Imaging Single Nanobubbles of H2 and O2 During the Overall Water Electrolysis with Single-Molecule Fluorescence Microscopy.
Anal Chem
; 92(5): 3682-3688, 2020 03 03.
Article
em En
| MEDLINE
| ID: mdl-32024359
ABSTRACT
In this work, we describe the preparation and use of a thin metal film modified Indium Tin Oxide (ITO) electrode as a highly conductive, transparent, and electrocatalytically active electrode material for studying nanobubbles generated at the electrode/solution interface. Hydrogen and oxygen nanobubbles were generated from water electrolysis on the surface of a Au/Pd alloy modified ITO electrode. The formation of single H2 and O2 nanobubbles was imaged in real time during a potential scan using single-molecule fluorescence microscopy. Our results show that while O2 nanobubbles can be detected at an early stage in the oxygen evolution reaction (OER), the formation of H2 nanobubbles requires a significant overpotential. Our study shows that thin-film-coated ITO electrodes are simple to make and can be useful electrode substrates for (single molecule) spectroelectrochemistry research.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Oxigênio
/
Água
/
Nanoestruturas
/
Eletrólise
/
Hidrogênio
/
Microscopia de Fluorescência
Idioma:
En
Revista:
Anal Chem
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Estados Unidos