Be Aware of Transient Dissolution Processes in Co₃O₄ Acidic Oxygen Evolution Reaction Electrocatalysts

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

Recently, cobalt-based oxides have received considerable attention as an alternative to expensive and scarce iridium for catalyzing the oxygen evolution reaction (OER) under acidic conditions. Although reported materials demonstrate promising durability, they are not entirely intact, calling fundamental research efforts understand processes governing degradation of such catalysts. To this end, work studies dissolution mechanism a model Co3O4 porous catalyst different electrochemical conditions using online inductively coupled plasma mass spectrometry (online ICP-MS), identical location scanning transmission electron microscopy (IL-STEM), differential (DEMS). Despite high thermodynamics tendency reflected in Pourbaix diagram, it is shown that cobalt kinetics sluggish can be lowered further by modifying protocol. For latter, identified study, several (electro)chemical pathways lead must considered. Hence, uncovers transient character provides valuable insights help stability already published works facilitate knowledge-driven design novel, stable, abundant catalysts toward OER environment.

Language: Английский

Coupling spin selectivity into ferrimagnet for enhanced electrocatalysis

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 80, P. 435 - 439

Published: July 17, 2024

Language: Английский