Species mass transfer governs the selectivity of gas diffusion electrodes toward H₂O₂ electrosynthesis.

ABSTRACT: The meticulous design of advanced electrocatalysts and their integration into gas diffusion electrode (GDE) architectures is emerging as a prominent research paradigm in the H₂O₂ electrosynthesis community. However, it remains perplexing that electrocatalysts and assembled GDE frequently exhibit substantial discrepancies in H₂O₂ selectivity during bulk electrolysis. Here, we elucidate the pivotal role of mass transfer behavior of key species (including reactants and products) beyond the intrinsic properties of the electrocatalyst in dictating electrode-scale H₂O₂ selectivity. This tendency becomes more pronounced in high reaction rate (current density) regimes where transport limitations are intensified. By utilizing diffusi

SUBMITTER: Cui L 

PROVIDER: S-EPMC11621356 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature