#Researchers synthesize new thin-film material for use in fuel cells: Article in the journal APL Materials shows how to grow Bi2pt2o7 pyrochlore, potentially a more effective cathode for future fuel cells Abstract:
Researchers from Cornell University have synthesized a new thin-film catalyst for use in fuel cells. In a paper published March 10 in the journal APL Materials, from AIP Publishing, the team reports the first-ever epitaxial thin-film growth of Bi2pt2o7 pyrochlore,
which could act as a more effective cathode--a fundamental electrode component of fuel cells from which positive current flows through an external circuit delivering electric power."
"Up to now, research on oxygen catalysts in thin film form for clean energy applications has been focused on the perovskite-structured oxides
"The much less studied cubic pyrochlore structure is an appealing alternative to perovskites for such applications as fuel cell cathodes."
Epitaxial thin films can actually act as more efficient fuel cell catalysts than nanocrystalline powder, but growing Bi2pt2o7 directly as a film requires oxidizing the platinum metal--a challenging step.
thought to be one of the most promising oxide catalysts for fuel cell applications, "said Gutierrez-Llorente.
The cathode of a solid oxide fuel cell electrochemically reduces oxygen. Bi2pto7's oxygen-deficient structure makes it an ideal catalyst for the process.
Synthesizing the material as a thin film instead of as a bulk powder opens up new possibilities for fuel cell technology."
Aerogel catalyst shows promise for fuel cells March 2nd, 2015scientific breakthrough in rechargeable batteries: Researchers from Singapore and Qubec Team up to Develop Next-Generation Materials to Power Electronic devices and Electric vehicles February 28th,
They are used also in other industries to manufacture fuel cells, batteries, filters and light-emitting screens."
2015laboratories NIST's'nano-raspberries'could bear fruit in fuel cells June 9th, 2015mesoporous Particles for the Development of Drug Delivery System Safe to Human bodies June 9th,
2015nist's'nano-raspberries'could bear fruit in fuel cells June 9th, 2015filming the film: Scientists observe photographic exposure live at the nanoscale:
2015investigation of Optical Properties of Quantum dots in Presence of Magnetic, Electrical Fields June 10th, 2015nist's'nano-raspberries'could bear fruit in fuel cells June 9th, 2015filming the film:
for example, in lambda sensors of automotive catalytic converters and solid oxide fuel cells. The ETH professor is convinced that the industrial importance of these materials will even further increase-for example, in gas sensors, new classes of data storage and computer circuits,
"Even in earlier experiments, scientists noticed that power generation in micro solid oxide fuel cells varies greatly depending on the structure of such cells.
This supports the development of future gas sensors, ion-based data storage and micro energy converters, such as fuel cells-and potentially a range of other as yet unknown applications in the promising field of ionics.##
Hydrogels block harmful oxygen June 15th, 2015nist's'nano-raspberries'could bear fruit in fuel cells June 9th, 2015unlocking nanofibers potential:
The results demonstrate a powerful operando technique--from the Latin for"in working condition"--that may revolutionize research on catalysts, batteries, fuel cells,
including batteries and fuel cells.""We are seeing the emergence of a very powerful and versatile technique that leverages both NSLS-II
New non-platinum and nanosized catalyst for polymer electrolyte fuel cell Abstract: Canadelectrochim have discovered a new non-platinum and nano-sized catalyst for the fuel cell based on Mother Nature
which mimics the plant leaf. PEMFC as an optimal solution for the future energy economypolymer electrolyte membrane or proton exchange membrane fuel cell (PEMFC), where chemical energy is converted directly to electrical energy,
provides a highly efficient alternative to a standard internal combustion engine. High power density, clean emissions (water), low temperature operation, rapid start-up and shutdown,
and ability to use fuels from renewable sources are several reason why fuel cells such as PEMFC have attracted attention for large market applications,
It is known that splitting a hydrogen molecule at the anode of fuel cell using platinum is relatively easy.
