Doping (additives) 3 Nitrogen-doped Nitrogen 2 2D materials 1 2d material 1 Ambient pressures 1 Band discontinuities 1 Calcium chloride 1 Carbon 1 Electrocatalysts 1 Electrolytic reduction 1 First principle calculations 1 First-principle study 1 Fuel cells 1 Grafting (chemical) 1 Graphene 1 Heteroatoms 1 Heterojunctions 1 Hierarchical porous carbons 1 Hierarchical porous structures 1 Interfacial phenomena 1 Lateral heterostructure 1 Lateral superlattice 1 Lutetium compounds 1 Metabolism 1 Metal free 1 Metal free catalyst 1 Metal-free catalysts 1 Methanol 1 Methanol tolerance 1