In situ chemical probing of the electrode-electrolyte interface by ToF-SIMS
A portable vacuum interface allowing direct probing of the electrode-electrolyte interface was developed. A classical electrochemical system consisting of gold working electrode, platinum counter electrode, platinum reference electrode, and potassium iodide electrolyte was used to demonstrate real-time observation of the gold iodide adlayer on the electrode and chemical species as a result of redox reactions using cyclic voltammetry (CV) and the time-of-flight secondary ion mass spectrometry (ToF-SIMS, a vacuum-based surface analytical technique) simultaneously. This microfluidic electrochemical probe provides a new way to investigate the surface region with adsorbed molecules and region of diffused layer with chemical speciation in liquids in situ by surface sensitive techniques.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1127291
- Report Number(s):
- PNNL-SA-97864; 47299; 47740; 42330
- Journal Information:
- Lab on a Chip, 14(5):855-859, Journal Name: Lab on a Chip, 14(5):855-859
- Country of Publication:
- United States
- Language:
- English
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