Activity of MWCNT sheets and effects of carbonaceous impurities toward the alkaline-based hydrogen evolution reaction
| العنوان: | Activity of MWCNT sheets and effects of carbonaceous impurities toward the alkaline-based hydrogen evolution reaction |
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| المؤلفون: | Arwa AlShareif, Ibrahim Mustafa, Mona Bahman, Saif Almheiri, Aamna AlShehhi, Rahmat Agung Susantyoko, Faisal AlMarzooqi |
| المصدر: | Ionics. 25:4285-4294 |
| بيانات النشر: | Springer Science and Business Media LLC, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Materials science, General Chemical Engineering, General Engineering, General Physics and Astronomy, 02 engineering and technology, Carbon nanotube, Carbon black, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, law.invention, Chemical engineering, law, Impurity, General Materials Science, Hydrogen evolution, 0210 nano-technology, Lower activity |
| الوصف: | Herein, we utilize freestanding sheets of multi-walled carbon nanotube (MWCNT), fabricated through a surface-engineered and controlled approach, to provide direct measurements of activities of MWCNT toward the hydrogen evolution reaction (HER). Since conventional fabrication methods of MWCNT materials can result in different carbonaceous residue contents (as reported in literature), the effect of carbonaceous impurities on the activity of MWCNT toward the HER becomes interesting (not previously recognized). Our results show that increasing amounts of carbonaceous impurities (in the form of carbon black additives) can initially increase the catalytic activity of MWCNT toward the HER, but will result in a lower electrochemical stability and lower activity at higher rates of charge transfer or longer times of charging, for which we propose an electrolytic transport mechanism, related to a debris-formation phenomenon occurring over carbonaceous impurities. The work suggests that carbonaceous impurities’ content should be accounted for during electrochemical studies of MWCNT toward the HER. |
| تدمد: | 1862-0760 0947-7047 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::0bcaf42be8b027c5bed16c22ddbe07ac https://doi.org/10.1007/s11581-019-03008-2 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........0bcaf42be8b027c5bed16c22ddbe07ac |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18620760 09477047 |
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