Typical ORR polarization curve.

Engineering Fe–Fe3C@Fe–N–C Active Sites and Hybrid Structures from Dual Metal–Organic Frameworks for Oxygen Reduction Reaction in H2–O2 Fuel Cell and Li–O2 Battery - Wang - 2019 - Advanced Functional Materials - Wiley

Typical ORR polarization curve showing the definitions of the onset

Intrinsic kinetic equation for oxygen reduction reaction in acidic media: the double Tafel slope and fuel cell applications - Faraday Discussions (RSC Publishing) DOI:10.1039/B802218F

A quick guide to the assessment of key electrochemical performance indicators for the oxygen reduction reaction: A comprehensive review - ScienceDirect

Efficient cathodes for quasi-solid-state aluminum-air batteries

a HOR polarization curve (the H 2 -saturated solution) and b ORR

Intrinsic kinetic equation for oxygen reduction reaction in acidic media: the double Tafel slope and fuel cell applications - Faraday Discussions (RSC Publishing) DOI:10.1039/B802218F

Typical ORR polarization curve. Reprinted with permission from [39].

Recent developments in manganese oxide based nanomaterials with oxygen reduction reaction functionalities for energy conversion and storage applications: A review - ScienceDirect

FePt and CoPt Nanowires as Efficient Catalysts for the Oxygen Reduction Reaction - Guo - 2013 - Angewandte Chemie International Edition - Wiley Online Library