Like a hungry diner ripping open a dinner roll, a fuel cell catalyst that converts hydrogen into electricity must tear open a hydrogen molecule. Now researchers have captured a view of such a catalyst holding onto the two halves of its hydrogen feast. The view confirms previous hypotheses and provides insight into how to make the catalyst work better for alternative energy uses.
Solar Frontier and the State Univ. of New York...
In the quest to make sun power more competitive, researchers are designing ultra-thin solar...
Rechargeable lithium-ion batteries are key components for portable electronics, medical devices, industrial equipment and automobiles. They are light weight, provide high energy density and recharge without memory effects. Much research has been spent on improving product safety, lifecycle and power output over a range of high and low temperatures, yet understanding fundamental processes and degradation mechanism remains a challenge.
For years, companies have been adding whiteners to laundry detergent, paints, plastics, paper and fabrics to make whites look "whiter than white," but now, with a switch away from incandescent and fluorescent lighting, different degrees of whites may all look the same, according to experts in lighting.
Using corn crop residue to make ethanol and other biofuels reduces soil carbon and can generate more greenhouse gases than gasoline, according to a study published in the journal Nature Climate Change. The findings by a Univ. of Nebraska-Lincoln team of researchers cast doubt on whether corn residue can be used to meet federal mandates to ramp up ethanol production and reduce greenhouse gas emissions.
One strategy for addressing the world’s energy crisis is to stop wasting so much energy when producing and using it, which can happen in coal-fired power plants or transportation. Nearly two-thirds of energy input is lost as waste heat. Now Northwestern Univ. scientists have discovered a surprising material that is the best in the world at converting waste heat to useful electricity.
The solar lamp developed by a start-up in Switzerland is a more effective, safer, and less expensive form of illumination than the traditional oil lamp currently used by more than one billion people in the world. Designed to be made by anyone, these solar-powered light-emitting diode lamps require nothing more than locally-found equipment. Only the solar panels are ordered from abroad.
Scientists at Yale Univ. have confirmed a 50-year-old, previously untested theoretical prediction in physics and improved the energy storage time of a quantum switch by several orders of magnitude. High-quality quantum switches are essential for the development of quantum computers and the quantum Internet.
When an earthquake and tsunami struck the Fukushima Daiichi nuclear plant complex in 2011, neither the quake nor the inundation caused the ensuing contamination. Rather, it was the aftereffects—specifically, the lack of cooling for the reactor cores, due to a shutdown of all power at the station—that caused most of the harm. A new design for nuclear plants built on floating platforms could help avoid such consequences in the future.
Electric vehicles could travel farther and more renewable energy could be stored with lithium-sulfur batteries that use a unique powdery nanomaterial. Researchers added the powder, a kind of nanomaterial called a metal organic framework, to the battery's cathode to capture problematic polysulfides that usually cause lithium-sulfur batteries to fail after a few charges.
The chemistry of lithium-ion batteries limits how much energy they can store, and one promising solution is the lithium-sulfur battery, which can hold as much as four times more energy per mass. However, problematic polysulfides usually cause lithium-sulfur batteries to fail after a few charges. Researchers at Pacific Northwest National Laboratory, however, have developed a new powdery nanomaterial that could solve the issue.
According to a new study, coupling commercially available spectral x-ray detectors with a specialized algorithm can improve the detection of uranium and plutonium in small, layered objects such as baggage. This approach enhances the detection powers of x-ray imaging and may provide a new tool to impede nuclear trafficking.
Titan Aerospace, a maker of solar-powered drones, has been purchased by Google, which says it could help bring Internet access to remote parts of the world. Titan's atmospheric satellites, which are still in development and not yet commercially available, can stay in the air for as long as five years. Titan's website has cited a wide range of uses for the drones.
Researchers in California have created, for the first time, compounds made from mixtures of calcium hexaboride, strontium and barium hexaboride. They also demonstrated that these ceramic materials could be manufactured using a simple, low-cost manufacturing method known as combustion synthesis.