splitting the oxygen molecule at the cathode of fuel cell (oxygen reduction reaction(,ORR)) is more difficult
and this causes significant polarization losses (lowers efficiency of the fuel cell). An appropriate catalyst for this process has not been discovered
2). Fuel cells generate electricity by combining hydrogen gas with oxygen to produce water (figure 1). Although that sounds perfectly clean and green,
it can poison the platinum catalysts that are important to driving the fuel cell. In the heart of a fuel cell, CO binds tightly to platinum
and prevents it from grabbing hydrogen, the first step in the reaction.)However, Hydrogen produced from water splitting by photosynthesis is very clean
they would short circuit the current in the fuel cell and fuel cell degradation occurs. Advancements in the electrolyte system of PEMFCTHE commercial development of a special electrolyte (single ion conducting polymer electrolyte) changed the field of electrochemical devices in a significant way.
Electrochemists have spent many years in a continuing search for newer, more highly conducting (ions and not electrons) and a more electrochemically stable electrolyte system.
In the direction of operating the fuel cell using a cost effective and non-platinum based catalyst,
Alberta had presented a mechanism for the fuel cell reaction based on Mother Nature which mimics the plant leaf.
Based on this mechanism the reaction of the fuel cell does not require platinum. References 1 Hydrogen
Fuel cells & Infrastructure Technologies Program Multi-Year Research, Development and Demonstration Plan, U s. Department of energy, October 2007.2 Hydrogen fuel Cells & Infrastructure Technologies Program Multi
-Year Research, Development and Demonstration Plan, U s. Department of energy, October 2007.3 M. Doyle and G. Rajendran, Chapter 10, Handbook of fuel cell, edited by W. Vielstich, Volume 3:
Fuel cell technology and Applications, John Wiley Ltd. 2003)##For more information, please click herecontacts: M. Redaphone:
Hydrogels block harmful oxygen June 15th, 2015nist's'nano-raspberries'could bear fruit in fuel cells June 9th, 201 2
or combusted in fuel cells-in cars for example-to drive engines. Solar fuel cell To connect an existing silicon solar cell to a battery that splits the water may well be an efficient solution now
-so you then actually have a fuel cell in which you can temporarily store your solar energy.
#'Nano-raspberries'could bear fruit in fuel cells (Nanowerk News) Researchers at the National Institute of Standards
which offers high surface area for catalyzing reactions in fuel cells. Individual particles are 3-4 nm in diameter
Curtin/NIST)( click on image to enlarge) The research could help make fuel cells more practical.
Nanoparticles can act as catalysts to help convert methanol to electricity in fuel cells. NIST's 40-minute process for making nano-raspberries, described in a new paper,*has several advantages.
For fuel cells, nanoparticles often are mixed with solvents to bind them to an electrode. To learn how such formulas affect particle properties,
For applications such as liquid methanol fuel cells, catalyst particles should remain separated and dispersed in the liquid,
and highly anisotropic directionally dependent proton conducting behaviors in porous CB 6 for fuel cell electrolytes.
"The research focused on a class of oxides called perovskites that are of interest for applications such as gas sensing, water purification, batteries, and fuel cells.
This hydrogen can be stored in fuel cells that power the system when the light is too low for the power cells.
-so you then actually have a fuel cell in which you can temporarily store your solar energy.
Running fuel cells on bacteria Researchers in Norway have succeeded in getting bacteria to power a fuel cell.
Nature's own generator The biological fuel cell is powered by entirely natural processes--with the help of living microorganisms."
"In simple terms, this type of fuel cell works because the bacteria consume the waste materials found in the water,
The lightweight lithium-polymer hybrid fuel cell that converts the hydrogen gas into electricity to power the rotors was developed by a sister company,
because batteries and fuel cells simply aren practical. The process developed at EBI can be used to selectively upgrade alkyl methyl ketones derived from sugarcane biomass into trimer condensates with better than 95-percent yields.
which is stored then in fuel cells for future use. However, hydrogen has succeeded not yet in marking its prominent presence as an energy source
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