MOF derived Mesoporous Nitrogen doped Carbons with high Activity towards Oxygen Reduction
In order to obtain Platinum-free catalysts for the Oxygen Reduction Reaction (ORR) in Fuel Cells, Nitrogen doped mesoporous carbons were prepared from pyrolysis of three Cobalt metal organic frameworks (MOFs), one linear coordination polymer and one complex. Electron micrographs revealed the presenc...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v251_n_p638_DiazDuran http://hdl.handle.net/20.500.12110/paper_00134686_v251_n_p638_DiazDuran |
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paper:paper_00134686_v251_n_p638_DiazDuran2023-06-08T14:35:48Z MOF derived Mesoporous Nitrogen doped Carbons with high Activity towards Oxygen Reduction coordination polymer fuel cell metal organic framework non-noble catalyst Platinum-free polymer electrolyte membrane Catalysts Cobalt Cobalt compounds Coordination reactions Crystalline materials Doping (additives) Electrolytes Electrolytic reduction Fuel cells Methanol Nitrogen Organic polymers Organometallics Platinum Polymers Proton exchange membrane fuel cells (PEMFC) Coordination Polymers Electrokinetic parameters Exchange current densities Metal organic framework Metalorganic frameworks (MOFs) Nitrogen-doped mesoporous carbons Oxygen reduction reaction Polymer electrolyte membranes Polyelectrolytes In order to obtain Platinum-free catalysts for the Oxygen Reduction Reaction (ORR) in Fuel Cells, Nitrogen doped mesoporous carbons were prepared from pyrolysis of three Cobalt metal organic frameworks (MOFs), one linear coordination polymer and one complex. Electron micrographs revealed the presence of pores of different sizes in the samples. Particles resembled polyhedrons, sponges, bars, etc. The catalyst derived from Cobalt 2,3-pyrazinedicarboxylate polymer (700 °C) exhibited attractive electrokinetic parameters for the ORR comparable to those of Pt 20% in acidic medium (Tafel slope = 82 mV dec−1, exchange current density = 10 mA cm−1, equilibrium potential = 907 mV (vs RHE), half wave potential = 720 mV (vs RHE), number of exchanged electrons ca. 4.0, 0.5 M H2SO4). Limiting current and H2O2 yield (< 10%) are similar to those of ZIF-67 derived materials. The half wave potential is shifted to 820 mv (vs RHE) in alkaline medium (0.1 M KOH). The former sample holds a surface area on mesopores which duplicates that of the ZIF-67 700 °C. A correlation was found between the current intensity for the ORR and the mesopore area occupied by N (%N x specific area on mesopores). The Cobalt 2,3-pyrazinedicarboxylate derived material (700 °C) showed high methanol tolerance compared to Pt 20% (0.05 M methanol, 0.5 M H2SO4), and good ORR durability (after 3000 cycles between 0.25–1.15 V vs RHE, O2 saturated 0.5M H2SO4). © 2017 Elsevier Ltd 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v251_n_p638_DiazDuran http://hdl.handle.net/20.500.12110/paper_00134686_v251_n_p638_DiazDuran |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
coordination polymer fuel cell metal organic framework non-noble catalyst Platinum-free polymer electrolyte membrane Catalysts Cobalt Cobalt compounds Coordination reactions Crystalline materials Doping (additives) Electrolytes Electrolytic reduction Fuel cells Methanol Nitrogen Organic polymers Organometallics Platinum Polymers Proton exchange membrane fuel cells (PEMFC) Coordination Polymers Electrokinetic parameters Exchange current densities Metal organic framework Metalorganic frameworks (MOFs) Nitrogen-doped mesoporous carbons Oxygen reduction reaction Polymer electrolyte membranes Polyelectrolytes |
| spellingShingle |
coordination polymer fuel cell metal organic framework non-noble catalyst Platinum-free polymer electrolyte membrane Catalysts Cobalt Cobalt compounds Coordination reactions Crystalline materials Doping (additives) Electrolytes Electrolytic reduction Fuel cells Methanol Nitrogen Organic polymers Organometallics Platinum Polymers Proton exchange membrane fuel cells (PEMFC) Coordination Polymers Electrokinetic parameters Exchange current densities Metal organic framework Metalorganic frameworks (MOFs) Nitrogen-doped mesoporous carbons Oxygen reduction reaction Polymer electrolyte membranes Polyelectrolytes MOF derived Mesoporous Nitrogen doped Carbons with high Activity towards Oxygen Reduction |
| topic_facet |
coordination polymer fuel cell metal organic framework non-noble catalyst Platinum-free polymer electrolyte membrane Catalysts Cobalt Cobalt compounds Coordination reactions Crystalline materials Doping (additives) Electrolytes Electrolytic reduction Fuel cells Methanol Nitrogen Organic polymers Organometallics Platinum Polymers Proton exchange membrane fuel cells (PEMFC) Coordination Polymers Electrokinetic parameters Exchange current densities Metal organic framework Metalorganic frameworks (MOFs) Nitrogen-doped mesoporous carbons Oxygen reduction reaction Polymer electrolyte membranes Polyelectrolytes |
| description |
In order to obtain Platinum-free catalysts for the Oxygen Reduction Reaction (ORR) in Fuel Cells, Nitrogen doped mesoporous carbons were prepared from pyrolysis of three Cobalt metal organic frameworks (MOFs), one linear coordination polymer and one complex. Electron micrographs revealed the presence of pores of different sizes in the samples. Particles resembled polyhedrons, sponges, bars, etc. The catalyst derived from Cobalt 2,3-pyrazinedicarboxylate polymer (700 °C) exhibited attractive electrokinetic parameters for the ORR comparable to those of Pt 20% in acidic medium (Tafel slope = 82 mV dec−1, exchange current density = 10 mA cm−1, equilibrium potential = 907 mV (vs RHE), half wave potential = 720 mV (vs RHE), number of exchanged electrons ca. 4.0, 0.5 M H2SO4). Limiting current and H2O2 yield (< 10%) are similar to those of ZIF-67 derived materials. The half wave potential is shifted to 820 mv (vs RHE) in alkaline medium (0.1 M KOH). The former sample holds a surface area on mesopores which duplicates that of the ZIF-67 700 °C. A correlation was found between the current intensity for the ORR and the mesopore area occupied by N (%N x specific area on mesopores). The Cobalt 2,3-pyrazinedicarboxylate derived material (700 °C) showed high methanol tolerance compared to Pt 20% (0.05 M methanol, 0.5 M H2SO4), and good ORR durability (after 3000 cycles between 0.25–1.15 V vs RHE, O2 saturated 0.5M H2SO4). © 2017 Elsevier Ltd |
| title |
MOF derived Mesoporous Nitrogen doped Carbons with high Activity towards Oxygen Reduction |
| title_short |
MOF derived Mesoporous Nitrogen doped Carbons with high Activity towards Oxygen Reduction |
| title_full |
MOF derived Mesoporous Nitrogen doped Carbons with high Activity towards Oxygen Reduction |
| title_fullStr |
MOF derived Mesoporous Nitrogen doped Carbons with high Activity towards Oxygen Reduction |
| title_full_unstemmed |
MOF derived Mesoporous Nitrogen doped Carbons with high Activity towards Oxygen Reduction |
| title_sort |
mof derived mesoporous nitrogen doped carbons with high activity towards oxygen reduction |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v251_n_p638_DiazDuran http://hdl.handle.net/20.500.12110/paper_00134686_v251_n_p638_DiazDuran |
| _version_ |
1768546097090789376 |