scholarly journals Real-time imaging of activation and degradation of carbon supported octahedral Pt–Ni alloy fuel cell catalysts at the nanoscale using in situ electrochemical liquid cell STEM

2019 ◽  
Vol 12 (8) ◽  
pp. 2476-2485 ◽  
Author(s):  
Vera Beermann ◽  
Megan E. Holtz ◽  
Elliot Padgett ◽  
Jorge Ferreira de Araujo ◽  
David A. Muller ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Real Time ◽  
Electrochemical Activation ◽  
Real Time Imaging ◽  
Ni Alloy ◽  
Fuel Cell Catalysts ◽  
Nanoscale Imaging ◽  
Liquid Cell

In situ nanoscale imaging of the electrochemical activation and degradation of carbon-supported octahedral Pt–Ni nanocatalysts in real time.

In situ probing of magnetron sputtered Pt-Ni alloy fuel cell catalysts during accelerated durability test using EC-AFM

2017 ◽  
Vol 245 ◽  
pp. 760-769 ◽  
Author(s):  
Ivan Khalakhan ◽  
Mykhailo Vorokhta ◽  
Peter Kúš ◽  
Milan Dopita ◽  
Michal Václavů ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Durability Test ◽  
Ni Alloy ◽  
Fuel Cell Catalysts ◽  
Accelerated Durability Test

scholarly journals Balance of Nanostructure and Bimetallic Interactions in Pt Model Fuel Cell Catalysts: In Situ XAS and DFT Study

2012 ◽  
Vol 134 (23) ◽  
pp. 9664-9671 ◽  
Author(s):  
Daniel Friebel ◽  
Venkatasubramanian Viswanathan ◽  
Daniel J. Miller ◽  
Toyli Anniyev ◽  
Hirohito Ogasawara ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Dft Study ◽  
In Situ Xas ◽  
Model Fuel ◽  
Fuel Cell Catalysts

scholarly journals In situ Liquid TEM Study for Degradation Mechanisms of Fuel Cell Catalysts during Potential Cycling Test

2015 ◽  
Vol 21 (S3) ◽  
pp. 1295-1296 ◽  
Author(s):  
Shinya Nagashima ◽  
Kenta Yoshida ◽  
Tomoki Hiroyama ◽  
Kun Liu ◽  
Yipu Kang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Degradation Mechanisms ◽  
Potential Cycling ◽  
Cycling Test ◽  
Fuel Cell Catalysts

Real-Time Species Distribution Profiling in PEFCs

2004 ◽  
Author(s):  
Q. Dong ◽  
J. Kull ◽  
M. M. Mench
Keyword(s):  
Fuel Cell ◽  
Real Time ◽  
Species Distribution ◽  
High Current Density ◽  
Polymer Electrolyte Fuel Cell ◽  
Transport Parameters ◽  
Flow Paths ◽  
Precise Knowledge ◽  
Multi Phase

Knowledge of the species, current, and high frequency resistance distributions within a polymer electrolyte fuel cell (PEFC) is critical to enable prediction of the local performance and accurately quantify various species transport parameters. In micro and portable fuel cell systems, precise knowledge of steady state and dynamic water transport is especially important. This paper examines the distributed prifile of water vapor and other gas phase species in a PEFC, using a novel real-time technique for in situ species distribution measurement within the reactant flow channels of an operating PEFC. This is accomplished with an Agilent Real-Time Gas Analyzer (RTGA) that enables continuous profiling of changing species mole fractions at many locations along the anode and cathode flow paths, and enables detailed understanding of the time scales of the various multi-phase dynamic transport phenomena. Additionally, the periodic presence of liquid water droplets in the cathode can be observed at high current density with this technique.

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