Spontaneous formation of nanoparticles on electrospun fibers for fuel cell electrodes

2018 ◽  
Author(s):  
Norbert Radacsi ◽  
Fernando Diaz Campos ◽  
Calum Chisholm ◽  
Konstantinos P. Giapis
Keyword(s):  
Fuel Cell ◽  
Surface Area ◽  
State Of The Art ◽  
High Surface ◽  
High Surface Area ◽  
Cell Voltage ◽  
Dihydrogen Phosphate ◽  
Large Area ◽  
Fuel Cell Electrodes ◽  
Electrolyte Surface

Nanofibers spontaneously decorated with nanoparticles were synthesized by nozzle-free electrospinning, showcasing the latter as a novel, inexpensive and scalable method for depositing high-surface area composites. Layers of nanofibers of the intermediate-temperature proton conducting electrolyte cesium dihydrogen phosphate, (CsH2PO4, CDP), were deposited from homogeneous undersaturated solutions of CDP and polyvinylpyrrolidone (PVP), uniformly over large area substrates. Under certain conditions, the nanofibers develop CDP nanoparticles on their surface, which increases the exposed electrolyte surface area and ultimately enhances electrocatalytic performance. Indeed, fuel cell tests on cathodes made of processed nanoparticle-decorated CDP nanofibers produced higher cell voltage, as compared to state-of-the-art electrodes.

High Surface Area Molybdenum Nitride Support for Fuel Cell Electrodes

2011 ◽  
Vol 158 (10) ◽  
pp. B1255 ◽  
Author(s):  
K. J. Blackmore ◽  
L. Elbaz ◽  
E. Bauer ◽  
E. L. Brosha ◽  
K. More ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Molybdenum Nitride ◽  
Fuel Cell Electrodes

scholarly journals Nano metal fluorides: small particles with great properties

ChemTexts ◽  
2020 ◽  
Vol 6 (3) ◽  
Author(s):  
Erhard Kemnitz ◽  
Stefan Mahn ◽  
Thoralf Krahl
Keyword(s):  
Surface Area ◽  
State Of The Art ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Chemical Properties ◽  
Lewis Acidity ◽  
Small Particles ◽  
Specific Chemical ◽  
Metal Fluorides

Abstract The recently developed fluorolytic sol–gel route to metal fluorides opens a very broad range of both scientific and technical applications of the accessible high surface area metal fluorides, many of which have already been applied or tested. Specific chemical properties such as high Lewis acidity and physical properties such as high surface area, mesoporosity and nanosize as well as the possibility to apply metal fluorides on surfaces via a non-aqueous sol make the fluorolytic synthesis route a very versatile one. The scope of its scientific and technical use and the state of the art are presented.

Growth of Carbon Nanotubes on Carbon Toray Paper for Bio-Fuel Cell Applications

2007 ◽  
Author(s):  
Bhupesh Chandra ◽  
Joshua T. Kace ◽  
Yuhao Sun ◽  
S. C. Barton ◽  
James Hone
Keyword(s):  
Carbon Nanotubes ◽  
Fuel Cell ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Multiwall Carbon Nanotubes ◽  
Volume Ratio ◽  
Carbon Paper ◽  
Heating Process ◽  
Scale Production

In recent years carbon nanotubes have emerged as excellent materials for applications in which high surface area is required e.g. gas sensing, hydrogen storage, solar cells etc. Ultra-high surface to volume ratio is also a desirable property in the applications requiring enhanced catalytic activity where these high surface area materials can act as catalyst supports. One of the fastest developing areas needing such materials is fuel-cell. Here we investigate the process through which carbon nanotubes can be manufactured specifically to be used to increase the surface area of a carbon paper (Toray™). This carbon support is used in bio-catalytic fuel cell as an electrode to support enzyme which catalyzes the redox reaction. Deposition of nanotubes on these carbon fibers can result in great enhancement in the overall surface area to support the enzyme, which increases the reaction rate inside the fuel cell. The present paper describes a method to achieve ultra-thick growth of multiwall carbon nanotubes (MWNT) on a carbon Toray™ paper using a joule heating process and gas-phase catalyst. Using this method, we are able to achieve rapid, high-density, and uniform MWNT growth. This method is also potentially scalable toward larger-scale production.

scholarly journals A Review of the State of the Art towards Biological Applications of Graphene-based Nanomaterials

2021 ◽  
pp. 216-230
Author(s):  
Varun Kumar Sharma ◽  
Mohd Yusuf ◽  
Prem Kumar ◽  
. Sheeba ◽  
. Nafisa ◽  
...  
Keyword(s):  
Gene Delivery ◽  
Surface Area ◽  
Recent Progress ◽  
State Of The Art ◽  
High Surface ◽  
High Surface Area ◽  
The State ◽  
Biological Applications ◽  
The Past ◽  
Delivery Vehicles

The field of nanoscience has evolved into a wide variety of successes over the past two decades and the emphasis on nanotechnology is to revolve around various dynamic fields, such as sensor, biomedical, and many useful applications. Advances in related fields are certainly due to the ability to synthesize nanoparticles from a variety of materials, structures, and to convert samples into complex nanoarchitectures. The promises of nanomedicine are broad. Graphene (Gr), the first 2-dimensional material to stand alone, is a type of new nanomaterial that leads to the excitement of natural biological applications. Number of researches has been conducted on applicability of GBNs in the area of environment, biomedical, and healthcare sectors. As compared to other nanomaterials, extraordinary properties of graphene-based nanomaterials (GBNs) like high surface area, multilayers, multifunctional and excellent biocompatibility make them capable to play great roll of highly-tailored multifunctional delivery vehicles for drugs delivery, gene delivery, phototherapy and bioimaging. However, research communities performed plenty of research works on GBNs synthesis and biological acitivity evaluation, but  there is limited comprehensive reviews published so far biological applications. So, we have studied a large number of scientific reports and investigations, presented in this review describing recent progress and modern perspectives with respect to graphene and related nanomaterials for biological applications.

Surfactant free synthesis of high surface area Pt@PdM3 (M = Mn, Fe, Co, Ni, Cu) core/shell electrocatalysts with enhanced electrocatalytic activity and durability for PEM fuel cell applications

2016 ◽  
Vol 40 (10) ◽  
pp. 8681-8695 ◽  
Author(s):  
Karuppannan Mohanraju ◽  
Govindarajan Kousik ◽  
Louis Cindrella
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Surface Area ◽  
Electrocatalytic Activity ◽  
High Surface ◽  
High Surface Area ◽  
Pem Fuel Cell ◽  
Core Shell ◽  
Oxygen Reduction Reactions ◽  
Shell Nanostructures

High surface area core/shell nanostructures of Pt covered Pd alloys were synthesized and they exhibited enhanced electrocatalytic activity in oxygen reduction reactions.

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