Abstract

The development of green and scalable syntheses for the preparation of size- A nd shape-controlled metal nanocrystals is of high interest in many areas, including catalysis, electrocatalysis, nanomedicine, and electronics. In this work, a new synthetic approach based on the synergistic action of physical parameters and reagents produces size-tunable octahedral Pt nanocrystals, without the use of catalyst-poisoning reagents and/or difficult-to-remove coatings. The synthesis requires sodium citrate, ascorbic acid, and fine control of the reduction rate in aqueous environment. Pt octahedral nanocrystals with particle size as low as 7 nm and highly developed {111} facets have been achieved, as demonstrated by transmission electron microscopy, X-ray diffraction, and electrochemical methods. The absence of sticky molecules together with the high quality of the surface makes these nanocrystals ideal candidates in electrocatalysis. Notably, 7 nm bismuth-decorated octahedral nanocrystals exhibit superior performance for the electrooxidation of formic acid in terms of both specific and mass activities.

Autore Pugliese

• Giannini Cinzia , Sibillano Teresa

Tutti gli autori

• Moglianetti M.; Solla-Gullon J.; Donati P.; Pedone D.; Debellis D.; Sibillano T.; Brescia R.; Giannini C.; Montiel V.; Feliu J.M.; Pompa P.P.

Titolo volume/Rivista

ACS applied materials & interfaces

Anno di pubblicazione

2018

ISSN

1944-8244

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

Non Disponibile