π-Extended nonplanar cobalt porphyrins immobilized on MWCNTs as efficient electrocatalysts for selective oxygen reduction reaction.
Amir Sohel BulbulVikram RathourVellaichamy GanesanMuniappan SankarPublished in: Chemical communications (Cambridge, England) (2024)
Two π-extended cobalt porphyrins are synthesized and one of them is crystallographically characterized. The nanocomposites of nonplanar ( curved ) porphyrin immobilized multi-walled carbon nanotubes were thoroughly characterized spectroscopically and microscopically, showing ∼200 mV positive shift in the O 2 reduction peak potential in aqueous media and ∼100 mV shift in the onset potential of the O 2 reduction relative to the control meso -tetraphenylporphyrinatocobalt(II) nanocomposite. Both the π-extended cobalt porphyrin immobilized nanocomposites efficiently catalyze selective 4e - /4H + O 2 reduction under ambient conditions with excellent methanol tolerance and high stability due to effective π-π interactions, and could be an alternative for expensive Pt-based cathode materials in fuel cells.
Keyphrases
- reduced graphene oxide
- walled carbon nanotubes
- carbon nanotubes
- gold nanoparticles
- ionic liquid
- metal organic framework
- photodynamic therapy
- air pollution
- cell cycle arrest
- magnetic nanoparticles
- capillary electrophoresis
- electron transfer
- particulate matter
- cell death
- energy transfer
- cell proliferation
- oxidative stress
- climate change
- high resolution