Air electrodes 1 Atoms 1 Batteries 1 Catalyst supports 1 Catalytic performance 1 Density functional theory 1 Density-functional-theory 1 Electrocatalysis 1 Electrocatalysts 1 Electrolytic reduction 1 Graphene 1 Hydrogen 1 Large-scales 1 Oxygen 1 Oxygen reduction reaction 1 Pt-based catalyst Sluggish kinetics 1 Supported metals 1 Transition metals 1 Via density 1 ]+ catalyst 1