Heterogeneous M-N-C Catalysts for Aerobic Oxidation Reactions: Lessons from Oxygen Reduction Electrocatalysts

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Nonprecious metal heterogeneous catalysts (M-N-Cs) are investigated as alternatives to platinum for oxygen reduction reactions (ORR).
• M-N-C catalysts also demonstrate efficacy in catalyzing the aerobic oxidation of organic molecules.
• Decades of research exist for M-N-Cs in ORR, but their aerobic oxidation applications are less explored.

Purpose of the Study:

• To highlight mechanistic similarities and differences between ORR and aerobic oxidation catalyzed by M-N-Cs.
• To survey the scope of aerobic oxidation reactions facilitated by M-N-C catalysts.
• To propose characterization methods for M-N-C aerobic oxidation catalysts by leveraging ORR research.

Main Methods:

• Literature review and comparative analysis of mechanistic studies.
• Survey of reported aerobic oxidation reactions catalyzed by M-N-Cs.
• Discussion of characterization techniques applicable to M-N-C catalysts.

Main Results:

• Identified shared and distinct mechanistic features between ORR and aerobic oxidation catalyzed by M-N-Cs.
• Compiled a survey of various organic aerobic oxidation reactions mediated by M-N-C catalysts.
• Highlighted the need for advanced characterization of M-N-C aerobic oxidation catalysts.

Conclusions:

• M-N-C catalysts exhibit versatile catalytic activity for both oxygen reduction and aerobic oxidation.
• Further investigation into the active sites and kinetics of M-N-C aerobic oxidation catalysts is crucial.
• Established ORR characterization tools can guide the development of M-N-C catalysts for aerobic oxidation.