catalysts

Measurement technique probes surface structure of gold nanocrystals

harminka — Tue, 11 Mar 2008 11:40:08 -0500

In the hands of jewelers, gold can be fashioned into rings and pendants of long-lasting beauty. But, when reduced in size to nanocrystals containing a few thousand atoms, this noble metal is a surprisingly good catalyst.

Catalysis discovery takes aim at NOx emissions

harminka — Fri, 22 Feb 2008 13:00:51 -0600

A discovery in molecular chemistry may help remove a barrier to widespread use of diesel and other fuel-efficient "lean burn" vehicle engines. Researchers at the Department of Energy's Pacific Northwest National Laboratory have recorded the first observations of how certain catalyst materials used in emission control devices are constructed.

Oxygen atoms on titanium dioxide motivated by more than just temperature

harminka — Sat, 09 Feb 2008 11:54:53 -0600

Like two ballroom dancers waltzing together, the two atoms of an oxygen molecule severed by a metal catalyst usually behave identically. But new research reveals that on a particular catalyst, split oxygen atoms act like a couple dancing the tango: one oxygen atom plants itself while the other shimmies away, probably with energy partially stolen from the stationary one.

Mazda Develops World's First Catalist Material Structure

harminka — Mon, 01 Oct 2007 12:22:29 -0500

Mazda Motor Corporation has developed a world-first catalyst for cars that use single-nanotechnology to create a catalyst material structure which substantially reduces the amount of precious metals that are used, such as platinum and palladium.

Tiny tubes, rods show promise as catalysts, sunscreen

harminka — Mon, 10 Sep 2007 13:31:29 -0500

Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have developed new ways to make or modify nanorods and nanotubes of titanium oxide, a material used in a variety of industrial and medical applications. The methods and new titanium oxide materials may lead to improved catalysts for hydrogen production, more efficient solar cells, and more protective sunscreens.

New catalysts may create more, cheaper hydrogen

harminka — Wed, 22 Aug 2007 04:48:13 -0500

A new class of catalysts created at the U.S. Department of Energy's Argonne National Laboratory may help scientists and engineers overcome some of the hurdles that have inhibited the production of hydrogen for use in fuel cells.

Efficient catalysts for improving the performance of fuel cells

harminka — Wed, 28 Mar 2007 11:12:52 -0500

X-ray studies at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory are pointing the way to less costly and more efficient catalysts for improving the performance of fuel cells. The studies, which will be presented by Brookhaven chemist Jose Rodriguez at the 233rd National Meeting of the American Chemical Society, show that copper can be substituted for gold in reactions that keep fuel cells functioning longer while eliminating unwanted byproducts.

Giving platinum catalysts golden boost for fuel cells

harminka — Wed, 28 Mar 2007 03:30:08 -0500

Platinum might outweigh gold in the jewelry market, but as part of an ongoing effort to produce efficient and affordable fuel cells, scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory are studying how gold atoms might enhance the value of the pricier metal.

Unique structure of atomic movement may impact on designs of pharmaceuticals

harminka — Tue, 27 Feb 2007 10:43:57 -0600

Growing catalysts

harminka — Fri, 08 Dec 2006 10:30:09 -0600