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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.

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Related Experiment Video

Updated: May 29, 2025

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

Diffusion-programmed catalysis in nanoporous material.

Suvendu Panda¹, Tanmoy Maity^1,2, Susmita Sarkar¹

¹Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad, 500046, Telangana, India.

Nature Communications

|February 3, 2025

Summary

This summary is machine-generated.

Harnessing reactant diffusion length in porous catalysts significantly enhances reaction rates and selectivity. This novel approach using metal-organic frameworks in microfluidic reactors overcomes limitations of traditional catalysts.

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Last Updated: May 29, 2025

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

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Published on: September 2, 2016

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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Published on: December 6, 2021

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Published on: April 10, 2019

Area of Science:

Heterogeneous Catalysis
Materials Science
Chemical Engineering

Background:

Reactant diffusion is crucial for heterogeneous catalysis, affecting reaction rates and selectivity.
Porous catalysts like metal-organic frameworks (MOFs) struggle to control diffusion rates.
Current methods often rely on catalyst chemical functionality, limiting performance.

Purpose of the Study:

To develop a strategy for controlling reactant diffusion length to improve catalyst performance.
To augment reaction kinetics and enhance geometric selectivity in porous catalysts.
To overcome limitations of conventional nano/microcrystal catalysts.

Main Methods:

Utilized a thin film of a porous metal-organic framework catalyst.
Employed a cross-flow microfluidic catalytic reactor.
Programmed reactant diffusion within the catalyst film.

Main Results:

Achieved over a 1000-fold increase in turnover frequency.
Enhanced geometric selectivity by approximately 2-fold compared to bulk catalysts.
Demonstrated concurrent amplification of reaction rate and selectivity.

Conclusions:

Diffusion-programmed catalysis offers a robust solution for enhancing porous catalyst performance.
This strategy overcomes diffusion constraints inherent in bulk nano/microcrystals.
Represents an advancement in designing porous catalyst-driven organic reactions.