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Updated: Apr 27, 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

Observing Pt nanoparticle formation at the atomic level during polyol synthesis.

Jocenir Boita¹, Lucas Nicolao, Maria C M Alves

¹Laboratório de Espectroscopia de Elétrons (LEe-), Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves, 9500, Bairro Agronomia, CP 15051, CEP 91501-970, Porto Alegre, RS, Brazil. jonder@if.ufrgs.br.

Physical Chemistry Chemical Physics : PCCP

|July 17, 2014

Summary

This study synthesized stable platinum nanoparticles (Pt NPs) using affordable, low-toxicity chemicals. Real-time monitoring revealed a three-stage formation process, resulting in highly crystalline, monodisperse Pt NPs with long-term stability.

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Last Updated: Apr 27, 2026

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

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Area of Science:

Materials Science
Nanotechnology
Chemical Synthesis

Background:

Platinum nanoparticles (Pt NPs) are crucial in catalysis and electronics.
Developing cost-effective and environmentally friendly synthesis methods is essential.

Purpose of the Study:

To investigate the synthesis of Pt NPs using ascorbic acid, polyvinylpyrrolidone, and sodium citrate.
To monitor the real-time kinetics of Pt NP formation and stabilization.

Main Methods:

In situ dispersive X-ray absorption spectroscopy for real-time monitoring.
Transmission electron microscopy and X-ray diffraction for characterization.

Main Results:

Pt NP formation occurred in three stages: reduction-nucleation, Ostwald ripening, and stabilization.
Achieved monodisperse Pt NPs with an average size of 2.7 ± 0.5 nm.
Synthesized highly crystalline and stable Pt NPs with no significant aging over nine months.

Conclusions:

Low-cost, low-toxicity chemicals enable efficient Pt NP synthesis.
Real-time spectroscopy provides insights into NP formation kinetics.
The synthesized Pt NPs exhibit excellent stability for potential applications.