One-step synthesis of dual-transition metal substitution on ionic liquid based N-doped mesoporous carbon for oxygen reduction reaction
| Autor: | Dorjgotov Altansukh, Yukwon Jeon, Yong Gun Shul, Yunseong Ji, Ulziidelger Byambasuren |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Inorganic Chemistry chemistry.chemical_compound Transition metal X-ray photoelectron spectroscopy Materials Chemistry Dicyanamide Renewable Energy Sustainability and the Environment Process Chemistry and Technology Organic Chemistry technology industry and agriculture Mesoporous silica 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Ionic liquid Ceramics and Composites 0210 nano-technology Mesoporous material Cobalt |
| Zdroj: | Carbon letters. 17:53-64 |
| ISSN: | 1976-4251 |
| DOI: | 10.5714/cl.2016.17.1.053 |
| Popis: | Nitrogen (N)-doped ordered mesoporous carbons (OMCs) with a dual transition metal system were synthesized as non-Pt catalysts for the ORR. The highly nitrogen doped OMCs were prepared by the precursor of ionic liquid (3-methyl-1-butylpyridine dicyanamide) for N/C species and a mesoporous silica template for the physical structure. Mostly, N-doped carbons are promoted by a single transition metal to improve catalytic activity for ORR in PEMFCs. In this study, our N-doped mesoporous carbons were promoted by the dual transition metals of iron and cobalt (Fe, Co), which were incorporated into the N-doped carbons lattice by subsequently heat treatments. All the prepared carbons were characterized by via transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). To evaluate the activities of synthesized doped carbons, linear sweep was recorded in an acidic solution to compare the ORR catalytic activities values for the use in the PEMFC system. The dual transition metal promotion improved the ORR activity compared with the single transition metal promotion, due to the increase in the quaternary nitrogen species from the structural change by the dual metals. The effect of different ratio of the dual metals into the N doped carbon were examined to evaluate the activities of the oxygen reduction reaction. |
| Databáze: | OpenAIRE |
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