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

AIM Photonics Announces Release of Process Design Kit (PDK) for Integrated Silicon Photonics Design August 25th, 2016

Semblant to Present at China Mobile Manufacturing Forum 2016 August 25th, 2016

Johns Hopkins scientists track metabolic pathways to find drug combination for pancreatic cancer August 25th, 2016

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

Graphene/ Graphite

'Sniffer plasmons' could detect explosives: Scientists have proposed a graphene-based spaser that can detect even small amounts of various substances, including explosives August 16th, 2016

Nanoribbons in solutions mimic nature: Rice University scientists test graphene ribbons' abilities to integrate with biological systems August 15th, 2016

Lithium-ion batteries: Capacity might be increased by 6 times August 9th, 2016

Swapping substrates improves edges of graphene nanoribbons: Using inert boron nitride instead of silica creates precise zigzag edges in monolayer graphene August 2nd, 2016

Govt.-Legislation/Regulation/Funding/Policy

Johns Hopkins scientists track metabolic pathways to find drug combination for pancreatic cancer August 25th, 2016

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

Light and matter merge in quantum coupling: Rice University physicists probe photon-electron interactions in vacuum cavity experiments August 24th, 2016

New theory could lead to new generation of energy friendly optoelectronics: Researchers at Queen's University Belfast and ETH Zurich, Switzerland, have created a new theoretical framework which could help physicists and device engineers design better optoelectronics August 23rd, 2016

Discoveries

Johns Hopkins scientists track metabolic pathways to find drug combination for pancreatic cancer August 25th, 2016

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

50 years after the release of the film 'Fantastic Voyage,' science upstages fiction: Science upstages fiction with nanorobotic agents designed to travel in the human body to treat cancer August 25th, 2016

Light and matter merge in quantum coupling: Rice University physicists probe photon-electron interactions in vacuum cavity experiments August 24th, 2016

Announcements

AIM Photonics Announces Release of Process Design Kit (PDK) for Integrated Silicon Photonics Design August 25th, 2016

Semblant to Present at China Mobile Manufacturing Forum 2016 August 25th, 2016

Johns Hopkins scientists track metabolic pathways to find drug combination for pancreatic cancer August 25th, 2016

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

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

Johns Hopkins scientists track metabolic pathways to find drug combination for pancreatic cancer August 25th, 2016

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

50 years after the release of the film 'Fantastic Voyage,' science upstages fiction: Science upstages fiction with nanorobotic agents designed to travel in the human body to treat cancer August 25th, 2016

New microchip demonstrates efficiency and scalable design: Increased power and slashed energy consumption for data centers August 24th, 2016

Military

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

Nanoparticles that speed blood clotting may someday save lives August 23rd, 2016

Curbing the life-long effects of traumatic brain injury August 19th, 2016

Lab team spins ginger into nanoparticles to heal inflammatory bowel disease August 19th, 2016

Energy

New electrical energy storage material shows its power: Nanomaterial combines attributes of both batteries and supercapacitors August 25th, 2016

Lehigh engineer discovers a high-speed nano-avalanche: New findings published in the Journal of Electrochemical Society about the process involving transformations in glass that occur under intense electrical and thermal conditions could lead the way to more energy-efficient glas August 24th, 2016

New flexible material can make any window 'smart' August 23rd, 2016

Researchers reduce expensive noble metals for fuel cell reactions August 22nd, 2016

Fuel Cells

Researchers reduce expensive noble metals for fuel cell reactions August 22nd, 2016

W.M. Keck Foundation awards Cal State LA a $375,000 research and education grant August 4th, 2016

Proton pinball on the catalyst: Moisture helps catalyst in fuel cells August 3rd, 2016

New nontoxic process promises larger ultrathin sheets of 2-D nanomaterials July 27th, 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