Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Graphene-based Catalyst Shows Promise for Fuel Cells

The graphene-based catalyst Fe-N-rGO has a much higher oxygen reduction reaction catalytic activity than those based on carbon black or oxidized carbon black.
The graphene-based catalyst Fe-N-rGO has a much higher oxygen reduction reaction catalytic activity than those based on carbon black or oxidized carbon black.

Abstract:
MIT scientists, doing part of their work on beamline X11 at the National Synchrotron Light Source, have made a promising graphene-based catalyst to improve fuel cells.

Graphene-based Catalyst Shows Promise for Fuel Cells

Upton, NY | Posted on January 3rd, 2012

Fuel cells convert hydrogen and oxygen into water, making electricity in the process. They are a source of quiet, efficient and clean energy, with the potential to replace combustion-based technologies in transportation and power applications. Starting in the 1960s, the U.S. put alkaline fuel cells on board spacecraft to produce electricity and water. Promising fuel-cell technologies of today include polymer-electrolyte-membrane fuel cells, also known as proton-exchange-membrane fuel cells (PEMFCs).

PEMFCs have the highest energy density of all fuel-cell types. They also have a relatively low operating temperature (ranging from 60-80 degrees Celsius), which means they warm up quickly - and begin generating electricity. That makes PEMFCs especially appealing for use in vehicles and in portable- and backup-power applications. Because they typically use platinum as a catalyst, however, the high cost of PEMFCs inhibits commercial development. To bring down the cost, research is focused on developing a non-precious-metal catalyst made of iron, nitrogen and carbon (Fe-N-C).

The team from MIT - Hye Ryung Byon, Jin Suntivich, and Yang Shao-Horn - prepared a graphene-based Fe-N-C catalyst (graphene is a monolayer of carbon) with high oxygen reduction reaction (ORR) activity, plus stability in acid. The method involves heat treatment of a mixture of Fe salt, graphitic carbon nitride and chemically reduced graphene (rGO).

The graphene-based catalyst exhibits reduction activity approaching those of the state-of-the-art, non-noble-metal catalysts reported to date, which highlights the opportunities of using the unusual surface chemistry of rGO to create active Fe-N sites and develop an improved catalyst.

Our approach is uniquely different from other groups," said MIT's Yang Shao-Horn, who is the Gail E. Kendall Associate Professor of Mechanical Engineering at the university. "We start from molecular building blocks and precisely control the surface chemistry of graphene as we build the catalyst."

The researchers examined the surface chemical composition of Fe-N-rGO by x-ray photoelectron spectroscopy (XPS) and studied the atomic coordination of Fe by extended x-ray absorption fine structure (EXAFS). XPS and EXAFS of the Fe-N-rGO sample provided evidence for the incorporation of Fe ion and N into the rGO upon annealing.

Characterizing the Fe-N functionalization is experimentally very difficult, explained Shao-Horn, and x-ray absorption is one of the few techniques that can accomplish this task. "We use the X11 beamline at NSLS, where we have excellent support," she added. "We are extremely fortunate to have this collaboration."

According to Shao-Horn, ongoing work includes examination of Fe-N-rGo's performance and lifetime in a more realistic fuel-cell configuration.

####

About Brookhaven National Laboratory
One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE's Office of Science by Brookhaven Science Associates, a limited-liability company founded by the Research Foundation of State University of New York on behalf of Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit, applied science and technology organization.

For more information, please click here

Contacts:
Mona S. Rowe

Copyright © Brookhaven National Laboratory

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

Detecting Cancer Earlier is Goal of Rutgers-Developed Medical Imaging Technology: Rare earth nanocrystals and infrared light can reveal small cancerous tumors and cardiovascular lesions October 21st, 2014

Nitrogen Doped Graphene Characterized by Iranian, Russian, German Scientists October 21st, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

Graphene

Nitrogen Doped Graphene Characterized by Iranian, Russian, German Scientists October 21st, 2014

Graphenea opens US branch October 16th, 2014

Laboratories

HP Supercomputer at NREL Garners Top Honor October 19th, 2014

ORNL research reveals unique capabilities of 3-D printing October 15th, 2014

Scientists Map Key Moment in Assembly of DNA-Splitting Molecular Machine: Crucial steps and surprising structures revealed in the genesis of the enzyme that divides the DNA double helix during cell replication October 15th, 2014

Govt.-Legislation/Regulation/Funding/Policy

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

HP Supercomputer at NREL Garners Top Honor October 19th, 2014

First Canada Excellence Research Chair gets $10 million from the federal government for oilsands research at the University of Calgary: Federal government announces prestigious research chair to study improving oil production efficiency October 19th, 2014

Announcements

Detecting Cancer Earlier is Goal of Rutgers-Developed Medical Imaging Technology: Rare earth nanocrystals and infrared light can reveal small cancerous tumors and cardiovascular lesions October 21st, 2014

Nitrogen Doped Graphene Characterized by Iranian, Russian, German Scientists October 21st, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

Fuel Cells

Unique catalysts for hydrogen fuel cells synthesized in ordinary kitchen microwave oven October 14th, 2014

Researchers Pump Up Oil Accumulation in Plant Leaves: Method could greatly boost energy content of crops grown for fuel October 8th, 2014

Platinum meets its match in quantum dots from coal: Rice University's cheap hybrid outperforms rare metal as fuel-cell catalyst October 1st, 2014

Iranian Researchers Synthesize Stable Ceramic Nanopowders at Room Temperature September 20th, 2014

Research partnerships

Detecting Cancer Earlier is Goal of Rutgers-Developed Medical Imaging Technology: Rare earth nanocrystals and infrared light can reveal small cancerous tumors and cardiovascular lesions October 21st, 2014

Nitrogen Doped Graphene Characterized by Iranian, Russian, German Scientists October 21st, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

IRLYNX and CEA-Leti to Streamline New CMOS-based Infrared Sensing Modules Dedicated to Human-activities Characterization October 15th, 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 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE