Energy
Turning a greenhouse gas into a clean energy fuel is the Holy Grail of energy research. UC San Diego chemists have a prototype they think is an important milestone.
Their device captures energy from the sun, converts it to electrical energy and "splits" carbon dioxide into carbon monoxide (CO) and oxygen.
Obviously carbon monoxide in and of itself is not great either but millions of pounds of it are used each year to manufacture chemicals including detergents and plastics. It can also be converted into liquid fuel.
"The technology to convert carbon monoxide into liquid fuel has been around…
Unique three-dimensional solar cells that capture nearly all of the light that strikes them could boost the efficiency of photovoltaic (PV) systems while reducing their size, weight and mechanical complexity.
The new 3D solar cells capture photons from sunlight using an array of miniature "tower" structures that resemble high-rise buildings in a city street grid. The cells could find near-term applications for powering spacecraft, and by enabling efficiency improvements in photovoltaic coating materials, could also change the way solar cells are designed for a broad range of applications.…
Peak oil is loosely defined at the point in time when half of all the oil reserves in the earth have been extracted and burned. This means that we are half way through the oil consumption cycle and move into extracting the remaining 50%. Some of the most respected experts and oil geologists have long suggested that peak oil would occur in the early part of this century, that in the decade 2000-2010 we would move through it. The expected symptoms would be a dramatic increase in price, followed by price volatility, with a long term ever upward pressure on pricing due to…
Researchers at Delft University of Technology can predict how nanostructuring – the extreme reduction of structure – will affect the performance of Li-ion batteries. The nanostructuring of battery materials is likely to be common practice in the future, but it is not always performance-enhancing. The research findings have recently been published in the Journal of the American Chemical Society.
A Li-ion battery is currently the smallest and lightest way to store as much rechargeable electrical energy as possible. However, the batteries are slow to charge and discharge, and this restricts…
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. Specifically, they're looking for ways to use gold to prevent the destruction of platinum in the chemical reactions that take place in fuel cells. Brookhaven chemist Radoslav Adzic will describe this research during the 233rd National Meeting of the American Chemical Society on Tuesday, March 27, 2007, in…
Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory are trying to design catalysts inspired by photosynthesis, the natural process by which green plants convert sunlight, water, and carbon dioxide into oxygen and carbohydrates. The goal is to design a bio-inspired system that can produce fuels like methanol, methane, and hydrogen directly from water and carbon dioxide using renewable solar energy. Four Brookhaven chemists will discuss their research on this so-called "artificial photosynthesis" at the 233rd National Meeting of the American Chemical Society.…
Researchers at the U.S. Department of Energy’s Ames Laboratory are employing some modern day alchemy in an effort to find a material with properties of rare and high-priced palladium. If they’re successful, it could remove a major roadblock from the path of hydrogen fuel-cell powered vehicles.
Hydrogen fuel-cell technology sounds almost too good to be true. You combine cheap and plentiful hydrogen and oxygen gas, the fuel cell generates electricity and the by-product is simply water. But it’s a little more involved.
The key is a proton exchange membrane, or PEM, containing platinum. The…
A pioneering “biofuel cell” that produces electricity from ordinary air spiked with small amounts of hydrogen offers significant potential as an inexpensive and renewable alternative to the costly platinum-based fuel cells that have dominated discussion about the “hydrogen economy” of the future, British scientists reported here today.
The research was presented at the week-long 233rd national meeting of the American Chemical Society, the world’s largest scientific society.
Fraser Armstrong, Ph.D., described how his research group at Oxford University built the biofuel cell with…
In the debate over alternative energy resources, geothermal technology has received scant media attention. Advocates call it one of the cleanest, sustainable energy resources available. However, steep construction, equipment and drilling costs have prevented more widespread development of geothermal technology. An Ohio University hydrothermal systems expert is working to change that.
Geothermal power plants harness energy created by heat at the Earth's core. Credit: Dina Lopez/Ohio University
Geothermal technology harnesses energy created by heat at the Earth’s core. Internationally,…
Plants can do it: they simply grab carbon dioxide out of the air and covert it into biomass. In this process, known as photosynthesis, the plants use light as their energy source. Chemists would also like to be able to use CO2 as a carbon source for their synthetic reactions, but it doesn’t work just like that. A team headed by Markus Antonietti at the Max Planck Institute for Colloids and Interfaces has now taken an important step toward this goal. As described in the journal Angewandte Chemie, they have successfully activated CO 2 for use in a chemical reaction by using a special new type…