Molecular architectures of iron complexes for oxygen reduction catalysis-Activity enhancement by hydroxide ions coupling.

ABSTRACT: Developing cost-effective and high-performance electrocatalysts for oxygen reduction reaction (ORR) is critical for clean energy generation. Here, we propose an approach to the synthesis of iron phthalocyanine nanotubes (FePc NTs) as a highly active and selective electrocatalyst for ORR. The performance is significantly superior to FePc in randomly aggregated and molecularly dispersed states, as well as the commercial Pt/C catalyst. When FePc NTs are anchored on graphene, the resulting architecture shifts the ORR potentials above the redox potentials of Fe^2+/3+ sites. This does not obey the redox-mediated mechanism operative on conventional FePc with a Fe²⁺-N moiety serving as the active sites. Pourbaix analysis shows that the redox of Fe^2+/3+ sites couples

SUBMITTER: Ei Phyu Win P 

PROVIDER: S-EPMC10945836 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature