Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > ORNL-grown oxygen ‘sponge’ presents path to better catalysts, energy materials

This schematic depicts a new ORNL-developed material that can easily absorb or shed oxygen atoms.
This schematic depicts a new ORNL-developed material that can easily absorb or shed oxygen atoms.

Abstract:
Scientists at the Department of Energy's Oak Ridge National Laboratory have developed a new oxygen "sponge" that can easily absorb or shed oxygen atoms at low temperatures. Materials with these novel characteristics would be useful in devices such as rechargeable batteries, sensors, gas converters and fuel cells.

ORNL-grown oxygen ‘sponge’ presents path to better catalysts, energy materials

Oak Ridge, TN | Posted on August 28th, 2013

Materials containing atoms that can switch back and forth between multiple oxidation states are technologically important but very rare in nature, says ORNL's Ho Nyung Lee, who led the international research team that published its findings in Nature Materials.

"Typically, most elements have a stable oxidation state, and they want to stay there," Lee said. "So far there aren't many known materials in which atoms are easily convertible between different valence states. We've found a chemical substance that can reversibly change between phases at rather low temperatures without deteriorating, which is a very intriguing phenomenon."

Many energy storage and sensor devices rely on this valence-switching trick, known as a reduction-oxidation or "redox" reaction. For instance, catalytic gas converters use platinum-based metals to transform harmful emissions such as carbon monoxide into nontoxic gases by adding oxygen. Less expensive oxide-based alternatives to platinum usually require very high temperatures -- at least 600 to 700 degrees Celsius -- to trigger the redox reactions, making such materials impractical in conventional applications.

"We show that our multivalent oxygen sponges can undergo such a redox process at as low as 200 degrees Celsius, which is comparable to the working temperature of noble metal catalysts," Lee said. "Granted, our material is not coming to your car tomorrow, but this discovery shows that multivalent oxides can play a pivotal role in future energy technologies."

The team's material consists of strontium cobaltite, which is known to occur in a preferred crystalline form called brownmillerite. Through an epitaxial stabilization process, the ORNL-led team discovered a new recipe to synthesize the material in a more desirable phase known as perovskite. The researchers have filed an invention disclosure on their findings.

"These two phases have very distinct physical properties," Lee said. "One is a metal, the other is an insulator. One responds to magnetic fields, the other does not -- and we can make it switch back and forth within a second at significantly reduced temperatures."

The international team's design and testing of this novel advanced material from scratch required multidisciplinary expertise and sophisticated tools from such places as Argonne National Laboratory and ORNL, including Argonne's Advanced Photon Source and ORNL's Center for Nanophase Materials Science, says Lee.

"As we showed in this study, only through the study of a well-defined system can we build a framework for the design of next generation energy materials," said coauthor John Freeland of Argonne. "This insight was made possible by merging the capabilities at Oak Ridge and Argonne national labs for advanced synthesis and characterization of novel materials."

The study, "Reversible redox reactions in an epitaxially stabilized SrCoOx oxygen sponge," involved ORNL's Hyoungjeen Jeen, Woo Seok Choi, Matthew Chisholm, Michael Biegalski and Dongwon Shin; Argonne's Chad Folkman, I-Cheng Tung, Dillon Fong and John Freeland; and Hokkaido University's Hiromichi Ohta.

The work was supported by DOE's Office of Science.

The Advanced Photon Source at Argonne National Laboratory is one of five national synchrotron radiation light sources supported by the U.S. Department of Energy's Office of Science to carry out applied and basic research to understand, predict, and ultimately control matter and energy at the electronic, atomic, and molecular levels, provide the foundations for new energy technologies, and support DOE missions in energy, environment, and national security. To learn more about the Office of Science X-ray user facilities, visit the user facilities directory.

The Center for Nanophase Materials Science is one of five DOE Nanoscale Science Research Centers (NSRCs), national user facilities for interdisciplinary research at the nanoscale, supported by the DOE Office of Science. Together the NSRCs comprise a suite of complementary facilities that provide researchers with state-of-the-art capabilities to fabricate, process, characterize and model nanoscale materials, and constitute the largest infrastructure investment of the National Nanotechnology Initiative. The NSRCs are located at DOE's Argonne, Brookhaven, Lawrence Berkeley, Oak Ridge and Sandia and Los Alamos National Laboratories. For more information about the DOE NSRCs, please visit science.energy.gov.

####

About DOE/Oak Ridge National Laboratory
ORNL is managed by UT-Battelle for the Department of Energy's Office of Science. DOE's Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit science.energy.gov.

