Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7712405 | International Journal of Hydrogen Energy | 2016 | 9 Pages |
Abstract
Activated carbon composite support (ACCS) is synthesized using a novel methodology developed at University of South Carolina (USC). The ACCS shows good thermal stability similar to that of carbon nanofibers (CNFs). Pt/ACCS catalyst shows excellent support stability under simulated start-up/shut-down operating conditions (1.0-1.5Â V, 5000 cycles). The Pt/ACCS shows a maximum power density of 722Â mWÂ cmâ2 while commercial Pt/C and Pt/290G catalysts show 495 and 530Â mWÂ cmâ2, respectively. Furthermore, Pt/ACCS shows no loss of mass activity and maximum power density after 5000 cycles at 1.0-1.5Â V. The commercial Pt/C and Pt/290G catalysts show drastic mass activity losses (57.5% and 66.2%, respectively) and maximum power density losses (88.7% and 84.0%, respectively). The good activity and excellent stability of Pt/ACCS catalyst are attributed to the higher degree of graphitization and enhanced hydrophobicity of ACCS. For the first time, we report a carbon-based support which is stable under simulated start-up/shut-down operating conditions.
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Authors
Taekeun Kim, Branko N. Popov,