Single-entity Electrocatalysis on Nanoparticle Ensembles Prepared by Template Synthesis

Tuesday, March 09, 2021: 8:50 AM - 9:10 AM

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Description

Within the electrochemistry field, there is growing interest in the synthesis of nanomaterials and the ability to investigate their properties at the single-entity level. Herein, we present a platform that combines template synthesis of Cu wire ensembles with droplet probe techniques to electochemically deposit and measure the electrocatalytic activity of Pt particles grown at the end of Cu wires. To form the particle ensembles, first, a gold coating was applied to one side of an etched ion track polyimide membrane to serve as an electrode for the later electrodeposition steps. Cu wire ensembles were prepared within the membrane pores through electrodeposition. Then, platinum particles of varying shape were electrodeposited on top of the wire ensembles with a droplet probe technique. The electrocatalytic activity at these particle and wire ensembles were assessed at the single-entity level with correlative scanning electrochemical cell microscopy (SECCM) and electron microscopy. The presented particle preparation strategy offers advantages, over more traditional strategies, for single-entity studies, such as, zero background current signal due to the insulating nature of the polymer membrane support and controlled particle dispersity by selecting a porous membrane of desired pore density.

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Additional Info

Keywords: Please select up to 4 keywords ONLY:
Materials Characterization,Microscopy,Nanoscience