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Constructive Nano-Impacts - One by One Synthesis of Individual Nanoparticles.

08:00 EDT 11th April 2019 | BioPortfolio

Summary of "Constructive Nano-Impacts - One by One Synthesis of Individual Nanoparticles."

The impact of individual HAuCl4 nanoreactors is measured electrochemically, which enables operando insights and precise control over the modification of electrodes with functional nanoparticles of well-defined size. Uniformly sized micelles are loaded with a dissolved metal salt. Then these solution-phase precursor entities are reduced electrochemically - one by one - to form nanoparticles (NPs). The charge transferred during the reduction of each micelle is measured individually and allows operando sizing of each of the formed nanoparticles. Thus, particles of known number and sizes can be decorated homogenously even on non-planar electrodes. This is demonstrated for decoration of cylindrical carbon fibre electrodes with 25 ± 7 nm sized Au particles from HAuCl4-filled micelles. These Au NP-decorated electrodes show high catalyst performance for ORR (oxygen reduction reaction) already at low catalyst loadings. Hence, collisions of individual precursor-filled nano-containers are presented as a new route to nanoparticle modified electrodes with high catalyst utilization, homogeneous particle sizes and surface distribution.

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This article was published in the following journal.

Name: Angewandte Chemie (International ed. in English)
ISSN: 1521-3773
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