Molecular iron phthalocyanine catalysts on morphology-engineered graphene towards the oxygen reduction reaction

Man Gao, Jingjing Liu, Gonglan Ye, Zhongkun Zhao, Jianbin Liu, Guanchao He, Zhichao Gong, Kang Huang, Hongtao Sun, Huilong Fei

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Molecular catalysts dispersed on nanocarbon substrates represent a unique class of single atom catalysts (SACs) for their well-defined active sites and tailorable structures, and are promising substitutes to precious metals for catalyzing the technologically important oxygen reduction reaction (ORR). Herein, we develop a highly active ORR catalyst consisting of iron phthalocyanine uniformly and densely dispersed on puff-like graphene (FePc/PG). With the unique crumpled and spheroid morphology, the graphene carrier possesses a large surface area and multiscale porosity, benefiting the high-density loading of FePc, exposure of the active sites and mass transfer efficiency during catalysis. When evaluated by a rotating disk electrode, FePc/PG presents a high half-wave potential of 0.909 V vs. the reversible hydrogen electrode. Furthermore, when employed as the gas diffusion electrode, FePc/PG exhibits outstanding high-rate and highpower capabilities at practically high current densities. This work provides efficient strategies to engineer the morphology of the nanocarbon substrates to design high-performance heterogeneous molecular catalysts toward applications in diverse energy conversion and storage technologies. [Figure not available: see fulltext.]

Original languageEnglish (US)
Pages (from-to)3865-3874
Number of pages10
JournalScience China Materials
Volume66
Issue number10
DOIs
StatePublished - Oct 2023
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science

Keywords

  • graphene
  • iron phthalocyanine
  • morphology engineering
  • oxygen reduction reaction
  • single atom catalyst

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