Decoding Electrocatalyst Degradation Using Time-Resolved Electrochemical Impedance Analysis.

ABSTRACT: Evaluating the long-term stability of electrocatalysts under operational conditions is critical for understanding performance degradation in fuel cells, electrolyzers, and metal-air batteries. Conventional electrochemical techniques, such as chronoamperometry and chronopotentiometry, often rely on simple current or overpotential versus time correlations, offering limited insight into the evolving structure-performance relationships. In this study, we introduce a time-resolved electrochemical impedance analysis (tr-EIA) protocol that enables the real-time tracking of key electrochemical parameters, including current/overpotential, electrochemical double-layer capacitance, charge transfer resistance, electrolyte resistance, and process relaxation times, all in a single experiment. By applyin

SUBMITTER: Zheng W 

PROVIDER: S-EPMC12728632 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature