A free-standing NiCr-CNT@C anode mat by electrospinning for a high-performance urea/H2O2 fuel cell
| Autor: | Gautam Das, Hyon Hee Yoon, Bang Ju Park, Bohyeon Kim, Dal Ho Lee |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
Materials science Carbonization General Chemical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox Electrospinning 0104 chemical sciences Catalysis law.invention Anode chemistry.chemical_compound chemistry Chemical engineering law Specific surface area Electrochemistry Urea Calcination 0210 nano-technology |
| Zdroj: | Electrochimica Acta. 354:136657 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2020.136657 |
| Popis: | A highly porous free-standing NiCr-bimetallic catalyst is synthesized by electrospinning and carbonization and is applied as an anode in a direct urea/H2O2 fuel cell for electro-oxidation of urea. It is observed that the morphology of the calcined NiCr catalyst, which has a higher specific surface area, is identical to that of the electrospun NiCr catalyst fiber. Cr-doping at 40% (Cr/Ni) significantly increases the oxidation peak current of the urea oxidation reaction. The addition of carbon nanotubes also considerably enhances the catalytic activity. A direct urea/H2O2 fuel cell, which utilizes the synthesized catalyst (NiCr-CNT@C) as a free-standing anode, exhibits excellent performance with a maximum power density of 48.1 mW cm−2 and an open-circuit voltage of 0.92 V at 80 °C. Thus, the highly porous free-standing NiCr-CNT@C catalyst mat can be employed as an efficient anode material for urea oxidation in urea fuel cells. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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