Journal
ELECTROCHIMICA ACTA
Volume 189, Issue -, Pages 175-183Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.12.072
Keywords
Graphene aerogel; Methanol electrooxidation; Pt-based catalyst; Stability
Categories
Funding
- National Natural Science Foundation of China [21273058]
- China postdoctoral science foundation [2012M520731, 2014T70350]
- Heilongjiang postdoctoral financial assistance [LBH-Z12089]
Ask authors/readers for more resources
Three-dimensional (3D) structured Pt/C/graphene aerogel (Pt/C/GA) hybrid as a remarkable high stability electrocatalyst is synthesized through a facile and green hydrothermal process. Thanks to the unique 3D graphene framework structure, Pt/C/GA hybrid catalyst demonstrated enhanced stability towards methanol electrooxidation with no decrease of electrocatalytic activity. Besides, Pt/C/GA hybrid catalyst also exhibits a significantly enhanced stability to scavenge crossover methanol under the high potential in acid solution compared with the standard Pt/C catalyst: Pt/C catalyst lost nearly 40% of its initial activity after 1000 cyclic voltammetry cycles, by contrast, only 16% for Pt/C/GA. Moreover, it is noteworthy that after 200 cycles, the mass activity of Pt/C/GA is always much higher than that of Pt/C. A significant stability enhancement is achieved due to the unique 3D macroporous graphene structure as well as the efficient assembly between the Pt/C catalyst and graphene aerogel. Importantly, our synthetic strategy can be easily applied to the commercial PtRu/C catalyst to improve its durability. This simple, convenient and green synthetic method highlights the potential in fabrication of high durable electrocatalyst for fuel cell applications. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available