An In-Depth Exploration of the Electrochemical Oxygen Reduction Reaction (ORR) Phenomenon on Carbon-Based Catalysts in Alkaline and Acidic Mediums

Detailed studies of the electrochemical oxygen reduction reaction (ORR) on catalyst materials are crucial to improving performance different energy conversion and storage systems (e.g., fuel cells batteries), as well numerous chemical synthesis processes. In effort reduce loading expensive platinum group metal (PGM)-based catalysts for ORR in systems, many carbon-based have already shown promising results investigations those progress. Most these show materials’ current density data obtained through rotating disk electrode (RDE), ring-disk (RRDE) experiments taking cyclic voltammograms (CV) or linear sweep (LSV) approaches. However, provided descriptions interpretations curves often ambiguous recondite which can lead an erroneous understanding phenomenon specific inaccurate characterization materials. this paper, we presented a study newly developed catalyst, nitrogen-doped graphene/metal-organic framework (N-G/MOF), RDE RRDE both alkaline acidic mediums, LSV approach. The functions considerations parts RDE/RRDE experiment such working electrode, reference counter electrolyte, overall process delineated serve guidelines new researchers field. Experimentally curves’ shapes their correlations with possible pathways within applied potential range discussed depth. We also demonstrated how presence hydrogen peroxide (H2O2), intermediate ORR, electrolyte concentration acid maneuver output compliance pathways.