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Electrosynthesis of palladium nanocatalysts using single droplet reactors and catalytic activity for formic acid oxidation

Title
Electrosynthesis of palladium nanocatalysts using single droplet reactors and catalytic activity for formic acid oxidation
Authors
Nguyen T.H.T.Lee M.W.Hong S.Ahn H.S.Kim B.-K.
Ewha Authors
김병권
SCOPUS Author ID
김병권scopus
Issue Date
2022
Journal Title
Electrochimica Acta
ISSN
0013-4686JCR Link
Citation
Electrochimica Acta vol. 401
Keywords
Emulsion droplet stochastic collisionEmulsion nanodroplet-mediated electrodepositionFormic acid oxidationPalladium nanocatalystSingle entity electrochemistry
Publisher
Elsevier Ltd
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The synthesis of nanosized palladium (Pd) catalyst from a Pd2+ emulsion is performed using the emulsion nanodroplet-mediated electrodeposition method. In this method, aqueous emulsion droplets act as tiny reactors for the inner precursor (e.g., Pd2+) to reduce and generate the corresponding metal products while they are discretely colliding on the working ultramicroelectrode surface, which is biased at a suitable constant potential. The utilized volume of each reactor (with a given concentration of the Pd2+ precursor) and the monitored total number of deposition (i.e., droplet collision) events, being the critical factors, can facilitate the controllable (or quantifiable) synthesis of Pd nanocatalysts where the amount of Pd per deposition event and the generated product amount are determinable. In this research, individual Pd nanocatalysts nucleate from droplet collisions and become uniformly distributed on the substrate surface. The electrocatalytic activities of the synthesized Pd nanocatalysts for formic acid electrooxidation are higher than ca. 10 A mg(Pd)−1. © 2021 Elsevier Ltd
DOI
10.1016/j.electacta.2021.139446
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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