Influence of Pt Catalyst Nanoparticle Size on the Electrochemical Performance of PEM Fuel Cells

2019 ◽  
Vol 41 (1) ◽  
pp. 933-936 ◽  
Author(s):  
Daniel J. Groom ◽  
Shreyas Rajasekhara ◽  
Stephanie Matyas ◽  
Zhiwei Yang ◽  
Mallika Gummalla ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Electrochemical Performance ◽  
Pem Fuel Cells ◽  
Nanoparticle Size ◽  
Pt Catalyst ◽  
Catalyst Nanoparticle

Electrochemical catalytic behavior for platinum functionalized TiO2 nanotube arrays in PEM fuel cells

2013 ◽  
Vol 1497 ◽  
Author(s):  
Anurag Y Kawde ◽  
Alexander W O'Toole ◽  
Xiaoli He ◽  
Richard Phillips ◽  
Adam Lemke ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Electrochemical Performance ◽  
Proton Exchange Membrane ◽  
Specific Area ◽  
Carbon Support ◽  
Pem Fuel Cells ◽  
Aqueous Salt Solution ◽  
Proton Exchange ◽  
Nanotube Arrays ◽  
Carbon Corrosion

ABSTRACTConventional carbon electrode supports for platinum used in proton exchange membrane (PEM) fuel cell assemblies have issues related to carbon corrosion at typical cell operating and transient conditions. This corrosion gives rise to the evolution of greenhouse gases such as CO2, eventually degrading the carbon support and causing a loss of the catalyst specific area necessary to achieve the desired electrochemical performance. In this study, preliminary results are presented for Pt-functionalized TiO2 nanotube arrays as cathode catalyst supports for PEM fuel cells. The electrochemically synthesized TiO2 nanotube arrays were functionalized by different weight % of Pt via a solution-based approach using a dilute aqueous salt solution of hexachloroplatanic acid. Electron-beam based characterization techniques were used to study the structural and morphological features of the as-synthesized TiO2 nanotube arrays and functionalized Pt/TiO2 nanotube arrays. The electrochemical performance of the functionalized TiO2 nanotube arrays was studied by using cyclic voltammetry.

Design of graphene sheets-supported Pt catalyst layer in PEM fuel cells

2011 ◽  
Vol 13 (3) ◽  
pp. 258-261 ◽  
Author(s):  
Sehkyu Park ◽  
Yuyan Shao ◽  
Haiying Wan ◽  
Peter C. Rieke ◽  
Vilayanur V. Viswanathan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Catalyst Layer ◽  
Pem Fuel Cells ◽  
Pt Catalyst ◽  
Graphene Sheets ◽  
Supported Pt Catalyst

Novel Deposition of Pt∕C Nanocatalysts and Nafion® Solution on Carbon-Based Electrodes via Electrophoretic Process for PEM Fuel Cells

2006 ◽  
Vol 4 (1) ◽  
pp. 72-78 ◽  
Author(s):  
R. F. Louh ◽  
Hansen Huang ◽  
Felix Tsai
Keyword(s):  
Fuel Cells ◽  
Microstructural Analysis ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Pt Catalyst ◽  
Catalyst Loading ◽  
Power Performance ◽  
Effective Manner ◽  
Platinum Particles ◽  
Carbon Based

Nanosized platinum particles supported on carbon black carriers (Pt∕C) are popular for use in fabrication of proton exchange membrane fuel cells (PEMFCs). Here, an electrophoretic deposition (EPD) process is proposed to investigate the power performance of Pt∕C nanopowders onto various carbon-based electrodes for the PEMFC applications in a better controlled and cost-effective manner. Novel deposition of Pt∕C nanocatalysts and Nafion® solution via electrophoretic process give rise to higher deposition efficiency and a uniform distribution of catalyst and Nafion ionomer on the electrodes of PEMFCs. Preparation of an EPD suspension with good dispersivity is much desirable for an agreeable overall performance of catalyst coating in terms of types of organic solvents, milling processes, and use of pH adjusting agents and surfactants in the EPD suspension. The EPD suspension was prepared by sonication of mixture of Pt∕C nanopowders, Nafion solution and isopropyl alcohol, the optimal pH value of which was reached by using acetic acid or ammonium hydroxide. The colloidal stability of EPD suspension was achieved at pH ∼10 for an EPD suspension of either Pt∕C catalysts or mixture of Pt∕C catalysts and Nafion ionomer. A nicely distributed deposition of Pt∕C nanocatalysts and Nafion ionomer on both hydrophilic or hydrophobic carbon-based electrodes was successfully obtained by using Pt∕C concentration of 1.0g∕l, electrical field of 300V∕cm, and deposition time of 5min. Microstructural analysis results indicate that Pt∕C nanopowders not only embrace the entire surface of carbon fibers but also infiltrate into the gaps and voids in fiber bundles such that a higher contact area of the same loading of Pt∕C nanocatalysts through the EPD process is thus expected. At present, the EPD process can effectively save more of Pt catalyst loading on electrodes in PEMFC, as compared to conventional methods, such as screen printing, brushing, or spraying through the similar level of power performance for PEMFCs.

scholarly journals Ionic Liquid in Phosphoric Acid-Doped Polybenzimidazole (PA-PBI) as Electrolyte Membranes for PEM Fuel Cells: A Review

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 728
Author(s):  
Leong Kok Seng ◽  
Mohd Shahbudin Masdar ◽  
Loh Kee Shyuan
Keyword(s):  
Ionic Liquid ◽  
Fuel Cells ◽  
Phosphoric Acid ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Pem Fuel Cells ◽  
Green Energy ◽  
Pt Catalyst ◽  
Preparation Technique ◽  
Electrolyte Membrane

Increasing world energy demand and the rapid depletion of fossil fuels has initiated explorations for sustainable and green energy sources. High-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) are viewed as promising materials in fuel cell technology due to several advantages, namely improved kinetic of both electrodes, higher tolerance for carbon monoxide (CO) and low crossover and wastage. Recent technology developments showed phosphoric acid-doped polybenzimidazole (PA-PBI) membranes most suitable for the production of polymer electrolyte membrane fuel cells (PEMFCs). However, drawbacks caused by leaching and condensation on the phosphate groups hindered the application of the PA-PBI membranes. By phosphate anion adsorption on Pt catalyst layers, a higher volume of liquid phosphoric acid on the electrolyte–electrode interface and within the electrodes inhibits or even stops gas movement and impedes electron reactions as the phosphoric acid level grows. Therefore, doping techniques have been extensively explored, and recently ionic liquids (ILs) were introduced as new doping materials to prepare the PA-PBI membranes. Hence, this paper provides a review on the use of ionic liquid material in PA-PBI membranes for HT-PEMFC applications. The effect of the ionic liquid preparation technique on PA-PBI membranes will be highlighted and discussed on the basis of its characterization and performance in HT-PEMFC applications.

Influence of carbon nanofiber properties as electrocatalyst support on the electrochemical performance for PEM fuel cells

2010 ◽  
Vol 35 (18) ◽  
pp. 9934-9942 ◽  
Author(s):  
D. Sebastián ◽  
J.C. Calderón ◽  
J.A. González-Expósito ◽  
E. Pastor ◽  
M.V. Martínez-Huerta ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Electrochemical Performance ◽  
Carbon Nanofiber ◽  
Pem Fuel Cells
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