Platinum Nanoparticle Impacts at a Liquid|Liquid Interface

Single nanoparticle (NP) electrochemistry detection at a micro liquid|liquid interface (LLI) is exploited using the catalyzed oxygen reduction reaction (ORR). In this way, current spikes reminiscent of nanoimpacts were recorded, which corresponded to electrocatalytic enhancement of the ORR by Pt NPs...

Full description

Saved in:
Bibliographic Details
Published in:Angewandte Chemie 2017-10, Vol.129 (43), p.13678-13682
Main Authors: Stockmann, T. Jane, Angelé, Léo, Brasiliense, Vitor, Combellas, Catherine, Kanoufi, Frédéric
Format: Article
Language:English
Subjects:
Bipolare Reaktionen
Chemistry
Electrochemistry
Nanoparticles
Nanopartikel
Oxygen reduction reactions
Platin
Platinum
Sauerstoffreduktion
Stoßprozesse
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Single nanoparticle (NP) electrochemistry detection at a micro liquid|liquid interface (LLI) is exploited using the catalyzed oxygen reduction reaction (ORR). In this way, current spikes reminiscent of nanoimpacts were recorded, which corresponded to electrocatalytic enhancement of the ORR by Pt NPs. The nature of the LLI allows exploration of new phenomena in single NP electrochemistry. The recorded impacts result from a bipolar reaction occurring at the Pt NP straddling the LLI. O2 reduction takes place in the aqueous phase, while ferrocene hydride (Fc‐H+; a complex generated upon facilitated interfacial proton transfer by Fc) is oxidized in the organic phase. Ultimately, the role of reactant partitioning, NP bouncing, or the ability of NPs to induce Marangoni effects, is demonstrated. Platin‐Nanopartikel (Pt‐NPs) wurden im Zuge der platinkatalysierten Sauerstoffreduktion anhand von Zufallsstößen an einer Flüssig‐flüssig‐Mikrogrenzfläche elektrochemisch detektiert. Diese Beobachtung zeigt, dass einzelne Metall‐NPs auch an weichen Grenzflächen nachgewiesen werden können. Außerdem gibt sie Einblicke in NP‐Wechselwirkungen und mechanistische/physikochemische Prozesse an Flüssig‐flüssig‐Grenzflächen.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201707589