The role of arginine as nitrogen doping and carbon source for enhanced oxygen reduction reaction
| Autor: | Seok-Hyeon Yun, Ji-Eun Won, Da-Hee Kwak, Kyeng-Bae Ma, Moon Hyun Koh, Kyung-Won Park, Sang-Beom Han, Hyun-Suk Park, Do-Hyoung Kim, Jin-Young Park, Suk-Hui Kwon |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Scanning electron microscope Inorganic chemistry Doping Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis symbols.namesake Fuel Technology chemistry Transmission electron microscopy Desorption Specific surface area symbols 0210 nano-technology Raman spectroscopy Carbon |
| Zdroj: | International Journal of Hydrogen Energy. 43:1479-1488 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2017.11.173 |
| Popis: | Doped carbon nanostructures as non-precious metal (NPM) catalysts for oxygen reduction reaction (ORR) in acid medium are mainly synthesized using 5, 10, 15, 20-tetrakis (4-methoxyphenyl)-porphyrin-Fe (III) chloride (Fe-TMPP) as doping and carbon sources. In this study, the doped carbon nanostructures used as cathode NPM catalysts for ORR are prepared using a mixture of iron phthalocyanine (FePc) and arginine as doping and carbon sources. The morphology and composition of the as-prepared samples are characterized using field-emission scanning electron microscopy, field-emission transmission electron microscopy, and energy dispersive X-ray (EDX) spectroscopy. The crystal and pore structures are analyzed using X-ray diffraction method, Raman spectroscopy, and nitrogen adsorption/desorption method. The sample prepared using a precursor mixture with a proper ratio of FePc and arginine exhibits significantly superior ORR performance, i.e. high specific activity, enhanced half-wave potential, and improved stability in an acid medium, as even compared to a commercial Pt/C. The improved ORR properties is mainly attributed to high portion of pyridinic N state with a relatively high specific surface area, which can result from the FePc precursor surrounded by the fused arginine. |
| Databáze: | OpenAIRE |
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