Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Noble way to low-cost fuel cells, halogenated graphene may replace expensive platinum

A schematic representation for the edge expansions of XGnPs is seen in the top images. The bottom images contain ball-mill capsule containing the pristine graphite and stainless steel balls.

Credit: UNIST
A schematic representation for the edge expansions of XGnPs is seen in the top images. The bottom images contain ball-mill capsule containing the pristine graphite and stainless steel balls.

Credit: UNIST

Abstract:
The research team of Ulsan National Institute of Science and Technology (UNIST), Case Western Reserve University and University of North Texas have paved a new way for affordable commercialization of fuel cells with efficient metal-free electrocatalysts using edge-halogenated graphene nanoplatelets.

Noble way to low-cost fuel cells, halogenated graphene may replace expensive platinum

Ulsan, South Korea | Posted on June 6th, 2013

Fuel cell technology has come a long way since the early days in the Apollo space program. Certainly the idea of running a car on pure hydrogen is an exciting prospect as the only emissions will be pure water.

But how much will you be willing to pay for this car? Current fuel cell technologies, need platinum (Pt) catalysts which are costly and insufficient for industry demand.

Beside the high cost of platinum, another major drawback for commercialization of fuel cell technology is the sluggish oxygen reduction reaction (ORR) at cathode. Although, Pt and its alloys have been considered to be the most reliable cathodic ORR electrocatalysts in fuel cells, it also suffers from methanol crossover/carbon monoxide (CO) poisoning effects and poor long-term operation stability.

Now, there is an alternative. The research team have created a low cost metal-free catalyst which can be scaled up for industrial and commercial use. They synthesized a series of edge-selectively halogenated (Cl, Br and I) graphene nanoplatelets (XGnPs) by ball-milling graphite flake in the presence of chlorine (Cl2), bromine (Br2), or iodine (I2), respectively.

The resultant XGnPs were tested as cathode electrodes of fuel cells and revealed remarkable electrocatalytic activities for ORR with higher tolerance to methanol crossover/CO poisoning effects and longer-term stability than those of the original graphite and commercial Pt/C electrocatalysts. This makes XGnPs a possible replacement for platinum (Pt) in fuel cells, bringing down the cost and increasing the likelihood of commercialization.

"Our result presents new insights and practical methods for designing edge-functionalized GnPs as high-performance metal-free ORR electrocatalysts through low-cost and scalable ball-milling techniques," said Prof. Jong-Beom Baek of Ulsan National Institute of Science and Technology, who led the research team.

"We made metal-free catalysts using an affordable and scalable process," said Prof. Liming Dai of Case Western Reserve and one of the paper's authors. "The catalysts are more stable than platinum catalysts and tolerate carbon monoxide poisoning and methanol crossover."

The research was led by Prof. Jong-Beom Baek, director of the Interdisciplinary School of Green Energy/Low-Dimensional Carbon Materials Center at South Korea's Ulsan National Institute of Science and Technology. Fellow authors include: In-Yup Jeon, Hyun-Jung Choi, Min Choi, Jeong-Min Seo, Sun-Min Jung, Min-Jung Kim and Neojung Park, from Ulsan; Sheng Zhang from Case Western Reserve; and Lipeng Zhang and Zhenhai Xia from North Texas.

More Information on Edge-halogenated graphene nanoplatelets (XGnPs)

Edge-halogenated graphene nanoplatelets (XGnPs) are solution processable, and show remarkable electrocatalytic activity toward ORR with a high selectivity, good tolerance and excellent long-term cycle stability.

Although extensive efforts have been devoted to the development of non-precious metal-based electrocatalysts, their practical application is still far from being a reality due to their limited electrocatalytic activity, poor cycle stability, and sometimes environmental hazard.

Alternatively, carbon-based materials, doped with heteroatoms such as boron (B), halogen (Cl, Br, I) nitrogen (N), phosphorus (P), sulfur (S) and their mixtures, have attracted tremendous attentions as metal-free ORR electrocatalysts. However, full potential of these carbon-based, metal-free catalysts is hard to achieve without the synthetic capability for large-scale, low-cost production of the heteroatome-doped, carbon-based materials.

These novel metal-free electrocatalysts were synthesized by ball-milling at high speed rotation (500 rpm) using stainless steel balls, generating sufficient kinetic energy to cause bond cleavages of the graphitic C-C framework. As a result, active carbon species formed at the broken edges of graphite, which were sufficiently reactive to pick up halogens in the sealed ball-mill capsule.
###

A description and details of the new research was published on June 5, 2013 (British Time) in the (Nature Publishing Group) Scientific Reports. (Title: Facile, scalable synthesis of edge-halogenated graphene nanoplatelets as efficient metal-free electrocatalysts for oxygen reduction reaction, DOI: 10.1038/srep01810)

Funding Information: World Class University (WCU), Mid-Career Researcher (MCR) and Basic Research Laboratory programs through the National Research Foundation of Korea, US-Korea NBIT and the U.S Air Force Office of Scientific Research funded the research.

