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An Efficient Bio‐inspired Oxygen Reduction Reaction Catalyst: MnOx Nanosheets Incorporated Iron Phthalocyanine Functionalized Graphene.
- Source :
- Energy & Environmental Materials; Jul2021, Vol. 4 Issue 3, p474-480, 7p
- Publication Year :
- 2021
-
Abstract
- Oxygen reduction reaction (ORR) catalysts play a critical role in energy storage and conversion devices and have been attracted enormous interests, and however, it remains challenging to develop highly active cheap catalysts in a simple and green route. Inspired by the heme‐copper oxidases (HOCs), in which the ORR active center is originated from the incorporation of Fe‐N4 with copper atom, we here developed a fine manganese oxide nanosheets (MnOx NSs) integrated with iron phthalocyanine (FePc) anchored on highly conductive graphene (MnOx/FePc‐G) through a green route only involve ethanol as the reagent. The bio‐inspired catalyst MnOx/FePc‐G demonstrated high ORR activity with a half‐wave potential (E1/2) of 0.887 V, about 57 mV more positive than that of Pt/C. And the current density (j) at 0.9 V is about 1.9 mA cm−2, which is three times of Pt/C and FePc‐G. More importantly, the bio‐inspired systems show superior stability in comparison to commercial Pt/C, showing a potential of 0.863 V to deliver a j of 3 mA cm−2 after 18 000 s polarization, about 80 mV higher than that of 0.783 V for Pt/C. The high activity is contributed by the integration of the FePc and MnOx NSs that plays the role to assist the cleavage of the O2 bond. Our approach provides a new evidence to develop highly efficient ORR catalysts through imitate the naturally involved systems through a simple route. [ABSTRACT FROM AUTHOR]
- Subjects :
- OXYGEN reduction
ENERGY storage
PHTHALOCYANINES
Subjects
Details
- Language :
- English
- ISSN :
- 25750356
- Volume :
- 4
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Energy & Environmental Materials
- Publication Type :
- Academic Journal
- Accession number :
- 151960033
- Full Text :
- https://doi.org/10.1002/eem2.12134