Oxygen reduction activities compared in rotating-disk electrode and proton exchange membrane fuel cells for highly active FeNC catalysts

2013 ◽  
Vol 87 ◽  
pp. 619-628 ◽  
Author(s):  
F. Jaouen ◽  
V. Goellner ◽  
M. Lefèvre ◽  
J. Herranz ◽  
E. Proietti ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Rotating Disk ◽  
Proton Exchange ◽  
Rotating Disk Electrode ◽  
Disk Electrode ◽  
Highly Active ◽  
Exchange Membrane

scholarly journals Annealing Behaviour of Pt and PtNi Nanowires for Proton Exchange Membrane Fuel Cells

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1473 ◽  
Author(s):  
Peter Mardle ◽  
Shangfeng Du
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Rotating Disk ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Rotating Disk Electrode ◽  
Vertically Aligned ◽  
Exchange Membrane ◽  
Ptni Alloy

PtNi alloy and hybrid structures have shown impressive catalytic activities toward the cathodic oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). However, such promise does not often translate into improved electrode performances in PEMFC devices. In this contribution, a Ni impregnation and subsequent annealing method, translatable to vertically aligned nanowire gas diffusion electrodes (GDEs), is shown in thin-film rotating disk electrode measurements (TFRDE) to enhance the ORR mass activity of Pt nanowires (NWs) supported on carbon (Pt NWs/C) by around 1.78 times. Physical characterisation results indicate that this improvement can be attributed to a combination of Ni alloying of the nanowires with retention of the morphology, while demonstrating that Ni can also help improve the thermal stability of Pt NWs. These catalysts are then tested in single PEMFCs. Lower power performances are achieved for PtNi NWs/C than Pt NWs/C. A further investigation confirms the different surface behaviour between Pt NWs and PtNi NWs when in contact with electrolyte ionomer in the electrodes in PEMFC operation. Indications are that this interaction exacerbates reactant mass transport limitations not seen with TFRDE measurements.

Pt3Ni/C and Pt3Co/C cathodes as electrocatalysts for use in oxygen sensors and proton exchange membrane fuel cells

2020 ◽  
Vol 75 (12) ◽  
pp. 1029-1035
Author(s):  
Yu-Ching Weng ◽  
Cheng-Jen Ho ◽  
Hui-Hsuan Chiao ◽  
Chen-Hao Wang
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Chemical Reduction ◽  
Energy Dispersive Spectrometer ◽  
Rotating Disk ◽  
Proton Exchange ◽  
Rotating Disk Electrode ◽  
Membrane Electrode ◽  
Detection Range ◽  
Exchange Membrane

AbstractThe composites Pt3Ni/C and Pt3Co/C are electrocatalysts for oxygen reduction reactions (ORRs). This study compares the electrocatalytic activity of these electrodes that are used to detect oxygen, and determines their suitability for use in proton exchange membrane fuel cells (PEMFCs). Chemical reduction is used to produce the Pt3Ni/C and Pt3Co/C electrocatalysts. The particle size, elemental composition and crystallinity of the intermetallic electrocatalysts are determined using transmission electron microscopy (TEM) and an energy-dispersive spectrometer (EDX). The ORR activity of the Pt3Ni/C and Pt3Co/C electrocatalysts is determined using cyclic voltammetry (CV), a polarization curve (PC) and a rotating disk electrode (RDE). The Pt3Ni/C electrode registers a greater current for the ORR as compared to the Pt3Co/C electrode. Both electrodes exhibit a linear relationship between response current and oxygen concentration in the detection range from 100 to 1000 ppm. The Pt3Ni/C electrode exhibits a significant sensitivity to oxygen up to 13.4 μA ppm−1 cm−2. A membrane electrode assembly (MEA) that is produced using Pt3Ni/C as a cathodic electrocatalyst in a single PEMFC generates a maximum power density of 1097 mW cm−2.

scholarly journals Design of ternary Pt-CoZn alloy catalysts coated with N-doped carbon towards acidic oxygen reduction

2021 ◽  
Author(s):  
Xieweiyi Ye ◽  
Yakun Xue ◽  
Kaijia Li ◽  
Wen Tang ◽  
Xiao Han ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Commercial Applications ◽  
Exchange Membrane ◽  
Alloy Catalysts

Improving the activity and durability of Pt-based electrocatalysts used in the acidic oxygen reduction reaction (ORR) is a great task for the commercial applications of proton-exchange membrane fuel cells. Alloying...

Development of high stable Pt-based ORR catalyst over Mn-modified polyaniline-based carbon nanofiber

2021 ◽  
Author(s):  
Hong Zhu ◽  
Qingjun Chen ◽  
Jinghua Yu ◽  
Qian Zhou ◽  
Fanghui Wang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Carbon Nanofiber ◽  
Carbon Support ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Key Factors ◽  
Exchange Membrane

The corrosion of carbon support is one of key factors causing deactivation of Pt-based oxygen reduction reaction (ORR) catalysts for proton exchange membrane fuel cells. In this work, a highly...

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