E3S Web Conf.
Volume 355, 20222022 Research, Invention, and Innovation Congress (RI²C 2022)
|Number of page(s)||8|
|Published online||12 August 2022|
N and S Dual-Doped Mesoporous Carbon Nanostructure as a High Performance and Durable Metal Free Oxygen Reduction Reaction Electrocatalyst
1 Faculty of Engineering and Technology, King Mongkut’s University of Technology North Bangkok Rayong Campus, Thailand
2 Faculty of Science, Energy and Environment, King Mongkut’s University of Technology North Bangkok Rayong Campus, Thailand
3 Integrated Chemistry Research Center for Sustainable Technology (ICRT), Science and Technology Research Institute, King Mongkut’s University of Technology North Bangkok, Thailand
4 Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Thailand
5 Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand
6 Department of Energy Science & Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Republic of Korea
* Corresponding author: firstname.lastname@example.org
Discovering a high performance, durable, and cost-effective oxygen reduction reaction (ORR) electrocatalyst is a key strategy for widespread use of the high efficiency and environmentally friendly fuel cell and metal-air battery technologies. Herein, we fabricate a high performance and durable metal free N and S dual-doped mesoporous carbon nanostructure (NS-VXC) ORR catalyst using solid state thermolysis at 700 °C for 1 h. The fabricated catalyst exhibits nanocarbon aggregated chain-like morphology with a high surface area and mesoporous structure. The amount of N and S dopants embedded in mesoporous carbon nanostructure is found to be 3.2 and 1.1%, respectively which significantly attribute to the synergistic effect of spin and charge density leading to not only superior ORR performance but excellent durability in the alkaline environment as well. Rotating ring disk electrode analysis reveals the codoped NS-VXC catalyst possesses a direct 4-electron transfer number pathway with extremely low peroxide intermediate content. Compared to the benchmark Pt/C catalyst, the fabricated NS-VXC catalyst generated 10 mV ORR performance outperform and negligible performance degradation after the 10,000 ORR cycling test. These results suggest that an innovative solid state thermolysis methodology can be a powerful nanomaterial fabrication technique to generate high performance and excellent durability electrocatalyst for green energy applications.
Key words: N and S codoped carbon / Metal free ORR catalyst / Oxygen reduction reaction / Fuel cell
© The Authors, published by EDP Sciences, 2022
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