Development of non-noble Co–N–C electrocatalyst for high-temperature proton exchange membrane fuel cells

Date

2020-11-27

Author

Eren, Enis Oğuzhan
Özkan, Necati
Devrim, Yılser

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© 2020 Hydrogen Energy Publications LLCThe development of a non-noble Co–N/MWCNT (MWCNT = multi-walled carbon nanotubes) electrocatalyst is achieved through the high-temperature pyrolysis method and successfully characterized by five-step physico-chemical analysis. By utilizing high-resolution analytical surface characterization methods, the chemical states of elements are determined, and the presence of Co-Nx sites is confirmed. ORR activity of a Co–N/MWCNT is found to be auspicious. The maximum number of transferred-electron (n) and the diffusion-limiting current density (jd) are calculated as 3.95 and 4.53 mA· cm−2, respectively. The catalyst is further evaluated under a single-cell test station. The test results show that the current and power density values of Co–N/MWCNT are found superior to those of the commercial Pt/C at the 150 °C and 160 °C (e.g., 57 vs. 69 mW· cm−2 at 150 °C). Due to some stability issues, it is observed that the performance of the Co–N/MWCNT catalyst is slightly decreased while switching the temperature towards 180 °C.

Subject Keywords

Fuel Technology, Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, Condensed Matter Physics

URI

https://hdl.handle.net/11511/69608

Journal

International Journal of Hydrogen Energy

DOI

https://doi.org/10.1016/j.ijhydene.2020.09.025

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

E. O. Eren, N. Özkan, and Y. Devrim, “Development of non-noble Co–N–C electrocatalyst for high-temperature proton exchange membrane fuel cells,” International Journal of Hydrogen Energy, pp. 33957–33967, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/69608.