For more information, please click here

Contacts:
Morgan McCorkle

865-574-7308

Copyright © DOE/Oak Ridge 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

MEMS chips get metatlenses: Combining metasurface lenses with MEMS technology could add high-speed scanning and enhance focusing capability of optical systems February 21st, 2018

Atomic structure of ultrasound material not what anyone expected February 21st, 2018

Oxford Instruments announces Dr Kate Ross as winner of the 2018 Lee Osheroff Richardson Science Prize for North and South America February 20th, 2018

Computers aid discovery of new, inexpensive material to make LEDs with high color quality February 20th, 2018

Chemistry

Ultra-efficient removal of carbon monoxide using gold nanoparticles on a molecular support: New method and mechanism for state-of-the-art gas purification February 9th, 2018

Fast-spinning spheres show nanoscale systems' secrets: Rice University lab demonstrates energetic properties of colloids in spinning magnetic field February 7th, 2018

New filters could enable manufacturers to perform highly-selective chemical separation January 23rd, 2018

Laboratories

Atomic Flaws Create Surprising, High-Efficiency UV LED Materials: Subtle surface defects increase UV light emission in greener, more cost-effective LED and catalyst materials February 8th, 2018

Thanks for the memory: NIST takes a deep look at memristors January 20th, 2018

Govt.-Legislation/Regulation/Funding/Policy

Computers aid discovery of new, inexpensive material to make LEDs with high color quality February 20th, 2018

Arrowhead Receives Regulatory Clearance to Begin Phase 1/2 Study of ARO-HBV for Treatment of Hepatitis B February 15th, 2018

Arrowhead Pharmaceuticals Receives Orphan Drug Designation for ARO-AAT February 15th, 2018

Rutgers-Led Innovation Could Spur Faster, Cheaper, Nano-Based Manufacturing: Scalable and cost-effective manufacturing of thin film devices February 14th, 2018

Sensors

Graphene on toast, anyone? Rice University scientists create patterned graphene onto food, paper, cloth, cardboard February 13th, 2018

Leti Chief Scientist Barbara De Salvo Will Help Kick Off ISSCC 2018 with Opening-Day Keynote: In Addition, Leti Scientists Will Present and Demo New Technology for Piezoelectric Energy Harvesting February 8th, 2018

Engineers develop flexible, water-repellent graphene circuits for washable electronics January 24th, 2018

Leti to Demo New Curving Technology at Photonics West that Improves Performance of Optical Components January 18th, 2018

Discoveries

MEMS chips get metatlenses: Combining metasurface lenses with MEMS technology could add high-speed scanning and enhance focusing capability of optical systems February 21st, 2018

Atomic structure of ultrasound material not what anyone expected February 21st, 2018

Computers aid discovery of new, inexpensive material to make LEDs with high color quality February 20th, 2018

Unconventional superconductor may be used to create quantum computers of the future: They have probably succeeded in creating a topological superconductor February 19th, 2018

Announcements

MEMS chips get metatlenses: Combining metasurface lenses with MEMS technology could add high-speed scanning and enhance focusing capability of optical systems February 21st, 2018

Atomic structure of ultrasound material not what anyone expected February 21st, 2018

Oxford Instruments announces Dr Kate Ross as winner of the 2018 Lee Osheroff Richardson Science Prize for North and South America February 20th, 2018

Computers aid discovery of new, inexpensive material to make LEDs with high color quality February 20th, 2018

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

MEMS chips get metatlenses: Combining metasurface lenses with MEMS technology could add high-speed scanning and enhance focusing capability of optical systems February 21st, 2018

Atomic structure of ultrasound material not what anyone expected February 21st, 2018

Computers aid discovery of new, inexpensive material to make LEDs with high color quality February 20th, 2018

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

Energy

Round-the-clock power from smart bowties February 5th, 2018

Silk fibers could be high-tech ‘natural metamaterials’ January 31st, 2018

A simple new approach to plastic solar cells: Osaka University researchers intelligently design new highly efficient organic solar cells based on amorphous electronic materials with potential for easy printing January 28th, 2018

Nature paper by Schlumberger researchers used photothermal based nanoscale IR spectroscopy to analyze heterogeneous process of petroleum generation January 23rd, 2018

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

Leti Chief Scientist Barbara De Salvo Will Help Kick Off ISSCC 2018 with Opening-Day Keynote: In Addition, Leti Scientists Will Present and Demo New Technology for Piezoelectric Energy Harvesting February 8th, 2018

Round-the-clock power from smart bowties February 5th, 2018

NTU scientists create customizable, fabric-like power source for wearable electronics January 30th, 2018

Ultra-thin memory storage device paves way for more powerful computing January 17th, 2018

Fuel Cells

Study boosts hope for cheaper fuel cells: Rice University researchers show how to optimize nanomaterials for fuel-cell cathodes January 6th, 2018

Hydrogen power moves a step closer: Physicists are developing methods of creating renewable fuel from water using quantum technology September 15th, 2017

More durable, less expensive fuel cells: University of Delaware researchers have developed a new technology that could speed up the commercialization of fuel cell vehicles September 5th, 2017

Engineers pioneer platinum shell formation process – and achieve first-ever observation August 11th, 2017

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project