The stakes are incredibly high for the safety and compliance efforts of today’s oil and gas industry. Engineers and crews must be trained for increasingly complex processes and procedures used aboard drilling rigs and production platforms. The consequences of inadequate training during oil production can be disastrous to both operator crews and the environment.
Navigant Research forecasts that the “global biofuels production will reach 61 billion gallons by 2023, replacing nearly 6% of global transportation fuel production from fossil sources and generating $70 billion in new revenue over the next decade.” The demand for an appropriate crop that can provide biofuels, without competing for land use with food crops, is on.
High levels of the greenhouse gas methane were found above shale gas wells at a production point not thought to be an important emissions source, according to a study jointly led by Purdue and Cornell universities. The findings could have implications for the evaluation of the environmental impacts from natural gas production.
A house window that doubles as a solar panel could be on the horizon, thanks to recent quantum dot work by Los Alamos National Laboratory researchers in collaboration with scientists from Univ. of Milano-Bicocca, Italy. Their project demonstrates that superior light-emitting properties of quantum dots can be applied in solar energy by helping more efficiently harvest sunlight.
It’s an obvious truism, but one that may soon be outdated: The problem with solar power is that sometimes the sun doesn’t shine. Now a team at Massachusetts Institute of Technology and Harvard Univ. has come up with an ingenious workaround: a material that can absorb the sun’s heat and store that energy in chemical form, ready to be released again on demand.
Porous silicon manufactured in a bottom up procedure using solar energy can be used to generate hydrogen from water, according to a team of Penn State Univ. mechanical engineers, who also see applications for batteries, biosensors and optical electronics as outlets for this new material.
Stanford Univ. scientists have found a new, highly efficient way to produce liquid ethanol from carbon monoxide gas. This promising discovery could provide an eco-friendly alternative to conventional ethanol production from corn and other crops, say the scientists. Their results are published online in Nature.
People who pack their cars and drive like Clark Griswold in National Lampoon’s “Vacation” pay a steep penalty when it comes to fuel economy, according to a report by Oak Ridge National Laboratory. Researchers tested vehicles at a variety of speeds with different configurations of load and tire inflation. While the findings were not unexpected, they serve as a reminder of how drivers can save money by taking simple measures.
A major factor making driving difficult is hazards that are sudden and hard to predict. The wrong choice in this situation, known as the “dilemma zone,” may lead to crashes. Roadside and in-vehicle display warning systems may help drivers handle these hazards by predicting their occurrence and providing advanced warning to the driver, according to a new study.
New research shows that nanostructures could enable more light to be directed into the active layer of solar cells, increasing their efficiency. Prof. Martina Schmid of Freie Univ. in Berlin has measured how irregularly distributed silver particles influence the absorption of light. Nanoparticles interact with one another via their electromagnetic near-fields, so that local “hot spots” arise where light is concentrated especially strongly.
Navy researchers have recently demonstrated sustained flight of a radio-controlled P-51 fighter replica fueled by a new gas-to-liquid process that uses seawater as carbon feedstock. The fuel is made using an innovative and proprietary electrolytic cation exchange module that separates gases from water at 92% efficiency. Catalysis converts the gases to liquid hydrocarbons.
Solid-state dye-sensitized solar cells have shown their potential in achieving high efficiency with a low cost of fabrication. Degradation of these cells shortens lifespan dramatically, however, and the causes of this are not well understood. After a detailed analysis, researchers in Okinawa have determined which material in the cells was degrading, and why.
Chemists have found that cellulose, the most abundant organic polymer on Earth, can be heated in a furnace in the presence of ammonia and turned into the building blocks for supercapacitors. The new process produces nitrogen-doped, nanoporous carbon membranes, which act as the electrodes of a supercapacitor. The only byproduct is methane, which could be used immediately as a fuel or for other purposes.
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