Effects of the induced micro- and meso-porosity on the single site density and turn over frequency of Fe-N-C carbon electrodes for the oxygen reduction reaction

@article{Mazzucato2021EffectsOT,
  title={Effects of the induced micro- and meso-porosity on the single site density and turn over frequency of Fe-N-C carbon electrodes for the oxygen reduction reaction},
  author={Marco Mazzucato and Giorgia Daniel and Asad Mehmood and Tomasz Kosmala and Gaetano Granozzi and Anthony R. J. Kucernak and Christian Durante},
  journal={Applied Catalysis B-environmental},
  year={2021},
  volume={291},
  pages={120068}
}
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22 Citations

22 Citations

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Citation Type

Sulfur Doping versus Hierarchical Pore Structure: The Dominating Effect on the Fe–N–C Site Density, Activity, and Selectivity in Oxygen Reduction Reaction Electrocatalysis
TLDR
It was found that the Fe–N–C catalytic activity does not directly depend on sulfur content, but rather on the microporous surface and therefore any electronic effect appears not to be determinant as confirmed by X-ray photoemission spectroscopy.
A Mild CO2 Etching Method To Tailor the Pore Structure of Platinum-Free Oxygen Reduction Catalysts in Proton Exchange Membrane Fuel Cells.
TLDR
Through employing the Fe/N/C electrocatalysts as a model, the intrinsic impact of the pore structure on ORR activity was revealed and the CO2 etching method developed a high-quality electrocatalyst with polarization performance exceeding that of the commercial Pt/C catalyst in the fuel cell working voltage region (>0.65 V).
Self-assembly strategy for Co/N-doped meso/microporous carbon toward superior oxygen reduction catalysts
Carbon gel-derived Fe–N–C electrocatalysts for hydrogen-air polymer electrolyte fuel cells
Development of a highly active FeNC catalyst with the preferential formation of atomic iron sites for oxygen reduction in alkaline and acidic electrolytes.
A high-performance nitrogen-rich ZIF-8-derived Fe-NC electrocatalyst for the oxygen reduction reaction
Highly Graphitized Fe-N-C Electrocatalysts Prepared from Chitosan Hydrogel Frameworks
The development of platinum group metal-free (PGM-free) electrocatalysts derived from cheap and environmentally friendly biomasses for oxygen reduction reaction (ORR) is a topic of relevant interest,…
How determinant is the iron precursor ligand in Fe-N-C single-site formation and activity for oxygen reduction reaction?
Activation of bimetallic PtFe nanoparticles with zeolite-type cesium salts of vanadium-substituted polyoxometallates toward electroreduction of oxygen at low Pt loadings for fuel cells
The catalytic activity of commercial carbon-supported PtFe (PtFe/C) nanoparticles admixed with mesoporous polyoxometalate Cs 3 H 3 PMo 9 V 3 O 40 , (POM3-3–9), has been evaluated towards oxygen…
Engineering the Local Coordination Environment and Density of FeN4 Sites by Mn Cooperation for Electrocatalytic Oxygen Reduction.
Single atom sites (SAS) of FeN4 are clarified as one of the most active components for the oxygen reduction reaction (ORR). Effective strategies by engineering the local coordination environment and…
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References

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TLDR
It is reported that the activation process of carbon black and iron acetate heat-treated in NH(3) comprises three consecutive steps: incorporation of nitrogen atoms in the carbon, micropore formation through reaction between carbon and ammonia, and completion of active sites in the micropores by reaction of iron with ammonia.
Design Principle of Fe-N-C Electrocatalysts: How to Optimize Multimodal Porous Structures?
TLDR
The optimized catalyst exhibits one of the best ORR performance in alkaline medium with excellent long-term stability in anion exchange membrane fuel cell and accelerated durability test and establishes a basis for rationale design of the porous carbon structure for electrocatalyst applications.
Effect of iron-carbide formation on the number of active sites in Fe–N–C catalysts for the oxygen reduction reaction in acidic media
In this work Fe–N–C catalysts were prepared by the oxalate-supported pyrolysis of FeTMPPCl or H2TMPP either in the presence or absence of sulfur. The well-known enhancing effect of sulfur-addition on…
In situ electrochemical quantification of active sites in Fe–N/C non-precious metal catalysts
TLDR
A protocol is demonstrated that allows the quantification of active centres, which operate under acidic conditions, by means of nitrite adsorption followed by reductive stripping, and show direct correlation to the catalytic activity.
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Oxygen reduction on a high-surface area Pt/Vulcan carbon catalyst: a thin-film rotating ring-disk electrode study
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In this paper, we report a comprehensive investigation of Pt nanoparticles (NPs) deposition on nitrogen- and sulfur-doped or codoped mesoporous carbons (N-MC, S-MC, and N,S-MC) to develop active and…
Quantifying the density and utilization of active sites in non-precious metal oxygen electroreduction catalysts
TLDR
A successful quantification of bulk and surface-based active-site density and associated turn-over frequency values of mono- and bimetallic Fe/N-doped carbons using a combination of chemisorption, desorption and 57Fe Mössbauer spectroscopy techniques is reported.
A specific demetalation of Fe–N4 catalytic sites in the micropores of NC_Ar + NH3 is at the origin of the initial activity loss of the highly active Fe/N/C catalyst used for the reduction of oxygen in PEM fuel cells
In this study, we explored the behavior of NC_Ar + NH3, an initially highly active catalyst for oxygen electroreduction, in H2/air fuel cells from 0.8 to 0.2 V at 80 °C and 25 °C, in order to find…
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