Electrocatalytic activity towards oxygen reduction reaction of laminar nanocomposite LaNb ₂ O ₇ /Co ^III TMPyP prepared via the exfoliation/restacking method

Abstract

The laminar lanthanum niobate KLaNb 2 O 7 with perovskite structure was intercalated with cationic cobalt (III) tetrakis-5, 10, 15, and 20-(N-methyl-4-pyridyl) porphyrin using the exfoliation/restacking method. The as-prepared material was characterised by several analytic methods including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and infrared microscopy. The exfoliation/restacking process was monitored and proved by the change of zeta potential, and the cyclic voltammetry measurements of LaNb 2 O 7 /Co III TMPyP nanocomposite demonstrated excellent electrocatalytic activity towards oxygen reduction reaction.

Functionalization of Graphene Oxide with Porphyrins: Synthetic Routes and Biological Applications

“…For example, Xu et al reported that a laminar lanthanum niobite (KLaNb 2 O 7 ) could be used to incorporate the CoTMPyP by exfoliation and restacking method. [227] As expected, the interlayer space of the composite increased. The exfoliated LaNb O 7 sheets maintained their layered structure after functionalization with porphyrin.…”