Proposed strategy enhances stability of Ru─O sites in acidic conditions, suggesting improved catalytic performance.
Ruthenium (Ru)‐based catalysts hold great promise for acidic oxidation reactions but suffer from rapid deactivation due to over‐oxidation‐induced dissolution. Herein, a dynamic support repair strategy is proposed that stabilizes Ru─O sites by architecting oxygen migration pathways during electrochemical process. In this design, screened oxygen‐deficient manganese dioxide (MnO x ) serves as a dynamic oxygen buffer that not only accepts excessive oxygen from the electrochemical oxidation of Ru─O sites, but also undergoes rapid hydroxyl‐mediated chemical reduction to transfer oxygen away and regenerate oxygen vacancies, thereby establishing a dynamic migration pathway coupling electrochemical oxidation with chemical reduction. This system delivers exceptional stability, enabling 1,000 h of oxidation reaction without potential decay‒a 40‐fold improvement compared to RuO 2 without support. Stability mechanistic analysis reveals a vacancy‐guided oxygen migration pathway that prevent over‐oxidation of Ru─O sites by transiently transferring excessive oxygen. These findings redefine the stabilization strategy for Ru‐based oxidation catalysts under harsh electrochemical environments.
No takes yet. Share an insight, caveat, or question.
Sun et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: