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Fast and Controlled Decorating of Metallic Nanoparticles Using Wall‐jet Configuration
Author(s) -
Alencar Leticia M.,
Caneppele Gabriella L.,
Martins Cauê A.
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201600472
Subject(s) - electrode , amperometry , nanoparticle , materials science , jet (fluid) , metal , nanotechnology , chemical engineering , analytical chemistry (journal) , electrochemistry , chemistry , metallurgy , chromatography , physics , engineering , thermodynamics
A new method to decorate metallic nanoparticles (NPs) based on the wall‐jet configuration was developed. A homemade wall‐jet amperometric cell coupled to an electronic micropipette was used to decorate Pt NPs with Sb and Sn hydrodynamically through the injection of metallic precursor solutions onto an electrode modified with NPs under applied potential. The method allows the control of the coverage degree (θ) by changing easy handling parameters such as injection flow rate, injected volume and concentration of precursors. The decoration procedure is fast, reproducible, simple and economic, since it only uses a few microlitres of precursors to prepare each electrode composition. It is possible to prepare an average of 1000 electrodes using the same amount of precursors for each one prepared by a conventional method using a typical three‐electrode cell. Sb‐ and Sn‐decorated Pt/C NPs were first evaluated towards diluted glucose electrooxidation in buffer solution. These first insights reveal that the output current density increases with θ Sb and θ Sn ; Sb‐decorated Pt/C shows the greatest improvement.