Journal Article 5S2CCF3T1Z 7440-57-5 Chlorophyllides Gold H2O2 treatment Hydrogels Lanthanoid Series Elements Photosensitizing Agents Porphyrins Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. conductive hydrogel crystal growth electrocatalysis facet engineering hydrogen peroxide production inner‐sphere electron transfer pathway metallic nanocomposites molybdenum phosphide multi‐level tuning strategy nanocomposite octahedron‐like cobalt structure phytochlorin self-organization of nanomaterials skin electronics soft bioelectronics strain-insensitive resistance stretchable conductor stretchable conductors