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Opto‐electrochemical In Situ Monitoring of the Cathodic Formation of Single Cobalt Nanoparticles
Author(s) -
Brasiliense Vitor,
Clausmeyer Jan,
Dauphin Alice L.,
Noël JeanMarc,
Berto Pascal,
Tessier Gilles,
Schuhmann Wolfgang,
Kanoufi Fréderic
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201704394
Subject(s) - electrochemistry , nanoparticle , particle (ecology) , materials science , electrocatalyst , cobalt , nanotechnology , micrometer , in situ , chemistry , optics , electrode , physics , metallurgy , oceanography , organic chemistry , geology
Single‐particle electrochemistry at a nanoelectrode is explored by dark‐field optical microscopy. The analysis of the scattered light allows in situ dynamic monitoring of the electrodeposition of single cobalt nanoparticles down to a radius of 65 nm. Larger sub‐micrometer particles are directly sized optically by super‐localization of the edges and the scattered light contains complementary information concerning the particle redox chemistry. This opto‐electrochemical approach is used to derive mechanistic insights about electrocatalysis that are not accessible from single‐particle electrochemistry.