O2 Reduction Mechanism on Non-Noble Metal Catalysts for PEM Fuel Cells. Part II: A Porous-Electrode Model To Predict the Quantity of H2O2 Detected by Rotating Ring-Disk Electrode

2009 ◽  
Vol 113 (34) ◽  
pp. 15433-15443 ◽  
Author(s):  
Frédéric Jaouen
Keyword(s):  
Fuel Cells ◽  
Noble Metal ◽  
Porous Electrode ◽  
Pem Fuel Cells ◽  
Reduction Mechanism ◽  
Disk Electrode ◽  
Noble Metal Catalysts ◽  
Rotating Ring Disk Electrode ◽  
O2 Reduction ◽  
Porous Electrode Model

scholarly journals Structure of the catalytic sites in Fe/N/C-catalysts for O2-reduction in PEM fuel cells

2012 ◽  
Vol 14 (33) ◽  
pp. 11673 ◽  
Author(s):  
Ulrike I. Kramm ◽  
Juan Herranz ◽  
Nicholas Larouche ◽  
Thomas M. Arruda ◽  
Michel Lefèvre ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Pem Fuel Cells ◽  
O2 Reduction ◽  
Catalytic Sites

Studies on the Reduction Mechanism of Oxygen on Ag/C Catalysts in Alkaline Solutions

2013 ◽  
Vol 10 (6) ◽  
Author(s):  
Jia-Jun Han ◽  
De-Li Liu ◽  
Lin Geng
Keyword(s):  
Cyclic Voltammetry ◽  
Coordination Polymer ◽  
Oxygen Reduction Reaction ◽  
Reduction Reaction ◽  
Alkaline Solutions ◽  
Test Results ◽  
Reduction Mechanism ◽  
Disk Electrode ◽  
Rotating Ring Disk Electrode ◽  
Crystallite Sizes

Carbon-supported silver (Ag/C) catalysts with different Ag contents are prepared using the Ag (I) coordination polymer, [Ag(C7H6NO2)(C6H12N4)(H2O)]n. The mechanism and activity of the oxygen reduction reaction (ORR) on these Ag/C catalysts are investigated by the cyclic voltammetry and the rotating ring disk electrode (RRDE) in alkaline solutions. The test results indicate that, under the same Ag crystallite sizes, the activities increase with increasing Ag contents from 5 to 20 wt.% and the ORR proceeds by a four-electron pathway on Ag/C catalysts, but with decreasing Ag contents, the ORR is catalyzed via the four-electron pathway and the two-electron pathway simultaneously.

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