CoN 1 O 2 Single‐Atom Catalyst for Efficient Peroxymonosulfate Activation and Selective Cobalt(IV)=O Generation

Abstract High‐valent metal‐oxo (HVMO) species are powerful non‐radical reactive species that enhance advanced oxidation processes (AOPs) due to their long half‐lives and high selectivity towards recalcitrant water pollutants with electron‐donating groups. However, high‐valent cobalt‐oxo (Co IV =O) generation is challenging in peroxymonosulfate (PMS)‐based AOPs because the high 3d‐orbital occupancy of cobalt would disfavor its binding with a terminal oxygen ligand. Herein, we propose a strategy to construct isolated Co sites with unique N 1 O 2 coordination on the Mn 3 O 4 surface. The asymmetric N 1 O 2 configuration is able to accept electrons from the Co 3d‐orbital, resulting in significant electronic…

• NN
  National Natural Science Foundation of China

  Awards: no. 21936003, no. 22106104, nos. 52070128; 21876108
• NK
  National Key Research and Development Program of China

  Award: 2022YFA1205602