How do you build a hydrogen fuel cell?
601656
are  you doing some kind of project on fuel cells?I did a project on hydrogen 3 years ago and had the same problem .What i did at the end was made the design look like a fuel cell(the pem and catalysts) kept some normal cells underneath it and connected it to a bulb.Believe me , everyone thought it was a real fuel cell
81789
The simplest way is to apply a spark to it in a sealed container then allow it to cool. The hydrogen will combust, creating water vapour which will condense out as it cools. Collect the condensate and drink.
996953
Basically its a way of creating a battery by using a styrofoam cup and some other materials. To read how to make one, go to the site below.\n\nwww.exo.net/~pauld/summer_institute/summer_day15current/saltwaterbattery.html
991204
by splitting water molecules and collecting the H
367911
For example, hydrogen burns in oxygen to form water vapor. \n\n2H2(g) + O2(g) -> H2O(g) \nHow much hydrogen must be burned to form 1.00 L of water vapor at 1.00 atm pressure and 3000C? \nTo work this problem, we need to figure out how many moles of water vapor we need to form. Use the ideal gas equation to compute this: \n\nPV = nRT \n1.00 atm * 1.00 L = n*0.0821 (L*atm/mol*K)* 473 K \nn = 0.0258 moles \nThus, we need to form 0.0258 moles of water. Now it's just a basic stoichiometry problem: for each mole of water formed, you need 2 moles of hydrogen gas, so 0.0258 moles water * 2 moles H2/1 mole water = 0.0516 moles of hydrogen \n\n=====================================================\n\nthis will help you a lot\n\nhttp://www.chem.hawaii.edu/asato161/Ch10NotesP2.pdf#search='Gas%20Stoichiometry%20PV%3DnRT'\n\nhttp://members.aol.com/profchm/gasstoic.html
803196
Fuel Cell, device in which the energy of a chemical reaction is converted directly into electricity. Unlike a battery, a fuel cell does not run down; it operates as long as fuel and an oxidant are supplied continuously from outside the cell. Several companies are developing fuel cells that they hope will replace conventional internal-combustion engines in automobiles over the next few decades.\n\nA fuel cell consists of an anode, the positive end of an electric circuit, and a cathode, the negative end of an electric circuit, separated by an electrolyte. Electrolytes are substances that allow ions (particles formed when a neutral atom or molecule gains or loses one or more electrons) to pass through them. Fuel flows to the anode, and an oxidant flows to the cathode. The chemical reaction between the fuel and the oxidant produces an electric current. Various fuels may be used, but research and development in recent years has focused on hydrogen fuel cells.\n\nIn a hydrogen fuel cell, hydrogen is supplied to the fuel cell’s anode, and an oxidant, commonly the oxygen present in air, is supplied to the cathode. The fuel cell strips electrons from the hydrogen atoms. These electrons move from the anode through the electric circuit to the cathode, creating an electric current that can be tapped to provide power. The electron-deficient hydrogen atoms meanwhile pass through the electrolyte to the cathode. There the electrons that passed through the circuit recombine with the electron-deficient hydrogen atoms. Oxygen (from the air) reacts with this reformed hydrogen, producing water. Water produced at the cathode has to be removed continuously to avoid flooding the cell.\n\nHydrogen fuel cells hold great promise as low-pollution automobile engines if certain difficulties can be overcome. Water, the only waste product of a hydrogen-oxygen fuel cell, is nonpolluting and can be used to cool the engine. The oxygen the cells need is readily available in air. Hydrogen, however, is not so readily available, and there is no existing delivery system to convey hydrogen to all the places people would need it to power their cars. In addition, pure hydrogen is not abundant enough to provide power for all the cars on the road today. Instead, hydrogen would need to be extracted from other substances, a process that requires energy and produces pollutants.
788768
Just the usual stuff.  Use an electrolyte (H2SO4/HNO3), a couple of electrodes, a reduction table of half cell potentials, and some electricity.
530435
Get a glowing splint (piece of wood that is still burning out). \n\nPlace near the oxygen and it will glow brighter as it uses the oxygen to burn more.\n\nPlace near the hydrogen and you will hear a 'pop' sound. \n\nHope that helps! :)
51965
Hmm...  If I remember the physics right, it goes like this: Take two parts hydrogen and one part oxygen and mix them in a chamber with a catalyst and a proton exchange membrane and you get water and electricity.
732233
Producing hydrogen electrolytically.  A very current topic and of interest to all persons paying for gasoline.
786369
Solar cells convert light into electricity.\n*\nFuel cells convert hydrogen into electricity. Except there's another step; there is no source of free hydrogen for fuel cells, so hydrogen must be 'made' by using electricity to separate hydrogen from water.\n*\nThis means that fuel cells are not a source of energy - rather they are a means of reclaiming stored energy, much like a battery.\n*\nThis is a principal difference. The solar cell provides essentially free energy. The fuel cell does not.
76253
Hope you find this helpful read through it its pretty basic but it will a good idea of how they work\n\nhttp://www.howstuffworks.com/fuel-cell.htm
675961
Hydrogen is a combustible gas and can be used to generate energy.  Hydrogen powered cars are presently being researched and are called 'fuel cell cars'.\n\nYou can get hydrogen from brine (salt water) by the process of electrolysis.  To find out more about this see:\nhttp://www.scienceaid.co.uk/salt.html
183390
Note that fuel cells do not operate on a thermal cycle. The fuel cell contineously replenishes its rxtant by converting energy from an external source (hydrogen /Oxygen) to electricity (1st law in ref to cons of energy)
457371
Fuels cells will allow us to creat energy without using fossil fuels and the waste it creates while processing these fuels. By combining oxygen and hydrogen effecitively, energy is created, with virtually no waste. Unlike fossil fuels, there is no limit to the the oxygen and hydrogen that surrounds us. The end result will be cleaner fuel without shortage of supplies and the cost of this will be more affordable to all. Fuel cells are currently being used and tested in space travel by NASA engineers. Fuel cells are the future! A bright one at that!
491732
First, commercial production of methanol is accomplished by the catalytic reduction of CO according to the following equation:\n\nCO + 2H2 ---> CH3OH\n\nSo yes, it's very possible to add carbon to your hydrogen to make methanol. In fact, it's constantly being done on the industrial scale. Most catalysts are based on a mixture of Cu, ZnO and alumina, although the precise details of the best catalysts are something of a trade secret.\n\nThere are still a couple of things to keep in mind with your proposal. The first is that H2 is *very* expensive to make by electrolyzing water. If you use an applied potential of 2.5V it will take around around 7.4 kWh of electricity to electrolyze 1 liter of H2O (assuming I did my math right). That's a *lot* of expensive electricity to replace only a liter or so of conventional fuel. Unfortunately, until technology improves there is really isn't any practical way to generate that much electricity by solar or wind power.\n\nWhile I am a big proponent of alternative fuels, it's often not as simple as it seems to replace traditional fossil fuels. It's generally easy to convert energy from one form to another (for example electricity to hydrogen to methanol), but it doesn't solve the basic problem of getting the energy to begin with. Still, it's a problem we need to work on since almost all of our energy comes from non-renewable resources.
991620
http://video.google.com/videoplay?docid=-2134266654801392897\n\nmentos and diet soda, baking soda and vinegar.\n\nthough i'm wondering how the hell you're supposed to drop elemental hydrogen in water.  if you make it a solid that would be new and it wouldn't do anything...