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Fe Vacancies Induced Surface FeO6 in Nanoarchitectures of N-Doped Graphene Protected β-FeOOH: Effective Active Sites for pH-Universal Electrocatalytic Oxygen Reduction.
- Source :
-
Advanced Functional Materials . 8/22/2018, Vol. 28 Issue 34, p1-N.PAG. 9p. - Publication Year :
- 2018
-
Abstract
- Developing high-active, good-stable, and cost-effective electrocatalyst for oxygen reduction reaction (ORR) in all-pH medium is highly desired for the application of various fuel cell systems. Here, a network architecture hybrid with porous nitrogen-doped graphene encapsulated β-FeOOH nanoparticals (β-FeOOH/PNGNs) as ORR electrocatalyst, which exhibits remarkable enhancement ORR performance in terms of activity and stability in pHuniversal medium is reported. Systematic characterization combining with X-ray absorption fine structure analysis and the first principles simulations reveal that the as-formed surface FeO6 active sites that induced by a mass of Fe vacancies in β-FeOOH/PNGNs can significantly lower the thermodynamic barrier of the total reaction, and hence contribute to a remarkable enhancement in ORR activity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *IRON oxides
*NITROGEN
*GRAPHENE
*PH effect
*OXYGEN reduction
*ELECTROCATALYSTS
Subjects
Details
- Language :
- English
- ISSN :
- 1616301X
- Volume :
- 28
- Issue :
- 34
- Database :
- Academic Search Index
- Journal :
- Advanced Functional Materials
- Publication Type :
- Academic Journal
- Accession number :
- 131502152
- Full Text :
- https://doi.org/10.1002/adfm.201803330