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.

scholarly journals 3D porous graphitic nanocarbon for enhancing the performance and durability of Pt catalysts: a balance between graphitization and hierarchical porosity

2019 ◽  
Vol 12 (9) ◽  
pp. 2830-2841 ◽  
Author(s):  
Zhi Qiao ◽  
Sooyeon Hwang ◽  
Xing Li ◽  
Chenyu Wang ◽  
Widitha Samarakoon ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Carbon Support ◽  
Proton Exchange ◽  
Pt Catalysts ◽  
Carbon Corrosion ◽  
Cathode Catalysts ◽  
Hierarchical Porosity ◽  
Exchange Membrane

A carbon support with favorable balance between graphitization and hierarchical porosity is promising to address carbon corrosion issue in cathode catalysts for proton exchange membrane fuel cells (PEMFCs).

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...

Novel Proton Exchange Membrane for High Temperature Fuel Cells

1997 ◽  
Vol 496 ◽  
Author(s):  
M. Bhamidipati ◽  
E. Lazaro ◽  
F. Lyons ◽  
R. S. Morris
Keyword(s):  
Thermal Stability ◽  
Fuel Cells ◽  
High Temperature ◽  
Electrochemical Performance ◽  
Proton Exchange Membrane ◽  
Research Effort ◽  
Analysis Data ◽  
Proton Exchange ◽  
Temperature Conductivity ◽  
Exchange Membrane

ABSTRACTThis research effort sought to demonstrate that combining select phosphonic acid additives with Nafion could improve Nafion's high temperature electrochemical performance. A 1:1 mixture of the additive with Nafion, resulted in a film that demonstrated 30% higher conductivity than a phosphoric acid equilibrated Nafion control at 175°C. This improvement to the high temperature conductivity of the proton exchange membrane Nafion is without precedent. In addition, thermal analysis data of the test films suggested that the additives did not compromise the thermal stability of Nafion. The results suggest that the improved Nafion proton exchange membranes could offer superior electrochemical performance, but would retain the same degree of thermal stability as Nafion. This research could eventually lead to portable fuel cells that could oxidize unrefined hydrocarbon fuels, resulting in wider proliferation of fuel cells for portable power.

scholarly journals Boosting efficiency and stability using zirconia nanosphere-held carbon for proton exchange membrane fuel cells

RSC Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 472-480 ◽  
Author(s):  
P. Dhanasekaran ◽  
Sharon R. Williams ◽  
D. Kalpana ◽  
Santoshkumar D. Bhat
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Stress Test ◽  
Pt Nanoparticles ◽  
Proton Exchange ◽  
Carbon Corrosion ◽  
Accelerated Stress Test ◽  
Exchange Membrane

Corrosion during the accelerated stress test for Pt on carbon and Pt on Zr–C 3 composite representing the steps for reduced carbon corrosion, stabilized Pt nanoparticles and re-deposition of Pt nanoparticles on the ZrO2:C composite.

Synergien zwischen Batterie- und Brennstoffzellen/Synergies between battery and fuel cells - Evaluation based on structural and machine parameters in production processes

2020 ◽  
Vol 110 (10) ◽  
pp. 735-741
Author(s):  
Jens Schäfer ◽  
Hannes Wilhelm Weinmann ◽  
Dominik Mayer ◽  
Tobias Storz ◽  
Janna Hofmann ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Manufacturing Industries ◽  
Sich Eine ◽  
Future Technology ◽  
The Past ◽  
Production Processes ◽  
Exchange Membrane

Nach Ankündigung diverser batterieelektrischer Modelle wird auch die PEM (Proton Exchange Membrane)-Brennstoffzelle als mögliche Zukunftstechnologie im Last- und Linienverkehr diskutiert. Ob und wann sich eine Technologie durchsetzt, hängt von der verwendeten Produktionstechnik ab, denn diese bestimmt Stückzahlen und resultierende Kosten. Die Vergangenheit zeigt, dass sich produzierende Industrien oft entlang vorhandener Kompetenzen in etablierten Bereichen entwickelt haben. In diesem Beitrag sollen daher Synergiepotenziale zwischen der Batterie- und Brennstoffzellenfertigung diskutiert werden.   Following the announcement of various battery electric models, PEM fuel cells are also discussed as a future technology in truck and line traffic. Whether and when a technology will be generally accepted depends largely on the production technology used, as this determines the number of units and the resulting costs. The past has shown that manufacturing industries have often developed along existing competencies in established areas. This article will therefore discuss the potential synergies between battery and fuel cell production.

Nonlinear Analysis of Two-Phase Instabilities in PEMFC Parallel-Channel Cathodes

2010 ◽  
Author(s):  
Nicholas Siefert ◽  
Chi-Hsin Ho ◽  
Shawn Litster
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Liquid Water ◽  
Proton Exchange Membrane ◽  
Critical Issue ◽  
Pem Fuel Cells ◽  
Proton Exchange ◽  
Stoichiometric Ratio ◽  
Two Phase ◽  
Voltage Loss

Liquid water management is a critical issue in the development of proton exchange membrane (PEM) fuel cells. Liquid water produced electrochemically can accumulate and flood the microchannels in the cathodes of PEM fuel cells. Since the liquid coverage of the cathode can fluctuate in time for two-phase flow, the rate of oxygen transport to the cathode catalyst layer can also fluctuate in time, and this can cause the fuel cell power output to fluctuate. This paper will report experimental data on the voltage loss and the voltage fluctuations of a PEM fuel cell due to flooding as a function of the number of parallel microchannels and the air flow rate stoichiometric ratio. The data was analyzed to identify general scaling relationships between voltage loss and fluctuations and the number of channels in parallel and the air stoichiometric ratio. The voltage loss was found to scale proportionally to the square root of the number of channels divided by the air stoichiometric ratio. The amplitude of the fluctuations was found to be linearly proportional to the number of microchannels and inversely proportional to the air stoichiometric ratio squared. The data was further analyzed by plotting power spectrums and by evaluating the non-linear statistics of the voltage time-series.

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