Hydrogen fuel cells become faster and greener with new catalyst

May 08, 2006

Hydrogen fuel cells powered by methanol are a promising option for reducing the nation’s nearly 200 billion-gallon-per-year gasoline habit. But, making the technology a reality requires catalysts that speed up the chemical reactions while working under everyday conditions.

Scientists at Pacific Northwest National Laboratory and the University of Idaho have developed a highly efficient catalyst of multi-walled carbon nanotubes decorated with tiny particles of a platinum and ruthenium composite. Preparation is a key factor in determining the activity of a catalyst.

The researchers selected a process using supercritical carbon dioxide, which has the properties of a gas and a liquid. The supercritical fluid technology may result in products and processes that are cleaner, less expensive and of higher quality than those produced using conventional solvents.

The technology also is easily manipulated to allow a fine degree of control and is easily separated from the catalyst. Moreover, it is nontoxic, which could improve worker safety and reduce environmental impacts.

PNNL scientist Yuehe Lin will discuss “Pt and Pt-Ru/Carbon Nanotube Nanocomposites Synthesized in Supercritical Fluid as Electrocatalysts for Low-Temperature Fuel Cells” at NSTI Nanotechnology Conference, May 7-11, Boston.

Source: PNNL

Explore further: Researchers rapidly finding new applications for coherent diffractive imaging

Related Stories

Recommended for you

Could computers reach light speed?

May 28, 2015

Light waves trapped on a metal's surface travel nearly as fast as light through the air, and new research at Pacific Northwest National Laboratory shows these waves, called surface plasmons, travel far enough ...

Researchers first to create a single-molecule diode

May 25, 2015

Under the direction of Latha Venkataraman, associate professor of applied physics at Columbia Engineering, researchers have designed a new technique to create a single-molecule diode, and, in doing so, they ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.