“Charging” the cigarette butt: heteroatomic porous carbon nanosheets with edge-induced topological defects for enhanced oxygen evolution performance

Ecologically Sustainable N-doped Graphene Nanosheets as High-Performance Electrodes for Zinc–Air Batteries and Zinc-Ion Supercapacitors

“…implied that the doping of Co and Se in N-doped carbon nanosheets displayed a promising trifunctional OER, ORR, and hydrogen production capability along with robust practical operational stability benefiting the presence of localized negative charge present at Se sites, abundant high oxidation state of Co . The synergy of Co and Fe doping in NS-doped carbon spheres and graphene is reported to achieve gas–liquid–solid triple-phase interface and accelerated OER/ORR kinetics. − Heteroatom (N, P, S, or B) doping in the carbon nanostructure is promising because of its metal-free structure, low-cost, environmentally sustainable nature, robust stability, and high activity. , Appropriate heteroatom doping can tune the electronic structures of active centers but achieving uniform doping is quite difficult . In addition, heteroatom doping can increase the wetting compatibility between electrolyte and electrode interfaces and improve the pseudocapacitance of nanocarbons. , However, the synthesis procedure suffers from a multistep, costly, and time-consuming pyrolysis process.…”