Design and synthesis of Co^IIHMTAA-14/16 macrocycles and their nano-composites for oxygen reduction electrocatalysis.

ABSTRACT: The major concerns in the design of macrocycle based-ORR catalysts are: (i) understanding the macrocyclic, π-conjugation, central metal and substituent effects on ORR electrocatalysis; and (ii) the use of macrocycles on the electrode surface for the retention of ORR activity because of their poor stability. In this work, we demonstrated the aromaticity/π-electron conjugation effect on ORR activity by using the same macrocycles [HMTAA-14 and 16 (hexamethyltetraaza [14] and [16] annulenes)] with a difference in their macrocyclic cavity/π-electron conjugation. The macrocycles Co^IIHMTAA-14 and Co^IIHMTAA-16 and their nanocomposites with highly conductive carbon black were prepared by a microwave-assisted method and characterized by using multiple spectroscopy techniques. C

SUBMITTER: Kumar A 

PROVIDER: S-EPMC9063917 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature