Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Hydrogen cars quickened by Copenhagen chemists

Abstract:
Green cars

Climate friendly fuel cells for hydrogen cars have come one step closer. Researchers at the Department of Chemistry, University of Copenhagen, have shown how to build fuel cells that produce as much electricity as current models, but require markedly less of the rare and valuable precious metal platinum. Their discovery was published in the highly reputable periodical Nature Materials.

Hydrogen cars quickened by Copenhagen chemists

Copenhagen, Denmark | Posted on July 22nd, 2013

Cheaper hydrogen cars with new fuel cell design

Fuel cells ought to replace internal combustion engines in our cars. They are better for the climate and for the environment. Partly because fuel cells use the fuel much more efficiently. Partly because they emit no smoke, no smog, no CO2.

Unfortunately the fuel cells have a technical limitation. They only work if they contain the metal platinum which is less common and more costly than gold. This has been a considerable obstacle to the development of the energy efficient power generators.

Reduced need for metal increases economic yield

Matthias Arenz is an associate professor at the Department of Chemistry, University of Copenhagen. In collaboration with researchers from the Technical University München and the Max Planck Institute for Iron Research in Düsseldorf he has built and tested a number of catalysts, the devices at the heart of a fuel cell. Arenz is confident that his discovery can show the way for economically viable fuel cell production.

-In the lab we have shown, that we can generate the same amount of electricity with just a fifth of the platinum. We don't expect to do quite that well in an everyday situation, but a marked reduction in platinum need is certainly realistic. And that will be a huge financial advantage.
One of the most costly elements

The precious metal platinum is one of the rarest elements on earth. Most of it is to be found in South Africa, where 80 percent of world production is mined while Russia extracts another ten percent. This means that the metal is strategically important.

In 2012 world production was 179 metric tons. By comparison gold production was 2.700 tons. And while the cost of platinum in 2010 was 1.600 dollars per Troy Ounce gold sold at just 1.300 dollars for a Troy Ounce.

Sheets, particles or nanoparticles

Fuel cells produce electricity from hydrogen and oxygen in a so called catalytic reaction which is kept going by platinum. The greatest effect is achieved by flowing your gasses over a sheet or film of platinum but that requires large amounts of the costly element. Instead modern fuel cells are made with particles, little granules, of platinum. What the research in Arenz' group showed was, that these granules could be placed more efficiently.

Five times more electricity for every gram of metal

When tested in the laboratory, catalysts bought on the market today will produce around one Ampere for every milligram of metal. The Arenz group developed a fuel cell catalyst that got a whopping eight Ampere per milligram of platinum. Their initial instinct was that they got a bigger power yield, because they had used smaller granules of platinum. But careful measurement revealed something much more surprising.

Unexpected effect discovered by chance

The key factor leading to platinum savings might never have been discovered by the group. They had produced a number of catalysts with varying sizes of platinum particles. By chance the particles were very tightly packed on a few of the sample catalysts and as it turned out, the packing of the particles was much more significant than the size. An effect, that the researchers have dubbed the "Particle Proximity Effect".

Next step will be to develop a chemical method to produce tightly packed catalysts on an industrial scale. Arenz has a few ideas for that as well, so he and his group have started applying for grants.

####

For more information, please click here

Contacts:
Associate Professor
Matthias Arenz
Telephone: +45 3532 0002 [Ring op: +45 3532 0002]


Press officer
Jes Andersen
Cell Phone: +45 30506582 [Ring op: +45 30506582]

Copyright © University of Copenhagen

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Leti to Offer Updates on Silicon Photonics Successes at OFC in LA February 27th, 2015

Moving molecule writes letters: Caging of molecules allows investigation of equilibrium thermodynamics February 27th, 2015

Untangling DNA with a droplet of water, a pipet and a polymer: With the 'rolling droplet technique,' a DNA-injected water droplet rolls like a ball over a platelet, sticking the DNA to the plate surface February 27th, 2015

Maximum Precision in 3D Printing: New complete solution makes additive manufacturing standard for microfabrication February 26th, 2015

Announcements

Leti to Offer Updates on Silicon Photonics Successes at OFC in LA February 27th, 2015

Moving molecule writes letters: Caging of molecules allows investigation of equilibrium thermodynamics February 27th, 2015

Untangling DNA with a droplet of water, a pipet and a polymer: With the 'rolling droplet technique,' a DNA-injected water droplet rolls like a ball over a platelet, sticking the DNA to the plate surface February 27th, 2015

Graphene shows potential as novel anti-cancer therapeutic strategy: University of Manchester scientists have used graphene to target and neutralise cancer stem cells while not harming other cells February 26th, 2015

Energy

In quest for better lithium-air batteries, chemists boost carbon's stability: Nanoparticle coatings improve stability, cyclability of '3DOm' carbon February 25th, 2015

New nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDs and solar cells February 25th, 2015

Learning by eye: Silicon micro-funnels increase the efficiency of solar cells February 25th, 2015

Magnetic nanoparticles enhance performance of solar cells X-ray study points the way to higher energy yields February 25th, 2015

Automotive/Transportation

In quest for better lithium-air batteries, chemists boost carbon's stability: Nanoparticle coatings improve stability, cyclability of '3DOm' carbon February 25th, 2015

New Paper-like Material Could Boost Electric Vehicle Batteries: Researchers create silicon nanofibers 100 times thinner than human hair for potential applications in batteries for electric cars and personal electronics February 20th, 2015

Researchers developed a cost-effective and efficient rival for platinum February 18th, 2015

Leading scholar presents advances in research of electric car batteries at AAAS February 16th, 2015

Fuel Cells

Review highlights the potential for graphene and other 2D crystals in the energy sector February 4th, 2015

New concept of fuel cell for efficiency and environment: It grasps both performance efficiency and removal of toxic heavy metal ions in direct methanol fuel cells January 5th, 2015

Toward a low-cost 'artificial leaf' that produces clean hydrogen fuel December 3rd, 2014

Single-atom gold catalysts may offer path to low-cost production of fuel and chemicals November 28th, 2014

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE