Oxygen reduction activity of cobalt-nitride on nitrogen-doped graphene
Fuel cells technology can offer suitable alternatives to replace one of the most important environmental issues of our days, i.e., fossil fuels. In the last decades, non-precious metal catalysts came in the view such as transition metal-oxides, -nitrides, or even metal free catalysts like N-graphene...
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| Dokumentumtípus: | Könyv része |
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2017
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| Sorozat: | Proceedings of the International Symposium on Analytical and Environmental Problems
23 |
| Kulcsszavak: | Környezetkémia - előadáskivonat |
| Online Access: | http://acta.bibl.u-szeged.hu/56230 |
| LEADER | 02515naa a2200253 i 4500 | ||
|---|---|---|---|
| 001 | acta56230 | ||
| 005 | 20220808154928.0 | ||
| 008 | 190102s2017 hu o 1|| zxx d | ||
| 020 | |a 978-963-306-563-1 | ||
| 040 | |a SZTE Egyetemi Kiadványok Repozitórium |b hun | ||
| 041 | |a zxx | ||
| 100 | 1 | |a Ballai Gergő | |
| 245 | 1 | 0 | |a Oxygen reduction activity of cobalt-nitride on nitrogen-doped graphene |h [elektronikus dokumentum] / |c Ballai Gergő |
| 260 | |c 2017 | ||
| 300 | |a 372 | ||
| 490 | 0 | |a Proceedings of the International Symposium on Analytical and Environmental Problems |v 23 | |
| 520 | 3 | |a Fuel cells technology can offer suitable alternatives to replace one of the most important environmental issues of our days, i.e., fossil fuels. In the last decades, non-precious metal catalysts came in the view such as transition metal-oxides, -nitrides, or even metal free catalysts like N-graphene. Such systems are expected to replace high cost oxygen reduction reaction (ORR) catalysts used nowadays [1]. We hereby demonstrate a simple method for the simultaneous synthesis of cobalt-nitride nanoparticles on nitrogen-doped graphene support. The reported non-precious metal catalyst showed high electrocatalytic activity in ORR, and thus it is a promising alternative cathode-side catalyst in polymer electrolyte membrane (PEM) fuel cells. The catalyst was synthesized from lyophilized graphene-oxide and cobalt(II)-acetate in NH3 flow at high temperature, and the effect of cobalt-nitride amount on catalyst properties was further examined. To this end, transmission electron microscopy (TEM) and X-ray diffractometry (XRD) were employed to monitor the morphological and structural changes in the graphene sheets and the supported cobalt-nitride particles. The electrochemical properties of the catalyst were investigated in a three-electrode cell in oxygen saturated 0.1 M potassiumhydroxide solution at different rotation rates with a rotating disk electrode (RDE) setup. The optimal amount of cobalt-nitride and nitrogen-doped graphene was determined, producing a promising non-precious metal catalyst for oxygen reduction reaction. | |
| 695 | |a Környezetkémia - előadáskivonat | ||
| 700 | 0 | 1 | |a Varga Tamás |e aut |
| 700 | 0 | 1 | |a Haspel Henrik |e aut |
| 700 | 0 | 1 | |a Kukovecz Ákos |e aut |
| 700 | 0 | 1 | |a Kónya Zoltán |e aut |
| 710 | |a International Symposium on Analytical and Environmental Problems (23.) (2017) (Szeged) | ||
| 856 | 4 | 0 | |u http://acta.bibl.u-szeged.hu/56230/1/proceedings_of_isaep_2017_372.pdf |z Dokumentum-elérés |