Highly active and selective H2O2 electrosynthesis in O-rich ZIF-67 derived Co-N/O-C cathode for ofloxacin oxidation

Electrochemical production of hydrogen peroxide (H2O2) via 2-electron pathway is the most promising alternative to the anthraquinone process. However, designing and synthesizing electrocatalysts with high activity and high selectivity remains a challenge. Here, we evaluated a facile and efficient approach of improving the catalyst activity and selectivity by introducing O functional group into Co-N-C catalysts, which pyrolyzed at different temperatures. Our analyses showed that the catalyst activity and selectivity were related with the oxygen-containing functional groups and the pyrolysis temperature. H-cell test produced a H2O2 output of 2170 ppm within 6 h, which met the in-situ degradation of antibiotics (Ofloxacin), offering a reliable on-site environmental treatment option.