Breakthrough Could Make Fuel Cells More Efficient
A breakthrough by chemists at the University of California-Berkeley could have a profound impact on the growing market for hydrogen fuel cell vehicles.
In an article appearing this week in the journal Science, UC Berkeley chemists show how to construct a catalyst composed only of edges and demonstrate that it can catalyze the production of hydrogen from water as readily as the edges and defects in regular catalysts.
“This is a conceptual advance in the way we think about generating hydrogen, a clean burning fuel, from water, a sustainable source,” said Christopher Chang, associate professor of chemistry and Howard Hughes Medical Institute Investigator at UC Berkeley. “Our new catalyst is just first generation, but the research gives us and the community a path forward to thinking about how to increase the density of functional active sites so that molecules and materials can be more effective catalysts.”
At the moment, creating these catalysts in the lab is not cheaper than using traditional catalysts, but efforts by Chang and others to simplify the process and create materials with billions of active sites on a ridged wafer much like a Ruffles potato chip could allow cheaper, commercially viable fuel cell catalysts.










The research team used agricultural survey data from Brazil to calculate emissions of air pollutants and greenhouse gases from the entire production, distribution, and lifecycle of sugarcane ethanol from 2000 to 2008.
A research team discovered that when corn stover is processed to make ethanol, three distinct parts of it – the rind, pith and leaves – break down in different ways.
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The webinar will feature the very latest on biodiesel research from two university students who will present their biodiesel research, and USDA’s Dr. Michael Haas, who will provide an overview of his work with low value feedstocks and in new process development. 
Molecular biologist Zonglin Lewis Liu with ARS’ National Center for Agricultural Utilization Research in Peoria found a biorefinery yeast that successfully ferments plant sugars from cornstalks, wheat straw, and other rough, fibrous, harvest-time leftovers into cellulosic ethanol. According to Liu, the yeast overcomes some of the troublesome compounds in these materials that are created during dilute acid pre-treatment of the crop leftover. The compounds tend to damage yeast cell walls and membranes, disrupt yeast genetic material such as DNA and RNA, and interfere with yeast enzymes’ fermentation abilities, ultimately reducing potential cellulosic ethanol yields.
Geneticist Ken Vogel (pictured) was one of a team of USDA’s Agricultural Research Service (ARS) scientists who developed the grading process that costs only about $5 a sample rather than the $300 to $2,000 per sample that conventional analytical methods cost.
