Navigation Links
Brown chemists create more efficient palladium fuel cell catalysts
Date:3/19/2009

PROVIDENCE, R.I. [Brown University] Even small devices need power, and much of that juice comes from fuel cells. As these devices become even smaller, the rush is on to find more efficient ways to power them.

In the last several years, scientists have discovered that palladium, a metal, is a strong candidate for providing that initial boost that helps fuel cells go. Palladium is far cheaper than another popular fuel cell catalyst, platinum, and it's more abundant.

But researchers have wrestled with creating palladium nanoparticles with enough active surface area to make catalysis efficient in fuel cells while preventing particles from clumping together during the chemical processes that convert a fuel source to electricity. Two Brown University chemists have found a way to overcome those challenges.

The scientists report in the online edition of the Journal of the American Chemical Society that they have produced palladium nanoparticles with about 40 percent greater surface area than commercially available palladium particles. The Brown catalysts also remain intact four times longer than what's currently available.

"This approach is very novel. It works," said Vismadeb Mazumder, a graduate student who joined chemistry professor Shouheng Sun on the paper. "It's two times as active, meaning you need half the energy to catalyze. And it's four times as stable."

Mazumder and Sun created palladium nanoparticles 4.5 nanometers in size. They attached the nanoparticles to a carbon platform at the anode end of a direct formic acid fuel cell. The researchers then did something new: They used weak binding amino ligands to keep the palladium nanoparticles separate and at the same size as they're attached to the carbon platform. By keeping the particles separate and uniform in size, they increased the available surface area on the platform and raised the efficiency of the fuel cell reaction.

