Ultrafine Mn3O4 nanoparticles supported on functionalized-graphite towards efficient photochemical and electrochemical water oxidation catalysis

Mn3O4 nanoparticles (∼3.2 nm) anchored on phenylsulfonic acid functionalized exhibit highly efficient water oxidation activity with TOF of 0.1 s−1, several orders of magnitude higher than most of manganese-based oxide water oxidation catalysts reported so far.294