AI Article Synopsis
- The study focused on creating platinum nanoparticles (Pt NPs) in ethylene glycol using safe, inexpensive chemicals like ascorbic acid and polyvinylpyrrolidone.
- Researchers tracked Pt atom changes with a specific spectroscopy method, discovering that the nanoparticle formation occurred in three stages over 3.5 hours, including initial burst formation and stable growth.
- The final Pt NPs had an average size of 2.7 nm, were highly crystalline, and remained stable without major changes for up to nine months.
Article Abstract
This study investigated the synthesis of platinum nanoparticles (Pt NPs) in ethylene glycol using low cost and low toxicity chemicals as reducing (ascorbic acid) and stabilizing agents (polyvinylpyrrolidone and sodium citrate). By monitoring the changes in the local chemical environment of the Pt atoms in real time by in situ dispersive X-ray absorption spectroscopy, it is observed that the NP formation kinetics involved three different stages within 3 h 30 min of the reaction: a reduction-nucleation burst, followed by diffusion-limited Ostwald ripening growth and subsequent stabilization of the NPs. The resulting Pt NPs were analyzed by transmission electron microscopy and X-ray diffraction, revealing a monodisperse average size distribution of 2.7 ± 0.5 nm, characterized by highly crystalline and stable Pt clusters, showing no significant aging for at least nine months.
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| http://dx.doi.org/10.1039/c4cp01925c | DOI Listing |
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