####

For more information, please click here

Contacts:
Eunhee Song

82-522-171-224

Copyright © Ulsan National Institute of Science and Technology(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 News Press

News and information

Particle Works creates range of high performance quantum dots February 23rd, 2017

GLOBALFOUNDRIES Announces Availability of 45nm RF SOI to Advance 5G Mobile Communications: Optimized RF features deliver high-performance solutions for mmWave beam forming applications in 5G smartphones and base stations February 22nd, 2017

EmTech Asia breaks new barriers with potential applications of space exploration with NASA and MIT February 22nd, 2017

JPK selects compact tensile stage from Deben for their NanoWizardŽ AFM platform to broaden capabilities for materials characterisation February 22nd, 2017

Graphene/ Graphite

Strem Chemicals and Dotz Nano Ltd. Sign Distribution Agreement for Graphene Quantum Dots Collaboration February 21st, 2017

Oxford Instruments announces Dr Brad Ramshaw of Cornell University, as winner of the 2017 Lee Osheroff Richardson Science Prize February 20th, 2017

Graphene foam gets big and tough: Rice University's nanotube-reinforced material can be shaped, is highly conductive February 13th, 2017

Direct radiolabeling of nanomaterials: Directly radiolabeled nanographene materials without chelators are suitable for bioimaging applications February 9th, 2017

Govt.-Legislation/Regulation/Funding/Policy

Molecular phenomenon discovered by advanced NMR facility: Cutting edge technology has shown a molecule self-assembling into different forms when passing between solution state to solid state, and back again - a curious phenomenon in science - says research by the University of Wa February 22nd, 2017

'Lossless' metamaterial could boost efficiency of lasers and other light-based devices February 20th, 2017

Engineers shrink microscope to dime-sized device February 17th, 2017

Francis Alexander Named Deputy Director of Brookhaven Lab's Computational Science Initiative February 16th, 2017

Discoveries

Molecular phenomenon discovered by advanced NMR facility: Cutting edge technology has shown a molecule self-assembling into different forms when passing between solution state to solid state, and back again - a curious phenomenon in science - says research by the University of Wa February 22nd, 2017

Tiny nanoclusters could solve big problems for lithium-ion batteries February 21st, 2017

Oxford Instruments announces Dr Brad Ramshaw of Cornell University, as winner of the 2017 Lee Osheroff Richardson Science Prize February 20th, 2017

Breakthrough with a chain of gold atoms: In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport February 20th, 2017

Announcements

Particle Works creates range of high performance quantum dots February 23rd, 2017

GLOBALFOUNDRIES Announces Availability of 45nm RF SOI to Advance 5G Mobile Communications: Optimized RF features deliver high-performance solutions for mmWave beam forming applications in 5G smartphones and base stations February 22nd, 2017

EmTech Asia breaks new barriers with potential applications of space exploration with NASA and MIT February 22nd, 2017

JPK selects compact tensile stage from Deben for their NanoWizardŽ AFM platform to broaden capabilities for materials characterisation February 22nd, 2017

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

Molecular phenomenon discovered by advanced NMR facility: Cutting edge technology has shown a molecule self-assembling into different forms when passing between solution state to solid state, and back again - a curious phenomenon in science - says research by the University of Wa February 22nd, 2017

Tiny nanoclusters could solve big problems for lithium-ion batteries February 21st, 2017

Breakthrough with a chain of gold atoms: In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport February 20th, 2017

'Lossless' metamaterial could boost efficiency of lasers and other light-based devices February 20th, 2017

Military

'Lossless' metamaterial could boost efficiency of lasers and other light-based devices February 20th, 2017

Engineers shrink microscope to dime-sized device February 17th, 2017

Graphene foam gets big and tough: Rice University's nanotube-reinforced material can be shaped, is highly conductive February 13th, 2017

Meta-lenses bring benchtop performance to small, hand-held spectrometer: Game-changing nanostructure-based lenses allow smaller devices, increased functionality February 9th, 2017

Energy

Strem Chemicals and Dotz Nano Ltd. Sign Distribution Agreement for Graphene Quantum Dots Collaboration February 21st, 2017

'Lossless' metamaterial could boost efficiency of lasers and other light-based devices February 20th, 2017

In-cell molecular sieve from protein crystal February 14th, 2017

NREL research pinpoints promise of polycrystalline perovskites February 8th, 2017

Fuel Cells

Scientists boost catalytic activity for key chemical reaction in fuel cells: New platinum-based catalysts with tensile surface strain could improve fuel cell efficiency December 19th, 2016

It's basic: Alternative fuel cell technology reduces cost: Study sets performance targets for metal-free fuel cell membrane December 13th, 2016

Keeping electric car design on the right road: A closer look at the life-cycle impacts of lithium-ion batteries and proton exchange membrane fuel cells December 9th, 2016

Water vapor sets some oxides aflutter: Newly discovered phenomenon could affect materials in batteries and water-splitting devices October 3rd, 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