Akademik Veri Yönetim Sistemi
Materials Chemistry and Physics, cilt.354, 2026 (SCI-Expanded, Scopus)
This study presents a systematic and controlled comparative investigation of newly developed MPc-carbon composite electrocatalysts for bifunctional ORR and OER and their application as air cathodes in Zinc-air batteries. Five mononuclear MPc complexes (CoPc 2 , Fe(OAc)Pc 3 , Mn(OAc)Pc 4 , NiPc 5 , and ZnPc 6 ) were combined with five structurally distinct carbon nanomaterials, namely vulcan XC-72, fullerene, graphene oxide, graphene, and timcal graphite & carbon super P, yielding a total of 25 well-defined catalyst systems. By maintaining identical catalyst loadings, electrode fabrication procedures, and electrochemical testing conditions, the individual effects of the metal center and carbon support were systematically assessed using cyclic and hydrodynamic voltammetry. Rather than representing a simple performance screening, this approach establishes a comparative framework that links intrinsic ORR/OER activity with practical Zinc-air battery performance. The results demonstrate that the redox-active metal center plays a decisive role in ORR/OER activity, while the nature of the carbon support significantly influences catalytic performance, with vulcan XC-72 and fullerene exhibiting superior behavior among the tested materials. Beyond half-cell measurements, selected MPc-carbon catalysts were further evaluated as air cathodes in Zinc-air batteries. Notably, Fe(OAc) Pc 3 /Fl/Nf delivered a high specific capacity of 804 mAh g−1 at 40 mA cm−2 and a maximum specific energy density of 816 Wh kg−1 at 10 mA cm−2, approaching the performance of a Pt-based catalyst in Zinc-air battery performance tests conducted in a commercial Zinc-air test cell for Fe(OAc) Pc 3 /Fl/Nf, Fe(OAc) Pc 3 /Vc/Nf and CoPc 2 /Vc/Nf catalysts. These results highlight the potential of MPc-carbon composites as cost-effective alternatives to noble-metal catalysts and provide practical design guidelines for selecting metal centers and carbon supports in MPc-based ORR/OER electrocatalysts and Zinc-air battery cathodes.