US EPA

4598177 

Journal Article 

Tuning the oxygen reduction reactivity of interconnected porous carbon by incorporation of phosphorus and activity enhancement through blending with 2D metal dichalcogenides materials 

Mutyala, S; Rajaram, R; Karuppasamy, D; Suresh, C; Mathiyarasu, J 

2018 

Yes 

International Journal of Hydrogen Energy
ISSN: 0360-3199 

43 

9 

4738-4745 

10.1016/j.ijhydene.2017.12.009 

WOS:000428229300054 

Design and construction of strong oxygen reduction reaction (ORR) electrocatalysts with high activity and durability are the main concerns in proton exchange membrane fuel cells (PEMFCs). In this study, a unique interconnected porous carbon (ICPC) and phosphorus doped ICPC (P-ICPC) were synthesized and utilized as a support matrix for ORR in alkaline medium. The activity of P-ICPC further enhanced by compositing with 2D metal dichalcogenide MoS2 materials through facile hydrothermal method. The structural characterization indicated that the addition of phosphorus created more defective site in the carbon structure. The MoS2/P-ICPC catalyst exhibited enhanced ORR activity, and its performance. is close to commercial Pt/C catalyst with regards to current density and onset potential. The synthesized MoS2/P-ICPC catalyst shows better stability regarding activity even after the 2000 cycles of acceleration test. The electron transfer number (n) obtained for MoS2/P-ICPC is similar to 3.8, indicating that the oxygen reduction reaction proceeds via 4e(-) pathway with the similar kinetics of commercial Pt/C. The current results revealed that the synthesized MoS2/P-ICPC material might be a better catalyst for oxygen reduction reaction. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. 

Interconnected porous carbon; P-doping; MoS2; Oxygen reduction; Defective sites