Performance of thin-film cathodes for proton-exchange-membrane fuel cells based on high-surface-area carbon supports

2007 ◽  
Vol 171 (1) ◽  
pp. 8-17 ◽  
Author(s):  
G.J.M. Janssen ◽  
E.F. Sitters
Keyword(s):  
Thin Film ◽  
Fuel Cells ◽  
Surface Area ◽  
Proton Exchange Membrane ◽  
High Surface ◽  
High Surface Area ◽  
Proton Exchange ◽  
Carbon Supports ◽  
Exchange Membrane

scholarly journals Atomically Dispersed M-N-C Catalysts in Proton Exchange Membrane Fuel Cells: Recent Progress and Perspectives

2021 ◽  
Vol 308 ◽  
pp. 01019
Author(s):  
Haoran Kong ◽  
Jiarong Liu ◽  
Yu Yue
Keyword(s):  
Fuel Cells ◽  
Cost Effectiveness ◽  
Proton Exchange Membrane ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Proton Exchange ◽  
Synthesis Methods ◽  
Zeolitic Imidazolate Framework ◽  
Exchange Membrane

The selection of oxygen reduction reaction (ORR) catalysts plays a key role in enhancing the performance of proton exchange membrane fuel cells (PEMFCs). To optimize the energy conversion technology in PEMFCs and improve the cost-effectiveness of ORR catalysts, atomically dispersed metal-nitrogen-carbon (M-N-C) catalyst is regarded as one of the most promising materials to replace Pt-based catalysts. In this review, we summarize the advantages of atomically dispersed M-N-C catalysts in both physical and chemical properties, including controllable dimensions, ease of accessibility, high surface area and excellent conductivity. Additionally, the unique merits of their cost-effectiveness are also described by a concise comparison with other ORR catalysts. Subsequently, some of its main synthesis methods are based on the most commonly used zeolitic imidazolate framework (ZIF) precursor. Several other precursors involve carbon, nitrogen, and one or more active transition metals (mainly iron or cobalt) are introduced briefly. Although there are a variety of synthesis methods, all these methods are in line with pyrolysis technology. Then, the recent advancements of atomically dispersed M-N-C catalysts related to their development and application of Fe-N-C, Mn-N-C, and Co-N-C catalysts are comprehensively described. Finally, based on some common M-N-C catalysts, many improvement ideas are also proposed. The focus is on how to control the negative reaction in Fe-N-C catalysts, improve the activity of Co-N-C catalysts and Mn-N-C catalysts, and find more suitable transition metal materials to prepare M-N-C catalysts.

scholarly journals Highly Mesoporous Carbon Aerogel as Catalyst Support in Proton Exchange Membrane Fuel Cells

2019 ◽  
Author(s):  
Kevin Gu ◽  
Eric J. Kim ◽  
Sunil K. Sharma ◽  
Keyword(s):  
Fuel Cells ◽  
Activated Carbon ◽  
Specific Surface ◽  
Surface Area ◽  
Mesoporous Carbon ◽  
Proton Exchange Membrane ◽  
Catalyst Support ◽  
Carbon Aerogel ◽  
Proton Exchange ◽  
Exchange Membrane

<p>Carbon aerogel possesses unique structural and electrical properties, such as high mesopore volume, specific surface area, and electrical conductivity, which make it suitable for use as a catalyst support in Proton Exchange Membrane Fuel Cells (PEMFC). In this study, we present a novel synthesis of highly mesoporous carbon aerogel via ambient-drying and investigate its application in PEMFCs. The structural effects of activation on carbon aerogel were also studied. The TEM, XRF, Non Localized Density Function Theory (NLDFT) and BJH analysis were carried out to observe the morphology and pore structure. Pt on carbon aerogel and activated carbon aerogel show efficient activity in both oxygen reduction and hydrogen oxidation reactions compared to Pt on Vulcan XC-72, with increases up to 715% and 195% in specific power density, respectively. The enhanced performance of carbon aerogel is attributed to its large specific surface area and high mesopore to micropore ratio. Accelerated stress tests show that carbon aerogel has comparable durability with Vulcan XC-72, while activated carbon aerogel is less durable than both materials. Thus, the mesoporous carbon aerogel provides an efficient, lower-cost alternative to existing microporous carbon material as a catalyst support in PEMFCs.</p><p></p>

scholarly journals Surface area loss mechanisms of Pt3Co nanocatalysts in proton exchange membrane fuel cells

2017 ◽  
Vol 343 ◽  
pp. 571-579 ◽  
Author(s):  
S. Rasouli ◽  
R.A. Ortiz Godoy ◽  
Z. Yang ◽  
M. Gummalla ◽  
S.C. Ball ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Surface Area ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Area Loss ◽  
Exchange Membrane ◽  
Loss Mechanisms
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