scholarly journals Characterization of Vapor Deposited, NanoStructured Membranes

2004 ◽  
Vol 822 ◽  
Author(s):  
Alan F. Jankowski ◽  
Nerine J. Cherepy ◽  
James. L. Ferreira ◽  
Jeffrey P. Hayes
Keyword(s):  
Electron Beam ◽  
Fuel Cells ◽  
High Performance ◽  
High Surface ◽  
Electron Beam Evaporation ◽  
Zinc Alloy ◽  
Molten Carbonate ◽  
Surface Areas ◽  
Copper Zinc ◽  
Nanostructured Membranes

AbstractThe vapor deposition methods of planar magnetron sputtering and electron-beam evaporation are used to synthesize materials with nanostructured morphological features that have ultra-high surface areas with continuous open porosity at the nanoscale. These nanostructured membranes are used in a variety of fuel cells to provide electrode and catalytic functions. Specifically, stand alone and composite nickel electrodes for use in thin film solid-oxide, and molten carbonate fuel cells are formed by sputter deposition and electron beam evaporation, respectively. Also, a potentially high-performance catalyst material for the direct reformation of hydrocarbon fuels at low temperatures is deposited as a nanostructure by the reactive sputtering of a copper-zinc alloy using a partial pressure of oxygen at an elevated substrate temperature.

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).

Powdery polymer and carbon aerogels with high surface areas for high-performance solid phase microextraction coatings

Nanoscale ◽  
2017 ◽  
Vol 9 (17) ◽  
pp. 5545-5550 ◽  
Author(s):  
Juan Zheng ◽  
Junlong Huang ◽  
Fei Xu ◽  
Fang Zhu ◽  
Dingcai Wu ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
High Performance ◽  
Solid Phase ◽  
High Surface ◽  
Carbon Aerogels ◽  
Surface Areas

A New Geometry High Performance Small Power MCFC

2004 ◽  
Vol 1 (1) ◽  
pp. 25-29 ◽  
Author(s):  
Franco Cotana ◽  
Federico Rossi ◽  
Andrea Nicolini
Keyword(s):  
Fuel Cells ◽  
Electric Power ◽  
High Temperatures ◽  
High Performance ◽  
Numerical Code ◽  
Cell Design ◽  
Molten Carbonate ◽  
Small Power ◽  
Molten Carbonate Fuel Cells ◽  
Simulation Results

Molten Carbonate Fuel Cells (MCFC) operate at temperatures ranging from 600 to 700°C; high temperatures allow to obtain low internal losses with large benefits in terms of generated electric power. A new geometry for small sized MCFCs is proposed in this paper. Cell thermofluidodynamic performance has been analyzed through a numerical code. Simulation results verified the suitability of the proposed cell design solutions. A stack consisting of three elementary units has been created in order to experimentally evaluate the proposed cell performance.

WRM ALLOY 4222

Alloy Digest ◽  
1999 ◽  
Vol 48 (9) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
High Performance ◽  
Good Combination ◽  
Zinc Alloy ◽  
Bend Strength ◽  
Typical Application ◽  
Rolling Mills ◽  
Copper Zinc ◽  
Forming Characteristics

Abstract WRM alloy 4222 is a copper-zinc alloy of the tin-brass family with a good combination of conductivity, strength, and forming characteristics. A typical application is in high-performance conductive springs. This datasheet provides information on composition, physical properties, tensile properties. and bend strength. It also includes information on forming. Filing Code: CU-639. Producer or source: Waterbury Rolling Mills Inc.

Enhanced visible-light photocatalytic hydrogen production activity of three-dimensional mesoporous p-CuS/n-CdS nanocrystal assemblies

2017 ◽  
Vol 4 (3) ◽  
pp. 433-441 ◽  
Author(s):  
Ioannis Vamvasakis ◽  
Adelais Trapali ◽  
Jianwei Miao ◽  
Bin Liu ◽  
Gerasimos S. Armatas
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
High Performance ◽  
Hydrogen Generation ◽  
High Surface ◽  
Three Dimensional ◽  
Surface Areas ◽  
Photocatalytic Hydrogen Generation ◽  
Production Activity ◽  
Visible Light Photocatalytic

Mesoporous assemblies of p-CuS/n-CdS nanocrystal junctions with high surface areas and uniform pores demonstrate a high performance and stability in photocatalytic hydrogen generation from water using visible light.

High performance microspherical activated carbons for methane storage and landfill gas or biogas upgrade

2014 ◽  
Vol 2 (37) ◽  
pp. 15337-15344 ◽  
Author(s):  
Ana S. Mestre ◽  
Cristina Freire ◽  
João Pires ◽  
Ana P. Carvalho ◽  
Moisés L. Pinto
Keyword(s):  
Packing Density ◽  
High Performance ◽  
Activated Carbons ◽  
High Surface ◽  
Landfill Gas ◽  
Methane Storage ◽  
Surface Areas

Microspherical K2CO3-activated carbons for methane storage or biogas upgrade: high surface areas and packing density, tuneable microporosity, and CO2–CH4 selectivity.

Application of electrolyte layers for solid oxide fuel cells by electron beam evaporation

2010 ◽  
Vol 181 (8-10) ◽  
pp. 447-452 ◽  
Author(s):  
S. Uhlenbruck ◽  
N. Jordan ◽  
J.M. Serra ◽  
H.P. Buchkremer ◽  
D. Stöver
Keyword(s):  
Electron Beam ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Electron Beam Evaporation ◽  
Solid Oxide ◽  
Oxide Fuel

From Flexible to Hard Polyurethane Aerogels: The Effect of Molecular Functionality vs. Molecular Rigidity

2012 ◽  
Vol 1403 ◽  
Author(s):  
Chakkaravarthy Chidambareswarapattar ◽  
Jared M. Loebs ◽  
Zachary J. Larimore ◽  
Patrick M. McCarver ◽  
Autumn M. Kosbar ◽  
...  
Keyword(s):  
High Performance ◽  
High Surface ◽  
Monomer Concentration ◽  
Design Rule ◽  
Dibutyltin Dilaurate ◽  
Surface Areas ◽  
Hyperbranched Polyurethane ◽  
Solid Nmr ◽  
Molecular Rigidity ◽  
Highly Porous

ABSTRACTHigh performance all-polymer aerogels are not only interesting for their low thermal conductivity, but also for their mechanical strength and their conversion to porous carbons. The prevalent design rule dictates that crosslinking at the monomer level decreases solubility of the developing polymer and induces phase separation of nanoparticles with high surface to volume ratios. Hence, hyperbranched structures based on trifunctional single aromatic core monomers should have enhanced interparticle connectivity and rigidity compared to those based on either difunctional or multiple aromatic core monomers. That design rule is applied here to hyperbranched polyurethane (PU) aerogels synthesized from tris(4-isocyanatophenyl)methane (TIPM) and 1,1,1-tris(4-hydroxyphenyl)ethane (HPE) in anhydrous acetone using dibutyltin dilaurate (DBTDL) as catalyst. The resulting materials vary from highly flexible to rigid as the monomer concentration increases. FTIR and 13C solid NMR confirm formation of urethane. SEM shows that the flexible variety is macroporous with a beaded worm-like structure, while the rigid variety is mesoporous and nanoparticulate. Lower-density flexible aerogels are highly porous (92%) with surface area of 132 m2 g-1, while the rigid ones have higher surface areas, up to 256 m2 g-1. Polyurethane aerogels from other triols and diols, e.g., phloroglucinol (POL) and resorcinol (RES), respectively, have also been studied and for similar monomer concentrations shrinkage and bulk density increases.

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