Highly Active and Stable Pt3Cr/C Alloy Catalyst in H2-PEMFC. Issue 8 (1st January 2015)

• Record Type: Journal Article
• Authors: Sakthivel, M.; Radev, I.; Peinecke, V.; Drillet, J.-F.
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 8(2015)
• Page Start: F901
• Page End: F906
• Publication Date: 2015-01-01
• Subjects: Accelerated Degradation Test -- Bi- metallic alloy -- Corrosion test -- Mass and Specific activity -- ORR -- PEMFC -- RDE; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0761508jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : In the present work, a 40 wt% Pt3 Cr/C alloy catalyst showed enhanced activity under both half-cell and full-cell conditions as well as excellent corrosion stability compared to those of the 40 wt% Pt/C benchmark catalyst. In half-cell experiments at 2 mA cm − ², Pt3 Cr/C catalyst exhibited 10 mV less over-potential and twofold higher specific and mass activity for ORR than Pt/C. The average particle size grew from 4.5 nm up to "only" 6–8 nm after 7000 degradation cycles. For comparison, average particle size of Pt/C increased from 4.5 up to 10–30 nm. After 1000 degradation cycles in full-cell, MEA with Pt3 Cr/C cathode exhibits an excellent maximum power density retention of about 94% compared to only 59% for the MEA with the commercial catalyst.