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Imaging Dynamic Collision and Oxidation of Single Silver Nanoparticles at the Electrode/Solution Interface
- Source :
- Journal of the American Chemical Society. 139(35)
- Publication Year :
- 2017
-
Abstract
- The electrochemical interface is an ultrathin interfacial region between the electrode surface and the electrolyte solution and is often characterized by numerous dynamic processes, such as solvation and desolvation, heterogeneous electron transfer, molecular adsorption and desorption, diffusion, and surface rearrangement. Many of these processes are driven and modulated by the presence of a large interfacial potential gradient. The study and better understanding of the electrochemical interface is important for designing better electrochemical systems where their applications may include batteries, fuel cells, electrocatalytic water splitting, corrosion protection, and electroplating. This, however, has proved to be a challenging analytical task due to the ultracompact and dynamic evolving nature of the electrochemical interface. Here, we describe the use of an electrochemical nanocell to image the dynamic collision and oxidation process of single silver nanoparticles at the surface of a platinum nanoelectrode. A nanocell is prepared by depositing a platinum nanoparticle at the tip of a quartz nanopipette forming a bipolar nanoelectrode. The compact size of the nanocell confines the motion of the silver nanoparticle in a 1-D space. The highly dynamic process of nanoparticle collision and oxidation is imaged by single-particle fluorescence microscopy. Our results demonstrate that silver nanoparticle collision and oxidation is highly dynamic and likely controlled by a strong electrostatic effect at the electrode/solution interface. We believe that the use of a platinum nanocell and single molecule/nanoparticle fluorescence microscopy can be extended to other systems to yield highly dynamic information about the electrochemical interface.
- Subjects :
- Silver
Inorganic chemistry
Metal Nanoparticles
02 engineering and technology
Electrolyte
010402 general chemistry
Electrochemistry
01 natural sciences
Biochemistry
Catalysis
Silver nanoparticle
Corrosion
Colloid and Surface Chemistry
Desorption
Electroplating
Electrodes
Chemistry
General Chemistry
Electrochemical Techniques
Nanocell
021001 nanoscience & nanotechnology
0104 chemical sciences
Solutions
Chemical engineering
Microscopy, Fluorescence
Electrode
0210 nano-technology
Subjects
Details
- ISSN :
- 15205126
- Volume :
- 139
- Issue :
- 35
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi.dedup.....45f93eaf96397c5941e5f99344a3c473