Superior Oxygen Exchange Kinetics on Bi₂O₃-Based Mixed Conducting Composites.

ABSTRACT: The kinetics of oxygen exchange dictate the rate of redox reactions, which is crucial for electrochemical-based sustainable technologies. In this study, we use isotope exchange pulse responses to elucidate the oxygen exchange mechanism for (Bi_0.8Tm_0.2)₂O_3-δ (BTM)-(La_0.8Sr_0.2)_0.99MnO_3-δ (LSM) composites. With an optimized composition and microstructure, these composites can achieve polarization resistances below 0.01 Ω·cm² at 700 °C. Analysis of the oxygen exchange rate, , by splitting it into elementary processes using the serial two-step scheme, demonstrates that both the dissociative adsorption and incorporation of oxygen are accelerated in BTM-LSM compared to the parent phases. Dissociativ

SUBMITTER: Emhjellen LK 

PROVIDER: S-EPMC11950862 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature