Controlling Ionomer Film Morphology through Altering Pt Catalyst Surface Properties for Polymer Electrolyte Membrane Fuel Cells

2020 ◽  
Vol 2 (5) ◽  
pp. 1807-1818 ◽  
Author(s):  
Ji Hye Lee ◽  
Gisu Doo ◽  
Sung Hyun Kwon ◽  
Haisu Kang ◽  
Sungyu Choi ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Surface Properties ◽  
Catalyst Surface ◽  
Polymer Electrolyte Membrane ◽  
Pt Catalyst ◽  
Film Morphology ◽  
Electrolyte Membrane

Oxygenophilic ionic liquids promote the oxygen reduction reaction in Pt-free carbon electrocatalysts

2017 ◽  
Vol 4 (5) ◽  
pp. 895-899 ◽  
Author(s):  
Mo Qiao ◽  
Cheng Tang ◽  
Liviu Cristian Tanase ◽  
Cristian Mihail Teodorescu ◽  
Chengmeng Chen ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Polymer Electrolyte ◽  
Surface Properties ◽  
Polymer Electrolyte Membrane ◽  
Reduction Reaction ◽  
Alkaline Fuel Cells ◽  
Electrolyte Membrane

We propose a novel idea to improve the surface properties of carbon-based Pt-free electrocatalysts in Polymer Electrolyte Membrane Fuel Cells (PEMFCs) and Alkaline Fuel Cells (AFCs).

scholarly journals Enhanced Performance of Pt Nanoparticles on Ni-N Co-Doped Graphitized Carbon for Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cells

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 909
Author(s):  
Won-Suk Jung
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Pt Nanoparticles ◽  
Reduction Reaction ◽  
Graphitic Carbon ◽  
Pt Catalyst ◽  
Electrolyte Membrane

Since the reaction rate and cost for cathodic catalyst in polymer electrolyte membrane fuel cells are obstacles for commercialization, the high-performance catalyst for oxygen reduction reaction is necessary. The Ni encapsulated with N-doped graphitic carbon (Ni@NGC) prepared with ethylenediamine and carbon black is employed as an efficient support for the oxygen reduction reaction. Characterizations show that the Ni@NGC has a large surface area and mesoporous structure that is suitable to the support for the Pt catalyst. The catalyst structure is identified and the size of Pt nanoparticles distributed in the narrow range of 2–3 nm. Four different nitrogen species are doped properly into graphitic carbon structure. The Pt/Ni@NGC shows higher performance than the commercial Pt/C catalyst in an acidic electrolyte. The mass activity of the Pt/Ni@NGC in fuel cell tests exhibits over 1.5 times higher than that of commercial Pt/C catalyst. The Pt/Ni@NGC catalyst at low Pt loading exhibits 47% higher maximum power density than the Pt/C catalyst under H2-air atmosphere. These results indicate that the Ni@NGC as a support is significantly beneficial to improving activity.

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.

Effect of gas composition on Ru dissolution and crossover in polymer-electrolyte membrane fuel cells

2010 ◽  
Vol 195 (15) ◽  
pp. 4622-4627 ◽  
Author(s):  
Tommy T.H. Cheng ◽  
Nengyou Jia ◽  
Vesna Colbow ◽  
Silvia Wessel ◽  
Monica Dutta
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Gas Composition ◽  
Electrolyte Membrane
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