Issue 23, 2024

π-Extended nonplanar cobalt porphyrins immobilized on MWCNTs as efficient electrocatalysts for selective oxygen reduction reaction

Abstract

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 O2 reduction peak potential in aqueous media and ∼100 mV shift in the onset potential of the O2 reduction relative to the control meso-tetraphenylporphyrinatocobalt(II) nanocomposite. Both the π-extended cobalt porphyrin immobilized nanocomposites efficiently catalyze selective 4e/4H+ O2 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.

Graphical abstract: π-Extended nonplanar cobalt porphyrins immobilized on MWCNTs as efficient electrocatalysts for selective oxygen reduction reaction

Supplementary files

Article information

Article type
Communication
Submitted
27 Pun 2023
Accepted
29 Phe 2024
First published
30 Phe 2024

Chem. Commun., 2024,60, 3146-3149

π-Extended nonplanar cobalt porphyrins immobilized on MWCNTs as efficient electrocatalysts for selective oxygen reduction reaction

A. S. Bulbul, V. Rathour, V. Ganesan and M. Sankar, Chem. Commun., 2024, 60, 3146 DOI: 10.1039/D3CC05803D

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