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Electrochemical Test Procedures for Accelerated Evaluation of Fuel Cell Cathode Catalyst Degradation
Author(s) -
Marcu A.,
Toth G.,
Behm R. J.
Publication year - 2014
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201300138
Subject(s) - cathode , electrochemistry , degradation (telecommunications) , catalysis , materials science , fuel cells , square wave , cell voltage , voltage , nuclear engineering , environmental science , chemical engineering , analytical chemistry (journal) , computer science , electrode , chemistry , chromatography , anode , electrical engineering , engineering , telecommunications , biochemistry
Abstract The paper introduces an accelerated test procedure that was developed to evaluate the cathode catalyst stability. It is based on systematic analysis of square wave cycles (SWC) in comparison to triangular wave cycles (TWC). Two voltage windows were used: (i) 0.6–0.9 V to simulate the fuel cell drive cycles and (ii) 0.6–1.2 V to accelerate the test. When simulating the drive cycles over 6,000 h, an estimated loss of 40% in electrochemical surface area (ECSA) is found. Increasing the potential window, the testing time could be reduced to 20 h for TWC and for SWC to 4 h.