A novel iron (II) tetranitrophthalocyanine/graphene composite as the high-performance catalyst for the oxygen reduction reaction in an alkaline medium

Iron Phthalocyanine/Graphene Composites as Promising Electrocatalysts for the Oxygen Reduction Reaction

“…In the composites, the graphene substrate can significantly improve the electron transfer process and the dispersion of FePc, thereby resolving the serious problems of aggregation and low conductivity found in FePc-based catalysts [41]. Together with pristine FePc and graphene, chemically functionalized FePc [42,43] and nitrogen-doped (n-doped) graphene [44] have also been utilized for the preparation of composite catalysts, with the aim of achieving enhanced ORR performances. The resulting composite catalysts exhibit superior ORR performances, excellent long-term stability, and good tolerance to methanol crossover and CO 2 poisoning.…”

“…Generally, the peripheral substituents on the aromatic macrocycles of FePc can significantly tailor not only its physical and chemical properties, but also the electron density of the central iron atom [42]. These changes can also induce a strong influence on the ORR activity of FePc.…”

“…First, Yu et al reported the development of a composite ORR catalyst composed of iron tetranitrophthalocyanine (FeTNPc) and poly(sodium-p-styrenesulfonate)-modified reduced graphene oxide (PSS-rGO). The FeTNPc/PSS-rGO composite was prepared by a solvothermal-assisted π-π assembly approach ( Figure 4Aa) [42]. The detailed synthesis route followed three consecutive steps; the TeTNPc and PSS-rGO were well-dispersed in dimethylformamide solution using ultrasonication, then the mixture was transferred to a Teflon-lined autoclave and placed into a convection oven at 160 • C for 12 h. Once the reaction was completed, the composite catalyst was centrifuged and washed several times.…”

Fabrication of Holey Graphene: Catalytic Oxidation by Metalloporphyrin‐Based Covalent Organic Framework Immobilized on Highly Ordered Pyrolytic Graphite

“…[2c,8] Related holey graphene (i.e., holey reduced graphene oxide) has been prepared by enzymatic and photocatalytic oxidation. [1b,1d,9] Direct perforation of graphene precursors requires deposition on solid templates before patterning holes. [2a,9a] These preparation methods involve multiple oxidation and reduction steps, require high-cost nanolithography equipment, and are time-consuming.…”

“…This copy–print process eliminates the need of preparing graphene–template superlattices on a solid support, and ultimately allows for scalable production of patterned graphene. The metallated COF is immobilized onto the graphite surface and provides a polymeric network of metal–ligand catalyst [9d] , thereby maintaining the catalytic center and reactive site for oxidation at the interface between the catalyst and the substrate. Once the catalytic oxidation is complete, the COF layer is chemically removed and then the patterned graphite is exfoliated.…”