Journal
NANOSCALE ADVANCES
Volume 4, Issue 9, Pages 2171-2179Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2na00095d
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Funding
- Natural Science Foundation of Beijing Municipality [2192010, 2182012]
- National Natural Science Foundation of China [11179033]
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In this study, a series of Fe/N/C catalysts with different proportions and pyrolysis temperatures were prepared by co-pyrolysis of melamine with a gamma-cyclodextrin metal-organic framework (gamma-CD-MOF) containing iron(ii) phthalocyanine (FePc). It was found that gamma-CD-MOF effectively prevented the agglomeration of Fe atoms and obtained catalysts with a three-dimensional porous and internal cavity structure. The obtained FePc@CD/M (1 : 20)-1000 catalyst exhibited superior electrocatalytic performance and methanol tolerance.
Here, a series of Fe/N/C catalysts with different proportions and pyrolysis temperatures are prepared by co-pyrolysis of melamine with a gamma-cyclodextrin metal-organic framework (gamma-CD-MOF) containing iron(ii) phthalocyanine (FePc). Due to the restriction effect of the host and guest at the molecular level, gamma-CD-MOF can effectively avoid the pi-pi stacking of FePc and restrain the agglomeration of Fe atoms during pyrolysis. The phases and structures of the catalysts are characterized, which proves that the obtained catalyst has a three-dimensional porous and internal cavity structure with abundant surface area (1055.317 m(2) g(-1)) and Fe is atomically dispersed in nitrogen-doped carbon. The onset potential (0.988 V vs. RHE) and half-wave potential (0.846 V vs. RHE) of FePc@CD/M (1 : 20)-1000 are superior to those of a commercial 20% Pt/C catalyst. FePc@CD/M (1 : 20)-1000 also exhibits an approximately four-electron (3.84) transfer process, good stability and excellent methanol tolerance.
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