Journal Article Research Support, Non-U.S. Gov't Review electrocatalysts 2D transition metal dichalcogenides CH index E1UOL152H7 Iron Mott transition N762921K75 Nitrogen Oxygen S88TT14065 SC index Soot carbon black catalyst reconstruction coarse-graining doping electronic structures fuel cells hydrogen evolution reaction internal cluster validation index iron metal-insulator transition neuromorphic computing optimal CG sites oxygen reduction reaction phase transition vacancy defects