Another innovative feature has been added to the world's first practical "artificial leaf," making the device even more suitable for providing people in developing countries and remote areas with electricity, scientists reported in New Orleans on April 8. It gives the leaf the ability to self-heal damage that occurs during production of energy. Daniel G. Nocera, Ph.D., described the advance during the "Kavli Foundation Innovations in Chemistry Lecture" at the 245th National Meeting & Exposition of the American Chemical Society.
Nocera, leader of the research team, explained that the "leaf" mimics the ability of real leaves to produce energy from sunlight and water. The device, however, actually is a simple catalyst-coated wafer of silicon, rather than a complicated reproduction of the photosynthesis mechanism in real leaves. Dropped into a jar of water and exposed to sunlight, catalysts in the device break water down into its components, hydrogen and oxygen. Those gases bubble up and can be collected and used as fuel to produce electricity in fuel cells.
"Surprisingly, some of the catalysts we've developed for use in the artificial leaf device actually heal themselves," Nocera said. "They are a kind of 'living catalyst.' This is an important innovation that eases one of the concerns about initial use of the leaf in developing countries and other remote areas."
Nocera, who is the Patterson Rockwood Professor of Energy at Harvard University, explained that the artificial leaf likely would find its first uses in providing "personalized" electricity to individual homes in areas that lack traditional electric power generating stations and electric transmission lines. Less than one quart of drinking water, for instance, would be enough to provide about 100 watts of electricity 24 hours a day. Earlier versions of the leaf required pure water, because bacteria eventually formed biofilms on the leaf's surface, shutting down production.
"Self-healing enables the artificial leaf to run on the impure, bacteria-contaminated water found in nature," Nocera said. "We figured out a way to tweak the conditions so that part of the catalyst falls apart, denying bacteria the smooth surface needed to form a biofilm. Then the catalyst can heal and re-assemble."
Nocera said that about 3 billion people today live in areas that lack access to traditional electric production and distribution systems. That population will grow by billions in the decades ahead. About 1 billion people in the developing world already lack reliable access to clean water. Thus, a clear need exists for a simple device like the artificial leaf that's compatible with local conditions.
Of more than 4,000 academic papers published over 20 years, 97.1% agreed that climate change is anthropogenic (RT @guardianscience: Climate research nearly unanimous on human causes, survey finds http://t.co/vHTRajLizK)...
we know. But how fast will society adapt to the serious consequences of climate change, famine, tornadoes, flashfloods, drought. We need the same change as a war economy otherwise we won't make it.
China’s water resources are running scarce. Farming and other human activities are turning large parts of the country into deserts and forcing residents to migrate. The FT's Leslie Hook reports from Gansu province.
turning China into desert with 1.4 billion, disaster looms.
The Guardian Gill Lewis: 'Our own survival depends upon protecting our environment' The Guardian Yet, their survival depends upon the protection of the many smaller animals and plants living within fragile habitats.
New cables 'expose' US govt lobbies worldwide for Monsanto, other GMO corps. Get short URL. Published time: May 14, 2013 20:38. Edited time: May 15, 2013 06:14. Jane Michalek (R) drinks soup during an eat-in protest in front of.
A monitor in Hawaii registered 400 parts per million of carbon dioxide in Earth's atmosphere, higher than ever above the "safe" 350 ppm level. (RT @MotherJones: We've hit the carbon level we were warned about.
with Bono U2 siding with Monsanto, and governments not going for real solutions, Mankind will shipwreck.
(Phys.org) —Temperatures in central China are 10 to 14 degrees Fahrenheit hotter today than they were 20,000 years ago, during the last ice age, UCLA researchers report—an increase two to four times greater than many scientists previously thought.
by the time the know it willl be to late.Climate feedback.
Obama's Arctic strategy sets off a climate time bomb The Guardian Despite giving lip service to the values of environmental conservation, the new document focuses on how the US can manage the exploitation of the region's vast untapped oil, gas and...
we never trusted Obama and once more he shows to be a Wallstreet banking oil whore.
Former senior official John Ashton attacks government for 'spooking potential investors' in energy infrastructure (UK's climate change adaptation team cut from 38 officials to just six #green http://t.co/hIatTPZvy8)...
Camron NWO puppet, in the near future you will pay and billions with you.
April 25 (Reuters) - Heavy use of the world's most popular herbicide, Roundup, could be linked to a range of health problems and diseases, including Parkinson's, infertility and cancers, according to a new study.
forget the could, Cambridge research linked all kinds of diseases with Roundup Ready from Monsanto, but it was kept out of the news!!!!! Corporate MSM didnt report when scientists held a press conference!
The Guardian Climate research nearly unanimous on human causes, survey finds The Guardian Authors of the survey, published on Thursday in the journal Environmental Research Letters, said the finding of near unanimity provided a powerful rebuttal to...
Diplomatic cables reveal aggressive GM lobbying by US officials The Guardian Subscribe. Subscribe to the Guardian · iPhone app · iPad edition · Kindle · Extra · Guardian Weekly · Digital edition · The Guardian home.
we need an Oilleaks to make people aware of the dirty oil lobby!
UK signals support for EU import of Canadian tar sands oil The Guardian Subscribe. Subscribe to the Guardian · iPhone app · iPad edition · Kindle · Extra · Guardian Weekly · Digital edition · The Guardian home.
At the G8 Summit held two weeks ago at Camp David, President Obama met with private industry and African heads of state to launch the New Alliance for Food Security and Nutrition, a euphemism for monocultured, genetically modified crops and toxic...
I will never buy a CD from U2 Bono now really sucks for me.