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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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Updated: Feb 23, 2026

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

Efficient Catalytic Microreactors with Atomic-Layer-Deposited Platinum Nanoparticles on Oxide Support.

Ville Rontu¹, Anne Selent², Vladimir V Zhivonitko^2,3,4

¹Department of Chemistry and Materials Science, Aalto University, P.O. Box 16200, 00076, Aalto, Finland.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|September 14, 2017

Summary

This summary is machine-generated.

This study demonstrates the efficiency of microreactors for continuous-flow hydrogenation. Atomic layer deposition successfully functionalized microreactors with platinum catalysts, achieving 100% propene conversion at low temperatures.

Keywords:

atomic layer deposition flow chemistry hydrogenation nanoparticles remote detection nmr

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Area of Science:

Chemical Engineering
Materials Science
Catalysis

Background:

Microreactors offer advantages in chemical synthesis, including high surface-to-volume ratios and controlled flow dynamics.
Atomic layer deposition (ALD) is explored as a method for catalyst and support material integration within microreactor channels.
Continuous-flow hydrogenation is a key process in chemical manufacturing.

Purpose of the Study:

To demonstrate the suitability of atomic layer deposition for functionalizing microreactors with catalytic nanoparticles.
To evaluate the performance of microreactors in continuous-flow hydrogenation of propene.
To investigate the impact of catalyst characteristics and reaction conditions on conversion efficiency.

Main Methods:

Fabrication of silicon microreactors.
Application of TiO2 support and Pt nanoparticle catalysts using atomic layer deposition.
Continuous-flow hydrogenation of propene to propane.
Monitoring reaction yield and mass transport using microcoil NMR spectroscopy and NMR imaging.

Main Results:

Successful deposition of TiO2-supported Pt nanoparticles within microreactor channels via ALD.
Achieved 100% yield in propene hydrogenation to propane at 50°C.
Demonstrated high catalytic activity of Pt nanoparticles (several to tens of mmol s⁻¹ m⁻²).
Optimized performance with ~1 nm Pt nanoparticles and 3.2% surface coverage in 20 mm channels.

Conclusions:

Atomic layer deposition is an effective technique for preparing catalytic microreactors.
Microreactors show high efficiency for low-temperature continuous-flow hydrogenation.
This approach holds promise for efficient and scalable chemical synthesis.