Journal Article Review phase engineering of nanomaterials CO2 reduction CO2 reduction reaction Cr2S3 active materials anion exchange membrane fuel cells bimetallic nanostructures carbon dioxide electroreduction catalysts cathode‐electrolyte interface crystal phase control decomposed sulfur ehanced capacity electrocatalysis electrolyte fuel cell electrocatalysts glycerol oxidation reaction heterophase high energy ball milling high‐voltage LiCoO2 hollow nanomaterials hydrogen oxidation reactions in situ polymerization in-situ FTIR intermetallic nanomaterials lithium‐ion batteries lithium‐ion battery lithium‐ion solvation structure low‐dimensional metal nanomaterials