Effect of Furfuryl Alcohol on Metal Organic Framework-based Fe/N/C Electrocatalysts for Polymer Electrolyte Membrane Fuel Cells

Morozan, Adina; Sougrati, Moulay Tahar; Goellner, Vincent; Jones, Deborah J.; Stievano, Lorenzo; Jaouen, Frédéric

doi:10.1016/j.electacta.2013.12.022

Cited by 68 publications

(52 citation statements)

References 66 publications

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“…Addition of 20 wt% phen (NC Z8FA+phen ) also leads to a type I isotherm but now with a slight hysteresis. 47,51 For all M-N-C catalysts except W-N-C, the hysteresis indicates the presence of small mesopores (2-4 nm). Micropores are present in all samples as shown by the steep onset at low P/P 0 .…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis has previously been reported for Fe and Mo acetate precursors. 46,47 An optimized microporous Fe-N-C material derived from Z8 recently resulted in unprecedented oxygen reduction activity and mass-transport properties in a PEMFC cathode. 48 The efficient use of micropores in such materials is believed to stem from their short average depth and direct connection between micro-and macropores.…”

Section: Methodsmentioning

confidence: 99%

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Effect of the Transition Metal on Metal–Nitrogen–Carbon Catalysts for the Hydrogen Evolution Reaction

Morozan

Goellner

Nédellec

et al. 2015

J. Electrochem. Soc.

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The effect of the nature of the transition metal on the structure and activity for hydrogen evolution of Metal-N-C catalysts synthesized via the pyrolysis of metal salts and a Zn-based metal organic framework was investigated. It is found that W, Mo, Cu and Zn lead to amorphous carbons with high specific area while Cr, Mn, Fe, Co and Ni lead to more graphitic carbons with a lower specific area. Metal salts with a high redox potential are fully reduced during pyrolysis while others are only partially reduced. Electrochemical activity toward hydrogen evolution was investigated at pH 1 and pH 13. Hydrogen evolution on these Metal-N-C catalysts is generally more facile at pH 1 than at pH 13, paralleling the trends observed for noble metal surfaces. The Co-, Ni-and Fe-N-C catalysts are the most active at pH 13 while Co-N-C and Cr-N-C are the most active at pH 1. The activity of the latter catalysts stems from metallic cobalt particles encapsulated in carbon and from a chromium carbo-nitride phase, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of the Transition Metal on Metal–Nitrogen–Carbon Catalysts for the Hydrogen Evolution Reaction

Morozan

Goellner

Nédellec

et al. 2015

J. Electrochem. Soc.

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“…In approach (I) Zn-MOF was calcined in presence of FA followed by calcination with Fe-acetate while in approach (II) Zn-MOF was calcined individually, followed by another calcination with FA, Fe-acetate and phenanthroline. [64] The approach (I) primarily resulted in large number of highly active FeN 4 species while approach (II) resulted in a minor fraction of co-doping of heteroatoms (N, P, S etc.) can further enhance the activity since doped heteroatoms can provide different surface energies for the intermediates.…”

Section: Orr Catalysismentioning

confidence: 99%

Metal‐Organic Framework‐Based Nanomaterials for Electrocatalysis

Mahmood

Guo

Tabassum

et al. 2016

Advanced Energy Materials

571

335

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Metal‐organic frameworks (MOFs) with high surface area and tunable chemical structures have attracted tremendous attention. Recently, there has been increasing interest in deriving advanced materials from MOFs for electrochemical energy storage and conversion. This progress report highlights recent breakthroughs in electrocatalysis by using MOF‐based novel catalysts, such as in oxygen reduction and evolution, hydrogen evolution and carbon dioxide reduction. The advantages of preparing electrocatalysts from MOFs are introduced and discussed. Then, the development of MOF derived electrocatalysis‐active products, such as heteroatom‐doped carbon, metal oxide (MO), metal sulfide (MS), metal carbide (MC), metal phosphide (MP) and their hybrids with carbon, are summarized. The detailed functions of these materials in representative electrocatalysis systems are also reviewed. The demonstrated examples will provide understanding in preparing highly active and stable electrocatalysts. The progress report concludes with the future applications of MOF‐based materials in the field of electrocatalysis.

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“…It is therefore ideally suited to be used alone or in combination with XAS. [58][59][60] With EXAFS, the secondary peak observed at ca 2.1-2.3 Å in the Fourier-transform may be assigned to backscattering from either carbon atoms in the second coordination sphere of FeN x C y moieties, or from iron atoms in the first or second coordination sphere of metallic iron or iron carbide (Fig. 3a).…”

Section: 57mentioning

confidence: 99%

Degradation by Hydrogen Peroxide of Metal-Nitrogen-Carbon Catalysts for Oxygen Reduction

Goellner

Armel

Zitolo

et al. 2015

J. Electrochem. Soc.

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176

168

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Fe-N-C and Co-N-C materials are promising catalysts for reducing oxygen in fuel cells. The degradation of such catalysts induced by H 2 O 2 was investigated by contacting them ex situ with various amounts of H 2 O 2 . The degradation increased with increasing amounts of H 2 O 2 . The effect was most severe for Cr-N-C followed by Fe-N-C and last by Co-N-C. Treatment with H 2 O 2 leads to diminished oxygen reduction activity at high potential and/or reduced transport properties at high current density in fuel cell. From spectroscopic characterization, it was found that 66 and 80% of the CoN x C y and FeN x C y moieties present in pristine catalysts survived the extensive H 2 O 2 treatment, respectively. In parallel, the activity for oxygen reduction was divided by ca 6-10 for Fe-N-C and by ca 3 for Co-N-C. The results suggest that the main degradation mechanism in fuel cell for such catalysts is due to a chemical reaction with H 2 O 2 that is generated during operation. The super-proportional decrease of the oxygen reduction activity with loss of FeN x C y and CoN x C y moieties suggests either that only a small fraction of such moieties are initially located on the top surface, or that their turnover frequency for oxygen reduction was drastically reduced due to surface oxidation by H 2 O 2 .

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Effect of Furfuryl Alcohol on Metal Organic Framework-based Fe/N/C Electrocatalysts for Polymer Electrolyte Membrane Fuel Cells

Cited by 68 publications

References 66 publications

Effect of the Transition Metal on Metal–Nitrogen–Carbon Catalysts for the Hydrogen Evolution Reaction

Effect of the Transition Metal on Metal–Nitrogen–Carbon Catalysts for the Hydrogen Evolution Reaction

Metal‐Organic Framework‐Based Nanomaterials for Electrocatalysis

Degradation by Hydrogen Peroxide of Metal-Nitrogen-Carbon Catalysts for Oxygen Reduction

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