Synthesis of nano-porous carbon and nitrogen doped carbon dots from an anionic MOF: a trace cobalt metal residue in carbon dots promotes electrocatalytic ORR activity
| Autor: | Sohini Bhattacharyya, Bharathi Konkena, Wolfgang Schuhmann, Tapas Kumar Maji, Kolleboyina Jayaramulu |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Carbonization Inorganic chemistry Heteroatom Doping Nanoparticle 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis Metal visual_art visual_art.visual_art_medium Moiety General Materials Science Amine gas treating 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry A. 5:13573-13580 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | Metal–organic frameworks (MOFs) are effective self-sacrificial templates for the synthesis of carbon materials owing to their innate porosity, high carbon content and ease of heteroatom doping. A MgII based anionic MOF {[Mg3(ndc)2.5(HCO2)2(H2O)]·[NH2Me2]·2H2O·DMF} (1) has been carbonized as a sacrificial template for the synthesis of high surface area nanoporous carbon as well as nitrogen doped carbon dots, simply by adjusting the carbonization temperature. The nanoporous carbon synthesized from the MOF precursor exhibits an exceptionally high surface area and high CO2 uptake capacity. The anionic MOF contains dimethyl amine cations in its pores which, owing to their pre-bonded C–N moiety, act as a precursor for N-doping of the carbon dots. The N-doped carbon dots are held together by graphitic stacking and they show electrocatalytic activity as a metal-free catalyst for the oxygen reduction reaction (ORR). Trace amounts of metallic Co nanoparticles were post-synthetically incorporated into the N-doped carbon dots leading to enhanced electrocatalytic activity and stability for the ORR of the resulting material. The controlled design and synthetic strategy presented here offers a new platform for developing highly active and stable electrocatalysts. |
| Databáze: | OpenAIRE |
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