Showing 20 articles starting at article 341
< Previous 20 articles Next 20 articles >
Categories: Energy: Technology, Engineering: Graphene
Published Copper-based catalysts efficiently turn carbon dioxide into methane


Copper-based catalysts developed by materials scientists help speed up the rate of carbon dioxide-to-methane conversion.
Published Nanofluidic device generates power with saltwater



There is a largely untapped energy source along the world's coastlines: the difference in salinity between seawater and freshwater. A new nanodevice can harness this difference to generate power.
Published Efficient fuel-molecule sieving using graphene


A research team has successfully developed a new method that can prevent the crossover of large fuel molecules and suppress the degradation of electrodes in advanced fuel cell technology using methanol or formic acid. The successful sieving of the fuel molecules is achieved via selective proton transfers due to steric hindrance on holey graphene sheets that have chemical functionalization and act as proton-exchange membranes.
Published No shortcuts: New approach may help extract more heat from geothermal reservoirs


Geothermal heat offers a promising source of renewable energy with almost zero emissions, but it remains a relatively expensive option to generate electricity. A new technique may help prevent 'short-circuits' that can cause geothermal power plants to halt production, potentially improving the efficiency of geothermal power, the researchers said.
Published New method for purifying drinking water could be used in disaster zones


Scientists have developed a new desalination method that pumps water through a membrane without using any external pressure.
Published Researchers reveal the origins of zirconium nitride's superior performance


A group of researchers have unraveled the mysteries behind a recently identified material -- zirconium nitride (ZrN) -- that helps power clean energy reactions. Their proposed framework will help future designs for transition metal nitrides, paving a path for generating cleaner energy.
Published One-atom-thick ribbons could improve batteries, solar cells and sensors


Researchers created nanoribbons made of phosphorus and tiny amounts of arsenic, which they found were able to conduct electricity at temperatures above -140 degrees Celsius, while retaining the highly useful properties of the phosphorus-only ribbons.
Published Material would allow users to 'tune' windows to block targeted wavelengths of light


Researchers have demonstrated a material for next generation dynamic windows, which would allow building occupants to switch their windows between three modes: transparent, or 'normal' windows; windows that block infrared light, helping to keep a building cool; and tinted windows that control glare while maintaining the view.
Published Making contact: Researchers wire up individual graphene nanoribbons


Researchers have developed a method of 'wiring up' graphene nanoribbons (GNRs), a class of one-dimensional materials that are of interest in the scaling of microelectronic devices. Using a direct-write scanning tunneling microscopy (STM) based process, the nanometer-scale metal contacts were fabricated on individual GNRs and could control the electronic character of the GNRs. The researchers say that this is the first demonstration of making metal contacts to specific GNRs with certainty and that those contacts induce device functionality needed for transistor function.
Published Sustainable energy for aviation: What are our options?


Scientists and industry leaders worldwide are looking for answers on how to make aviation sustainable by 2050 and choosing a viable sustainable fuel is a major sticking point. Aerospace engineers took a full inventory of the options to make a data-driven assessment about how they stack up in comparison. He reviewed over 300 research projects from across different sectors, not just aerospace, to synthesize the ideas and draw conclusions to help direct the dialogue about sustainable aviation toward a permanent solution.
Published Efficient next-generation solar panels on horizon following breakthrough


A scientific breakthrough brings mass production of the next generation of cheaper and lighter perovskite solar cells one step closer.
Published New Si-based photocatalyst enables efficient solar-driven hydrogen production and biomass refinery


A research team has achieved a significant breakthrough in the development of a hybrid silicon photocatalyst.
Published Electrons take flight at the nanoscale


A study showing how electrons flow around sharp bends, such as those found in integrated circuits, has the potential to improve how these circuits, commonly used in electronic and optoelectronic devices, are designed.
Published Combustion powers bug-sized robots to leap, lift and race


Researchers combined soft microactuators with high-energy-density chemical fuel to create an insect-scale quadrupedal robot that is powered by combustion and can outrace, outlift, outflex and outleap its electric-driven competitors.
Published Cheap and efficient catalyst could boost renewable energy storage


Storing renewable energy as hydrogen could soon become much easier thanks to a new catalyst based on single atoms of platinum.
Published Engineers grow full wafers of high-performing 2D semiconductor that integrates with state-of-the-art chips


Researchers have grown a high-performing 2D semiconductor to a full-size, industrial-scale wafer. In addition, the semiconductor material, indium selenide (InSe), can be deposited at temperatures low enough to integrate with a silicon chip.
Published How wind turbines react to turbulence


The output of wind turbines can rise or fall by 50 per cent in a matter of seconds. Such fluctuations in the megawatt range put a strain on both power grids and the turbines themselves. A new study presents a new stochastic method that could help to mitigate these sudden swings and achieve a more consistent electricity production.
Published Predictive model could improve hydrogen station availability


Consumer confidence in driving hydrogen-fueled vehicles could be improved by having station operators adopt a predictive model that helps them anticipate maintenance needs, according to researchers.
Published Golden future for thermoelectrics


Researchers discover excellent thermoelectric properties of nickel-gold alloys. These can be used to efficiently convert heat into electrical energy.
Published Making hydrogen from waste plastic could pay for itself


Researchers have found a way to harvest hydrogen from plastic waste using a low-emissions method that generates graphene as a by-product, which could help offset production costs.