Concurrent oxygen evolution reaction pathways revealed by high-speed compressive Raman imaging.

ABSTRACT: Transition metal oxides are state-of-the-art materials for catalysing the oxygen evolution reaction (OER), whose slow kinetics currently limit the efficiency of water electrolysis. However, microscale physicochemical heterogeneity between particles, dynamic reactions both in the bulk and at the surface, and an interplay between particle reactivity and electrolyte makes probing the OER challenging. Here, we overcome these limitations by applying state-of-the-art compressive Raman imaging to uncover concurrent bias-dependent pathways for the OER in a dense, crystalline electrocatalyst, α-Li₂IrO₃. By spatially and temporally tracking changes in stretching modes we follow catalytic activation and charge accumulation following ion exchange under various electrolytes and cy

SUBMITTER: Pandya R 

PROVIDER: S-EPMC11437135 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature