low overpotential (-42.3 mV at -10 mA cm-2) for the hydrogen evolution reaction.
The synthesized SACs demonstrated a mass activity ten times higher than commercial Pt/C catalysts.

Conclusions:

The laser-induced solid-phase strategy provides a simple, fast, and scalable method for producing high-performance Pt SACs.
This approach is potentially versatile for the mass production of various SACs.
The study highlights the effectiveness of laser irradiation for simultaneous catalyst formation and support modification.