Carbon-based Cathode Materials Doped with a New Borazine Compound for Electrochemical Oxygen Reduction

Abstract

A new compound, B,B′,B′′-tris(4-hydroxyphenyl)-N,N′,N′′-triphenylborazine (BZ) was prepared as a precursor for carbon-based oxygen reduction catalysts. The mixtures of BZ and phenolic resin were pyrolyzed under N2 at 1000 °C for 5 h and resulted in a carbonaceous material with high oxygen and boron contents. The oxygen reduction catalytic activity was much improved by the addition of this precursor. The improved catalytic activity is probably due to the oxygen-containing functionalities that are enriched in the presence of boron species.

Preparation of Pt-Ni Alloy Thin Films with Various Compositions by Sputtering and their Activity for Oxygen Reduction Reaction

“…However, it still does not surpass Pt [9]. Nabae et al applied the carbon alloy catalyst, which was prepared by pyrolysis of a polymer containing Fe, Co, and N, to the PEFC cathode [10][11][12]. Although these carbon alloys showed a comparable performance to Pt, their low stabilities under PEFC operating conditions were pointed out.…”

Synthesis and Reactions of Borazines

“…The substitution reaction of B-trichloro-N-triphenylborazine (112) with sodium fluoride in acetonitrile leads to the corresponding B-trifluoro-N-triphenylborazine (113) in 61% yield (Scheme 59). 100 Reaction of 114 with sodium iodide in diglyme gives the corresponding B-triiodo-N-tributylborazine (115) in 6% yield (Scheme 60).…”

“…For example, Nabae and co-workers prepared the borazine-based catalyst precursor 132b for the electrochemical reduction of oxygen. 113 This borazine was synthesized by the reaction of Btrichloro-N-triphenylborazine (112) with THP-protected phenol Grignard reagent 131 (Scheme 67). Borazine-based UV-emissive materials 134 and 82 for LED and light-emitting electrochemical cell (LEC) applications were prepared by Bonifazi and co-workers using a similar strategy (Scheme 67).…”

Synthesis of boron and nitrogen co-doped carbon nanofiber as efficient metal-free electrocatalyst for the VO 2+ /VO 2 + Redox Reaction

“…Therefore, the system energy storage capacity is determined by the concentrations of the reactants and the size of the storage tanks, while the system power is determined by the number of individual cells within a battery stack and their electrode areas. Commonly, the preferential electrodes of VRFB are carbon based materials due to their wide operating potential range, well stability in the strong acidic environment and availability in high surface area at reasonable cost [5][6][7]. However, these carbon materials were proved to show poor kinetic reversibility.…”