Gas-Liquid-Solid Three-Phase Boundary in Scanning Electrochemical Cell Microscopy.

ABSTRACT: The gas-liquid-solid interface plays a crucial role in various electrochemical energy conversion devices, including fuel cells and electrolyzers. Understanding the effect of gas transfer on the electrochemistry at this three-phase interface is a grand challenge. Scanning electrochemical cell microscopy (SECCM) is an emerging technique for mapping the heterogeneity in electrochemical activity; it also inherently features a three-phase boundary at the nanodroplet cell. Herein, we quantitatively analyze the role of the three-phase boundary in SECCM involving gas via finite element simulation. Oxygen reduction reaction is used as an example for reaction with a gas reactant, which shows that interfacial gas transfer can enhance the overall mass transport of reactant, allowing measuring current

SUBMITTER: Ryu CH 

PROVIDER: S-EPMC11659987 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature