Synthesize and Characterization of 2‐Aminothiazole Monomer and Polymer‐based Bifunctional Fe/N/C Catalysts for Oxygen and Carbon Dioxide Reduction Reactions

2‐aminothiazole monomer (AT‐monomer) and polymer (AT‐polymer) are utilized as the nitrogen source to synthesize the Fe/N/C catalysts. The polymerization effect of nitrogen source for Fe/N/C catalysts on their bifunctional activity toward oxygen reduction reaction (ORR) and CO 2 reduction reaction (CO 2 RR) is investigated. Both AT‐monomer‐Fe/N/C and AT‐polymer‐Fe/N/C contain pyridine N (including Fe−N) and graphitic N in the structure, resulting in displaying bifunctional activity toward ORR and CO 2 RR. The 2‐aminothiazole polymer structure is important to produce graphene structured nanosheets with higher amount of defect sites and more pyridinic N (including Fe−N) and graphitic N in AT‐polymer‐Fe/N/C than those in AT‐monomer‐Fe/N/C synthesized from 2‐aminothiazole monomers. With the structure advantages, AT‐polymer‐Fe/N/C displays superior bifunctional catalytic performance. It has higher catalytic efficiency than commercial Pt/C for ORR and high CO selectivity (92%) with 4.2 mA cm –2 at overpotential of 0.47 V for CO 2 RR than that of AT‐monomer‐Fe/N/C.