Iron- and Nitrogen-Functionalized Graphene Nanosheet and Nanoshell Composites as a Highly Active Electrocatalyst for Oxygen Reduction Reaction
| العنوان: | Iron- and Nitrogen-Functionalized Graphene Nanosheet and Nanoshell Composites as a Highly Active Electrocatalyst for Oxygen Reduction Reaction |
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| المؤلفون: | Aiping Yu, Jason Wu, Bae-Jung Kim, Dong Un Lee, Zhongwei Chen, Drew Higgins |
| المصدر: | The Journal of Physical Chemistry C. 117:26501-26508 |
| بيانات النشر: | American Chemical Society (ACS), 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Materials science, Graphene, Inorganic chemistry, Electrolyte, Electrocatalyst, Nanoshell, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Catalysis, law.invention, General Energy, law, Physical and Theoretical Chemistry, Rotating disk electrode, Voltammetry, Nanosheet |
| الوصف: | In this work, we develop a simple method to thermally synthesize a nonprecious metal-based nitrogen-doped graphene (NG) electrocatalyst using exfoliated graphene (Ex-G) and urea with varying amounts of iron (Fe) precursor. The morphology and structural features of the synthesized electrocatalyst (Fe-NG) were characterized by SEM and TEM, revealing the existence of graphitic nanoshells that potentially contribute to the ORR activity by providing a higher degree of edge plane exposure. The surface elemental composition of the catalyst was analyzed through XPS, which showed a high content of a total N species (∼8 at. %), indicative of the effective N-doping, present mostly in the form of pyridinic nitrogen groups. The oxygen reduction reaction (ORR) performance of the catalyst was evaluated by rotating disk electrode voltammetry in alkaline electrolyte and in a zinc-air battery cell. Fe-NG demonstrated high onset and half-wave potentials of −0.023 V (vs SCE) and −0.110 V (vs SCE), respectively. This excellen... |
| تدمد: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp410014a |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::93294771e73e2cbf7b88559420ce810f https://doi.org/10.1021/jp410014a |
| رقم الانضمام: | edsair.doi...........93294771e73e2cbf7b88559420ce810f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19327455 19327447 |
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| DOI: | 10.1021/jp410014a |