Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Conducting Tubes

Abstract:
Carbonized titanium dioxide nanotubes with semimetallic properties increase the efficiency of methanol fuel cells

Conducting Tubes

Germany & Finland | Posted on September 8th, 2009

Mention of nanotubes usually means carbon nanotubes. But not all tiny tubes are made of carbon. For example, layers made of nanoscopic titanium dioxide have proven to be useful materials for biotechnology, catalytic converters, and solar cell technology. Although the semiconducting properties of these nanotubes are critical for many of these applications, their limited conductivity represents a hindrance for other areas of application. A team at the University of Erlangen-Nürnberg and the University of Turku in Finland has now found an easy way to breathe some metal-like conductivity into the nanotubes without changing their structure. Through carbonization, the titanium dioxide can be converted into a carbon-containing titanium oxycarbide compound. As the researchers led by Patrik Schmuki report in the journal Angewandte Chemie, this novel material could drastically increase theefficiency of methanol fuel cells.

In order to carbonize titanium dioxide nanotubes, the researchers treated them with acetylene at 850 °C. This forms a carbon-rich compound with semimetallic properties, which is also significantly harder than before carbonization. "This is not about simply doping titanium dioxide with carbon atoms," clarifies Schmuki. "Although the ordered tube structures remain almost completely unchanged, a new chemical compound is formed. This titanium oxycarbide can be interpreted as a solid mixture of titanium carbide and various titanium oxides." Its high electrical conductivity and favorable electrochemical characteristics make this new material an interesting new electrode material.

Its use in methanol fuel cells seems particularly attractive. These days, methanol oxidation is usually carried out at catalytic electrodes with a carbon support and a platinum or ruthenium catalyst. "Titanium dioxide nanotubes have been under consideration as an alternative to the carbon support for a number of years," says Schmuki. "But our new conducting oxycarbide beats these by a mile: Supports made of the oxycarbide increase the activity of the catalyst for the methanol oxidation by 700 %."

More information: Patrik Schmuki, Semimetallic TiO2 Nanotubes, Angewandte Chemie International Edition 2009, 48, No. 39, 7236-7239, doi: 10.1002/anie.200902207


Author: Patrik Schmuki, Carbonisierte
Titandioxidnanoröhrchen mit halbmetallischen
Eigenschaften steigern die Leistung von
Methanol-Brennstoffzellen,

www.lko.uni-erlangen.de/En/Frames/overview-frame.html

####

About Wiley InterScience
Wiley InterScience (www.interscience.wiley.com) provides access to over 3 million articles across nearly 1500 journals and 7000 Online Books and major reference works. It also holds industry leading databases such as The Cochrane Library, chemistry databases and the acclaimed Current Protocols laboratory manuals.

For more information, please click here

Contacts:
Contact: Editorial office:



or Amy Molnar (US):
or

Jennifer Beal (UK):
or

Alina Boey (Asia)

Copyright © Wiley InterScience

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

Hybrid nanoantennas -- next-generation platform for ultradense data recording April 28th, 2016

Superfast light source made from artificial atom April 28th, 2016

Arrowhead Pharmaceuticals Files for Regulatory Clearance to Begin Phase 1/2 Study of ARC-521 April 28th, 2016

The Translational Research Center at the University Hospital of Erlangen in Germany uses the ZetaView from Particle Metrix to quantify extracellular vesicles such as exosomes April 28th, 2016

Nanotubes/Buckyballs/Fullerenes

NREL finds nanotube semiconductors well-suited for PV systems April 27th, 2016

Researchers create artificial protein to control assembly of buckyballs April 27th, 2016

Cleaning up hybrid battery electrodes improves capacity and lifespan: New way of building supercapacitor-battery electrodes eliminates interference from inactive components April 22nd, 2016

Nature Photonics: Light source for quicker computer chips: Waveguide with integrated carbon nanotubes for conversion of electric signals into light / quicker computer chips are feasible / publication in Nature Photonics April 21st, 2016

Announcements

Hybrid nanoantennas -- next-generation platform for ultradense data recording April 28th, 2016

Superfast light source made from artificial atom April 28th, 2016

Arrowhead Pharmaceuticals Files for Regulatory Clearance to Begin Phase 1/2 Study of ARC-521 April 28th, 2016

The Translational Research Center at the University Hospital of Erlangen in Germany uses the ZetaView from Particle Metrix to quantify extracellular vesicles such as exosomes April 28th, 2016

Energy

NREL finds nanotube semiconductors well-suited for PV systems April 27th, 2016

Researchers create artificial protein to control assembly of buckyballs April 27th, 2016

Flipping a chemical switch helps perovskite solar cells beat the heat April 26th, 2016

New spin Seebeck thermoelectric device with higher conversion efficiency created April 26th, 2016

Fuel Cells

Ruthenium nanoframes open the doors to better catalysts April 4th, 2016

Saving sunshine for a rainy day: New catalyst offers efficient storage of green energy: Team led by U of T Engineering designs world's most efficient catalyst for storing energy as hydrogen by splitting water molecules March 28th, 2016

Carbon leads the way in clean energy: Groundbreaking research at Griffith University is leading the way in clean energy, with the use of carbon as a way to deliver energy using hydrogen March 23rd, 2016

Physicists prove energy input predicts molecular behavior: Theoretical proof could lead to more reliable nanomachines March 22nd, 2016

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







Car Brands
Buy website traffic