


Isn't science wonderful? The day after I bashed fuel cell tech for being impractical, MIT scientists break the news of a major discovery that might change everything. In what’s being called a “revolutionary leap,” MIT chemistry professor Daniel Nocera and his team of researchers have figured out how to use solar energy to separate hydrogen and oxygen in water, in a unique process that can be done at room temperature and pressure, without using any exotic materials.
This could be an easy route to artificial photosynthesis, someday producing hydrogen for clean, cheap power. The goal is to use the technology in homes within ten years, where solar energy could be used during the day to power this atom-splitting, and then the resulting hydrogen could be used at night to run a fuel cell to generate electricity. That hydrogen could also be used for fuel cells in cars.
Looks great, but so far, the system is using electrical power from an outlet rather than solar energy, still needs an expensive platinum electrode to make the hydrogen from hydrogen ions, and the oxygen is created too slowly. However, Nocera says this is so easy to set up, the problems should be solved quickly. See him in this video. This could change the world. Hurry this up, guys — prove me wrong.
Via Popular Mechanics, Technology Review, and MIT
By SethEden at 1:19 PM ON 08/01/08
It's not Atom Spliting, That is a NUCLEAR process!
Atom spliting produces thousands of times more energy, and releases copious amounts of Neutrons.
Also Hydrogen cannot participate in Fission based nuclear reactions because it does not normally carry any neutrons, unless you are refering to Deuterium or Tritium. Either way these isotopes are far better off participating in Fusion based reactions then Fission based reactions, unless you want to try and split the protons and get the energy from the quarks themselves. Then I say good luck to you! I hope you have a damn good gamma-ray shield to stand behind, and your going to need something a little more juice then the 110volt outlet in your garage!
Dude go back to high school and learn about the real science before you go around bashing what you don't even know how to talk about.
~Seth
http://Blog.SethEden.com
By DelosWorld at 2:02 PM ON 08/01/08
Ignoring the atom splitting remark (geez, water is a molecule!) the efficiency inherent in a hydrogen storage system is further degraded by the amount of energy it takes to compress the hydrogen and store it in a reasonable volume (and the same would apply to vehicles...). Perhaps storing the hydrogen in ion form in solution is actually a good thing for a fuel cell since it would preclude the use of high pressure cannisters, assuming you can store enough hydrogen in a liquid and not have it consume all the space in your basement. I'm not a chemist but presumably it takes additional energy to pair up the hydrogen ions in solution with electrons to convert them back to a gas which is required to power a fuel cell. Anyway, as I stated in the "fuel cell cars are a fraud" thread hydrogen might be good for niche applications but questionable for widespread use. Fraud is such an inappropriate word to use when discussing science or technology.
A technology with much better potential for efficient, reliable, and long-lifetime energy storage falls in the realm of super-capacitor technology. For example in a Tesla electric car you could replace the 50 kWh LI-Ion battery pack with a supercapacitor that is roughly one third the volume. So it's not unreasonable to expect that eventually a super-capacitor the size of a stove or refridgerator could keep your home powered for several days after being charged up by solar panels, wind generators, or whatever other crazy scheme you can come up with to generate electricity in, on, or around your home. Of course widespread use always depends on ultimate costs, reliability, safety, and practical use.
By DaveinTX at 2:36 PM ON 08/01/08
Charlie, I wanted to comment on both this and your "bashing" of fuel cell technology. First this is pretty much how it is going to happen. Cheap "free" methods of breaking hydrogen from other compounds since hydrogen seems to be completely spoken for. As for why not just eliminate the middle man and just have electric cars is easy...I don't like driving for 200 miles then waiting 4-8 hours to drive another. I can "fill" my car in minutes using hydrogen. That is why it is the miracle cure. Certain aspects of electrical dynamics and chemical batteries prevent the ability to charge a car in minutes. If you wanted to drive from Texas to California and would have to spend the night where ever you were after 200 miles to charge up, I think you would agree with me. Now granted the hydrogen highway as it is being called isn't exactly expansed accross the country, but it is easier to build up this infrastructure than a bed and battery every 200 or so miles. Sorry for the spelling.
Thanks,
Dave in Texas
By borddog2142 at 8:27 PM ON 08/01/08
Is this not old news? Really the same day I found out about fuel cell tech i thought this up. And drew it up. And that was 6 years ago... (im only 21, so highschool. And because fuel cell tech has been around forever i assumed this "brilliant idea" was already out. How is this scifi worthy? isnt this idea just duh, but like 35 years ago?
By Yogurt at 4:35 AM ON 08/02/08
Where's my thank you? I'm the one who gave everyone the link. I posted the link on your fraud report before you could even wake up and bash our President with the morning coffee.
By dee at 12:10 AM ON 08/04/08
ok too the guy at the top of the page the idea and process of breaking up water molocules into oxogen and hidrogen is not a complicated process and any one who has taken a good high school chemistry class should know that why because i saw the process preformed and the experiment ended with a small bang when my teacher lit the hydrogen on fire the guys at MIT are just adding a few steps to that
By damo at 2:19 AM ON 08/04/08
Wow, apart from comments 2 and 3, which were informative, they all just seem to be from guys who want to show us how very clever they are. What a bunch of wankers!
damo:
Wow, apart from comments 2 and 3, which were informative, they all just seem to be from guys who want to show us ho...More »