Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 51, Issue -, Pages 37-40Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2014.12.005
Keywords
Tantalum doped tin oxide; Electrical conductivity; Oxygen reduction reaction; Durability; PEFC; Fused aggregate structure
Categories
Funding
- Research on Nanotechnology for High Performance Fuel Cells (HiPer-FC) project from the New Energy and Industrial Technology Development Organization (NEDO) of Japan
- Ministry of Education, Science, Sports, and Culture of Japan [B24350093]
Ask authors/readers for more resources
We evaluated the cathodic activity and durability of Pt/Ta-SnO2-delta catalysts for the cathodes of polymer electrolyte fuel cells (PEFCs). The Ta-SnO2-delta support had a unique fused aggregated structure, for which the electrical conductivity was ca. 40 times higher than that of another candidate high-durability support, Nb-SnO2-delta with the same support structure. The kinetically controlled current density value at 0.85 V for Pt/Ta-SnO2-delta reached 0.97 mA cm(-2), which was higher than that for a commercial Pt/CB. Chemical stability of Ptfra-SnO2-delta in the high potential range (0.9-1.3 V) was the same as that of the high-durability Pt/Nb-SnO2-delta catalyst and was superior to that of commercial Pt/CB and Pt/GCB. We demonstrated that the more highly electrically conductive Pt/Ta-SnO2-delta is an attractive catalyst for the construction of low-resistance catalyst layers of membrane-electrode assemblies with decreased overpotentials. Thus, we conclude that the Pt/Ta-doped SnO2-delta catalyst is a superior cathode candidate catalyst for PEFCs. (C) 2014 Elsevier B.V. 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