"It just works better,
'/>"/>

Contact: Richard Lewis
Richard_Lewis@Brown.edu
401-863-3766
Brown University
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Jennifer Brownstein, of CONNEXION Healthcare, Honored as Rising Star by Healthcare Businesswomens Association
2. NSTI Announces the 12th Annual Nanotech Conference & Expo 2009 May 3-7, at the George R. Brown Convention Center in Houston, Texas
3. [video] David Brown, President and CEO of LifeVantage Corporation, Discusses Record Page Views on WallSt.nets 3-Minute Press Show
4. Board Certified Dermatologist and President-Elect of the Dermatologic Society of Greater New York, Dr. Lance H. Brown Takes His Comprehensive Practice to East Hampton, NY
5. SURGEX(TM) Becomes the Official Sports Nutrition Drink of Former NBA Player Dee Brown and his Edge Basketball Training Facility
6. Dr. Elizabeth Brown Joins Argenta TEC
7. Leslie J. Browne Resigns as President and Chief Executive Officer of Pharmacopeia, Inc.
8. TIBCO Speeds Drug Discovery for Chemists
9. Northwestern chemists take gold, mass-produce Beijing Olympic logo
10. Glowing films developed by UC San Diego chemists reveal traces of explosives
11. Chemists measure copper levels in zinc oxide nanowires
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Brown chemists create more efficient palladium fuel cell catalysts
(Date:8/1/2014)... ALBANY, New York , August 1, 2014 /PRNewswire/ ... published by Transparency Market Research "Biophotonics Market - Global ... - 2020," the market was valued at USD 25.16 ... 50.20 billion by 2020, growing at a CAGR of ... full Biophotonics Market Report at  http://www.transparencymarketresearch.com/biophotonics-market.html ...
(Date:8/1/2014)... BCC Research ( http://www.bccresearch.com ) reveals ... AND GLOBAL MARKETS , that the global market RNA ... to nearly $38.8 billion by 2018, with a five-year ... delivery category, the fastest moving segment of the market, ... field of RNAi therapeutics has shown tremendous growth and ...
(Date:8/1/2014)... Testing the mechanical properties of microtissues ... embryonic development. How and why embryonic stem ... distinct tissues is important because abnormalities can lead ... Melissa Kinney, and Rabbia Saeed worked from the ... to control many aspects of embryo development. ...
(Date:7/31/2014)... July 31, 2014 Today BioSpace , the leading life ... map campaign spotlighting the life sciences community in Illinois ... Kansas , Michigan , Minnesota ... Ohio and Wisconsin . ... percent of all job postings on BioSpace originating in this region in ...
Breaking Biology Technology:Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 2Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 3Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 4Global Market for RNAi Drug Delivery Technologies to Reach $38.8 Billion in 2018; Aptamer Delivery Segment Surging at 58.2% CAGR 2Global Market for RNAi Drug Delivery Technologies to Reach $38.8 Billion in 2018; Aptamer Delivery Segment Surging at 58.2% CAGR 3Study Links Biomechanics and Gene Expression in Stem Cells 2Midwest Biotech Leaders Featured On BioSpace Map 2
... April 20 Santaris Pharma announced today,promising ... vivo activity of microRNA-targeted,therapeutics against cancer developed ... Acid (LNA) Drug Platform. In both in ... targeted LNA-antimiR(R),s demonstrated outstanding,recognition and inhibition of ...
... Group of AdvisorsSAN DIEGO, April 20 Trius Therapeutics, ... Board, naming Donald H. Batts, MD, FACP, FIDSA, and ... members of the group of anti-infective thought leaders. ... Michigan State University and the Chief of Infectious ...
... Photonics , a joint team of researchers at CIC ... de Materiales of CSIC/UPV-EHU in San Sebastian (Spain), Harvard ... in Munich (Germany) reports an innovative method for controlling ... radio-frequency technology. The method opens the door for targeted ...
Cached Biology Technology:LNA-Based RNA oligonucleotides Potently Inhibit Cancer microRNAs 2Trius Appoints Don Batts and Ralph Corey to Clinical Advisory Board 2Bridging the gap in nanoantennas 2Bridging the gap in nanoantennas 3
(Date:8/1/2014)... than 10,000 reptile species have been recorded into ... living reptile species and classification, making the reptile ... the world, alongside bird and fish species. , ... would mark the year that reptiles would become ... Reptiles include snakes, lizards, turtles, crocodiles, tuataras and ...
(Date:8/1/2014)... marine mammals have officially named a species new ... sahulensis , according to the Wildlife Conservation Society ... the newly named species is the culmination of ... historical records, physical descriptions, and genetic data of ... from the coast of West Africa to the ...
(Date:8/1/2014)... The Journal of Nutrition Education and Behavior (JNEB) announces ... (GEM) awards, which were presented at the Society for ... Impact: Local to Global," in Milwaukee, Wisconsin, June 28 ... the authors of the best article and best GEM ... of the JNEB Journal Committee and Board of Editors. ...
Breaking Biology News(10 mins):Reptile Database surpasses 10,000 reptile species 2Reptile Database surpasses 10,000 reptile species 3Scientists name new species of cetacean: The Australian humpback dolphin 2Scientists name new species of cetacean: The Australian humpback dolphin 3
... In what amounted to a kind of ... data from 175 fields in Illinois, Wisconsin, and Minnesota shed ... the most troublesome weeds, the results also revealed some of ... and sweet corn yield in the Midwest. "Rather than ...
... News headlines are filled with discussion and debate ... Conference in Copenhagen. As expected, the majority ... focused on traditional environmental measures - regulations to ... etc. A new book Paradise Regained: The ...
... such as pomegranates, that contain anti-aromatase phytochemicals reduces the ... a study published in the January issue of ... Association for Cancer Research. Pomegranate is enriched ... as shown in this study, appear to be responsible ...
Cached Biology News:Sweet corn study provides large-scale picture of better fields 2Sweet corn study provides large-scale picture of better fields 3Global warming and other environmental dangers may be solved by unlikely source -- space technology 2Natural compounds in pomegranates may prevent growth of hormone-dependent breast cancer 2
... The epitope is specific for Kir2.1 ... other known protein.,SPECIES REACTIVITIES: The ... bovine, porcine and guinea pig. It ... mouse (17/19 residues) and chick (15/19 ...
... Glutamate is the main excitatory neurotransmitter ... had been considered to act only on ... kainate receptors that are involved in the ... been shown to regulate enzymes producing second ...
Polyclonal Antibody to TRIB1/ SKIP1/ Tribbles 1...
PMA (YPMA-1)...
Biology Products: