Metal-organic framework-derived Ni@C and NiO@C as anode catalysts for urea fuel cells
- Authors
- Tran T.Q.N.; Park B.J.; Yun W.H.; Duong T.N.; Yoon H.H.
- Issue Date
- Jan-2020
- Publisher
- Nature Research
- Citation
- Scientific Reports, v.10, no.1
- Journal Title
- Scientific Reports
- Volume
- 10
- Number
- 1
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/17814
- DOI
- 10.1038/s41598-019-57139-7
- ISSN
- 2045-2322
- Abstract
- Highly porous self-assembled nanostructured Ni@C and NiO@C were synthesized via calcination of a Ni-based metal–organic framework. The morphology, structure, and composition of as synthesized Ni@C and NiO@C were characterized by SEM, FIB-SEM, TEM, and XRD. The electro-catalytic activity of the Ni@C and NiO@C catalysts towards urea oxidation was investigated using cyclic voltammetry. It was found that the Ni@C had a higher residual carbon content and a higher specific surface area than NiO@C, thus exhibiting an enhanced electrochemical performance for urea oxidation. A direct urea fuel cell with Ni@C as an anode catalyst featured an excellent maximum power density of 13.8 mW cm−2 with 0.33 M urea solution in 1 M KOH as fuel and humidified air as oxidant at 50 °C, additionally showing excellent stability during continuous 20-h operation. Thus, this work showed that the highly porous carbon-supported Ni catalysts derived from Ni-based metal–organic framework can be used for urea oxidation and as an efficient anode material for urea fuel cells. © 2020, The Author(s).
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Collections - 공과대학 > 화공생명공학과 > 1. Journal Articles
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