Abstract
Water oxidation is the key step for water splitting to produce hydrogen. Synthesis of earth-abundant, efficient, and robust water oxidation catalysts is vital for photocatalytic and electrocatalytic water splitting. Herein, inspired from natural oxygen evolving site Mn4CaO5 cluster, we fabricated very small Mn3O4 nanoparticles onto the surface of sulfonated-graphite (denoted as “Mn3O4@G-Ph-SN”) for photochemical and electrochemical water oxidation through a facile hydrothermal process. The supported Mn3O4 nanoparticles are homogeneously dispersed and the mean particle size is as small as 3.2 nm. The obtained hybrid exhibits efficient water oxidation activity with turnover frequency (TOF) of 0.1 s−1, several orders of magnitude higher than commercial manganese-based oxide water oxidation catalysts. In addition, Mn3O4@G-Ph-SN shows electrochemical water oxidation performance with an overpotential of 473 mV in 1.0 M KOH solution and with good stability.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
