Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

UNIST team reports a new family of non-precious high performance metal catalysts

25.09.2013
Researchers from Ulsan National Institute of Science and Technology (UNIST), Korea Institute of Energy Research (KIER), and Brookhaven National Laboratory, have discovered a new family of non-precious metal catalysts that performs better than Pt at 10% of the cost.

Researchers from Ulsan National Institute of Science and Technology (UNIST), Korea Institute of Energy Research (KIER), and Brookhaven National Laboratory, have discovered a new family of non-precious metal catalysts. These catalysts exhibit better performance than platinum in oxygen-reduction reaction (ORR) only with 10 % of the production cost of a platinum catalyst.


Copyright : UNIST

The finding, described in Nature’s Scientific Reports (published online on Sep. 23, 2013), provides an important step towards circumventing the biggest obstacle to widespread- commercialization of fuel cell technology.

Fuel cells have various advantages compared to internal combustion engines or batteries, due to their high energy conversion efficiency and environmentally benign and quiet operation conditions. However, the high cost and instability of platinum catalysts for oxygen reduction reaction at the cathode have critically impeded the extensive application of polymer electrolyte fuel cells.

The UNIST research team reported on a new family of non-precious metal catalysts based on ordered mesoporous *porphyrinic carbons (M-OMPC) with high surface areas and tunable pore structures.

“Our synthetic strategy for the non-precious metal catalysts included a multitude of advantages that would be favorable to PEFC applications” said Prof. Joo. “First, our synthetic method is amenable to simple and mild experimental conditions. Second, the synthesis of the M-OMPC catalysts could be readily scaled up to a few tens of grams in a single batch. Third, well-developed, hierarchical micro-mesoporosity would be advantageous for efficient transport of fuels and by-products. Finally, the M-OMPC catalysts showed very high surface areas, which could significantly increase the density of the catalytically active sites accessible to reactants.”

The research was led by Sang Hoon Joo, professor of the School of Nano-Bioscience and Chemical Engineering at South Korea’s UNIST. Fellow authors include: Jae Yeong Cheon from UNIST; Gu-Gon Park from the Korea Institute of Energy Research (KIER); Radoslav R. Adzic from the Chemistry Department of the Brookheaven National Laboratory.

The materials developed by the UNIST research team were prepared by nanocasting ordered mesoporous silica (OMS) templates with metalloporphyrin precursors. In addition they were constructed with three dimensional networks of porphyrinic carbon frameworks.

The best M-OMPC catalyst showed an extremely high electrocatalytic activity for ORR in an acidic media. Its ORR activity is one of the best among the non-precious metal catalysts ever, and even higher than the state-of-the-art Pt catalyst. In addition, the FeCo-OMPC showed superior long-term durability and methanol-tolerance in ORR, compared to the Pt catalyst.

The research team attributed the high ORR activity of the FeCo-OMPC to its relatively weak interaction with oxygen as well as the high surface area design of the catalyst.

“Currently the world is striving to look for another energy source for increased energy demand and environmental issue,” said Prof. Joo. “The novel material developed by the UNIST research team would be a solution to commercialize the eco-friendly and cost-effective fuel cells.”

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, the support from Korea Institute of Energy Research, National Junior Research Fellowship, and Global Ph.D. Fellowship.

*porphyrin: Any of a class of heterocyclic compounds containing four pyrrole rings arranged in a square

Journal information
(Nature Publishing) Scientific Reports
Funding information
The National Research Foundation of Korea funded by the Ministry of Education, the support from Korea Institute of Energy Research, National Junior Research Fellowship, and Global Ph.D. Fellowship

Eunhee Song | Research asia research news
Further information:
http://www.unist.ac.kr
http://www.researchsea.com

More articles from Power and Electrical Engineering:

nachricht Linear potentiometer LRW2/3 - Maximum precision with many measuring points
17.05.2017 | WayCon Positionsmesstechnik GmbH

nachricht First flat lens for immersion microscope provides alternative to centuries-old technique
17.05.2017 | Harvard John A. Paulson School of Engineering and Applied Sciences

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

Physicists discover mechanism behind granular capillary effect

24.05.2017 | Physics and Astronomy

Measured for the first time: Direction of light waves changed by quantum effect

24.05.2017 | Physics and Astronomy

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>