Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > 3D hierarchically porous nanostructured catalyst helps efficiently reduce CO2? This new catalyst will bring CO2 one step closer to serving as a sustainable energy source

Fabrication procedures of various gold nanostructures through proximity-field nanopatterning (PnP) and electroplating techniques.

CREDIT
Professor Seokwoo Jeon and Professor Jihun Oh, KAIST
Fabrication procedures of various gold nanostructures through proximity-field nanopatterning (PnP) and electroplating techniques. CREDIT Professor Seokwoo Jeon and Professor Jihun Oh, KAIST

Abstract:
KAIST researchers developed a three-dimensional (3D) hierarchically porous nanostructured catalyst with carbon dioxide (CO2) to carbon monoxide (CO) conversion rate up to 3.96 times higher than that of conventional nanoporous gold catalysts. This new catalyst helps overcome the existing limitations of the mass transport that has been a major cause of decreases in the CO2 conversion rate, holding a strong promise for the large-scale and cost-effective electrochemical conversion of CO2 into useful chemicals.

3D hierarchically porous nanostructured catalyst helps efficiently reduce CO2? This new catalyst will bring CO2 one step closer to serving as a sustainable energy source

Ulsan, Korea | Posted on March 13th, 2020

As CO2 emissions increase and fossil fuels deplete globally, reducing and converting CO2 to clean energy electrochemically has attracted a great deal of attention as a promising technology. Especially due to the fact that the CO2 reduction reaction occurs competitively with hydrogen evolution reactions (HER) at similar redox potentials, the development of an efficient electrocatalyst for selective and robust CO2 reduction reactions has remained a key technological issue.

Gold (Au) is one of the most commonly used catalysts in CO2 reduction reactions, but the high cost and scarcity of Au pose obstacles for mass commercial applications. The development of nanostructures has been extensively studied as a potential approach to improving the selectivity for target products and maximizing the number of active stable sites, thus enhancing the energy efficiency.

However, the nanopores of the previously reported complex nanostructures were easily blocked by gaseous CO bubbles during aqueous reactions. The CO bubbles hindered mass transport of the reactants through the electrolyte, resulting in low CO2 conversion rates.

In the study published in the Proceedings of the National Academy of Sciences of the USA (PNAS) on March 4, a research group at KAIST led by Professor Seokwoo Jeon and Professor Jihun Oh from the Department of Materials Science and Engineering designed a 3D hierarchically porous Au nanostructure with two different sizes of macropores and nanopores. The team used proximity-field nanopatterning (PnP) and electroplating techniques that are effective for fabricating the 3D well-ordered nanostructures.

The proposed nanostructure, comprised of interconnected macroporous channels 200 to 300 nanometers (nm) wide and 10 nm nanopores, induces efficient mass transport through the interconnected macroporous channels as well as high selectivity by producing highly active stable sites from numerous nanopores.

As a result, its electrodes show a high CO selectivity of 85.8% at a low overpotential of 0.264 V and efficient mass activity that is up to 3.96 times higher than that of de-alloyed nanoporous Au electrodes.

"These results are expected to solve the problem of mass transfer in the field of similar electrochemical reactions and can be applied to a wide range of green energy applications for the efficient utilization of electrocatalysts," said the researchers.

###

This work was supported by the National Research Foundation (NRF) of Korea.

####

For more information, please click here

Contacts:
Younghye Cho

82-423-502-294

@KAISTPR

Copyright © UNIST

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 Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

An EPiQS Pursuit: Physicist Andrea Young is chosen to receive an Experimental Investigator award from the Moore Foundation May 28th, 2020

Study finds electrical fields can throw a curveball: Particle-scale phenomenon akin to the swerving of a curveball could allow selective separation of suspended nanomaterials May 26th, 2020

Surrey reveals its implantable biosensor that operates without batteries May 22nd, 2020

Researchers demonstrate transport of mechanical energy, even through damaged pathways: Topological pump can provide stability for communication technologies May 22nd, 2020

Oriented hexagonal boron nitride foster new type of information carrier May 22nd, 2020

Chemistry

MSU scientists solve half-century-old magnesium dimer mystery May 22nd, 2020

Fueling the World Sustainably: Synthesizing Ammonia using Less Energy April 26th, 2020

Govt.-Legislation/Regulation/Funding/Policy

Study finds electrical fields can throw a curveball: Particle-scale phenomenon akin to the swerving of a curveball could allow selective separation of suspended nanomaterials May 26th, 2020

Scientists use light to accelerate supercurrents, access forbidden light, quantum world May 21st, 2020

Electrons break rotational symmetry in exotic low-temp superconductor: Scientists previously observed this peculiar behavior in other materials whose ability to conduct electricity without energy loss cannot be explained by standard theoretical frameworks May 19th, 2020

Scientists break the link between a quantum material's spin and orbital states: The advance opens a path toward a new generation of logic and memory devices based on orbitronics that could be 10,000 times faster than today's May 15th, 2020

Possible Futures

An EPiQS Pursuit: Physicist Andrea Young is chosen to receive an Experimental Investigator award from the Moore Foundation May 28th, 2020

Study finds electrical fields can throw a curveball: Particle-scale phenomenon akin to the swerving of a curveball could allow selective separation of suspended nanomaterials May 26th, 2020

Visualization of functional components to characterize optimal composite electrodes May 22nd, 2020

Researchers demonstrate transport of mechanical energy, even through damaged pathways: Topological pump can provide stability for communication technologies May 22nd, 2020

Discoveries

Study finds electrical fields can throw a curveball: Particle-scale phenomenon akin to the swerving of a curveball could allow selective separation of suspended nanomaterials May 26th, 2020

MSU scientists solve half-century-old magnesium dimer mystery May 22nd, 2020

Researchers review advances in 3D printing of high-entropy alloys: SUTD collaborates with universities in Singapore and China to shine light on HEA manufacturing processes and inspire further research in this emerging field May 22nd, 2020

A stitch in time: How a quantum physicist invented new code from old tricks: Error suppression opens pathway to universal quantum computing May 22nd, 2020

Announcements

An EPiQS Pursuit: Physicist Andrea Young is chosen to receive an Experimental Investigator award from the Moore Foundation May 28th, 2020

Study finds electrical fields can throw a curveball: Particle-scale phenomenon akin to the swerving of a curveball could allow selective separation of suspended nanomaterials May 26th, 2020

Visualization of functional components to characterize optimal composite electrodes May 22nd, 2020

Researchers demonstrate transport of mechanical energy, even through damaged pathways: Topological pump can provide stability for communication technologies May 22nd, 2020

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

Study finds electrical fields can throw a curveball: Particle-scale phenomenon akin to the swerving of a curveball could allow selective separation of suspended nanomaterials May 26th, 2020

Surrey reveals its implantable biosensor that operates without batteries May 22nd, 2020

Visualization of functional components to characterize optimal composite electrodes May 22nd, 2020

Researchers demonstrate transport of mechanical energy, even through damaged pathways: Topological pump can provide stability for communication technologies May 22nd, 2020

Energy

Oil & gas and automotive sectors will benefit from durable polymers with graphene nanotubes May 14th, 2020

Transporting energy through a single molecular nanowire: Why single wires are superior to bundles May 8th, 2020

Scientists have created new nanocomposite from gold and titanium oxide: Scientists use lasers and gold particles to turn titanium oxide into nanocomposite for photocatalysts May 8th, 2020

Water-splitting module a source of perpetual energy: ‘Artificial leaf’ concept inspires Rice University research into solar-powered fuel production May 4th, 2020

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