Effect of inert gas flow on hydrogen underpotential deposition measurements in polymer electrolyte fuel cells

2007 ◽  
Vol 9 (7) ◽  
pp. 1607-1612 ◽  
Author(s):  
I.A. Schneider ◽  
D. Kramer ◽  
A. Wokaun ◽  
G.G. Scherer
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Gas Flow ◽  
Underpotential Deposition ◽  
Polymer Electrolyte Fuel Cells ◽  
Inert Gas

5 kWe LPG Hydrogen Generator for Polymer Electrolyte Fuel Cells: Momentum-Based Modeling of an Autothermal Reformer

2006 ◽  
Vol 4 (2) ◽  
pp. 210-218 ◽  
Author(s):  
F. Cipitì ◽  
V. Recupero ◽  
L. Pino ◽  
A. Vita ◽  
M. Laganà
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Gas Flow ◽  
Control Plant ◽  
Polymer Electrolyte Fuel Cells ◽  
Operating Conditions ◽  
Automation System ◽  
Processing Unit ◽  
Hydrogen Generator ◽  
Rich Mixture

This paper presents a two-dimensional model to describe the gas flow in an integrated reactor, developed at the CNR-ITAE Institute, and aimed to design a βeta5kWe hydrogen generator, named HYGen II, to integrate with polymer electrolyte fuel cells (PEFCs) for residential applications. The model is able to simulate velocity profiles in order to investigate the reactor geometrical key parameters. The unit can convert light hydrocarbons (methane, propane, LPG, butane) into a hydrogen rich mixture. The processing unit consists of an innovative integrated dual bed reactor, filled with pellet catalysts: a proprietary Pt∕CeO2 autothermal reforming (ATR) and a commercial intermediate temperature water gas shift (ITWS). For the last clean-up step, a single-stage preferential oxidation (PROX) process has been adopted. Moreover, an automation system to monitor operating conditions and control plant equipment has been designed.

New Conceptual Gas Distributor With Mass Transfer Enhancing Function in Polymer Electrolyte Fuel Cells

2004 ◽  
Author(s):  
P. W. Li ◽  
S. P. Chen ◽  
M. K. Chyu
Keyword(s):  
Mass Transfer ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Gas Flow ◽  
Flow Fields ◽  
Pem Fuel Cells ◽  
Polymer Electrolyte Fuel Cells ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Sharp Drop

A new conceptual structure of the gas distributors in polymer electrolyte fuel cells (PEFC) or proton exchange membrane (PEM) fuel cells is developed in this work. Basically, instead of partitioned channels and non-interrupted walls, the proposed new gas distributors make use of discretized elements as the current collector in the flow fields, which can help to enhance the mass transfer in the gas flow fields while maintaining the function of transmitting current out of the fuel cell. Experimental operation without external humidification of the reactant gases for single PEM fuel cells and cell stacks using conventional and the currently presented gas distributors were conducted for comparison and verification. It was found that the maximum operational cell current, beyond which there is a sharp drop of the cell voltage, could be significantly improved when using the currently proposed gas distributors and the same membrane-electrode-assembly (MEA) sheets. Correspondingly, the output electrical power can have at least 11 percent increment for the operation with free-convective airflow and around 50 percent increment for the operation with forced convective airflow.

scholarly journals Synthesis of catalysts with fine platinum particles supported by high-surface-area activated carbons and optimization of their catalytic activities for polymer electrolyte fuel cells

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20601-20611
Author(s):  
Md. Mijanur Rahman ◽  
Kenta Inaba ◽  
Garavdorj Batnyagt ◽  
Masato Saikawa ◽  
Yoshiki Kato ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
High Performance ◽  
Activated Carbons ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Polymer Electrolyte Fuel Cells ◽  
Supported Platinum ◽  
Platinum Particles

Herein, we demonstrated that carbon-supported platinum (Pt/C) is a low-cost and high-performance electrocatalyst for polymer electrolyte fuel cells (PEFCs).

Iron-Based Catalysts with Improved Oxygen Reduction Activity in Polymer Electrolyte Fuel Cells

Science ◽  
2009 ◽  
Vol 324 (5923) ◽  
pp. 71-74 ◽  
Author(s):  
Michel Lefèvre ◽  
Eric Proietti ◽  
Frédéric Jaouen ◽  
Jean-Pol Dodelet
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Reduction Activity ◽  
Iron Based ◽  
Iron Based Catalysts
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