Very true indeed. However the problems one encounters there is that platinum is VERY expensive and our platinum reserves are shrinking on a daily basis. The high cost of the platinum will result in a high cost for the fuel cell which will turn people off of it. The biggest problem with solar fuel cells is reliability. If you have cloud cover one day, you generate ZERO energy. The only place that a fuel cell can be reliably run is in a desert with zero cloud cover. That limits the locations in which the fuel cells can be stored and will cause issues just like we currently have with oil. (Where a select few countries are able to produce the oil, and as a result they rape everybody financially over it). It's a similar situation with wind power. Where there is a constant, uninterrupted flow of wind the use of wind power is very efficient and very effective. With any energy source you need to have it be reliable. If you stop generating electricity when the sun goes down, or when there's a cloud overhead, or when it's foggy outside, you won't have a very reliable source. That's the big thing that research is attempting to overcome. Once they can do that then there won't be too much of a problem.
when you said about placing fuel cells in deserts you meant solar cells right?? (hehe have made that mistake too on several occasions)
Solar cells do, as a matter of fact, generate a voltage and some current in cloudy weather. The voltage is relatively unchanged but the intensity of light affects the amount of current that a solar cell generates. A solar cell generates electricity through photons, so any intensity light will actually generate some electricity, there are just some intensities that will make the process more efficienty. Solar cell technology is getting far better, now they are creating polymer based solar cells which are highly flexible and even fuel cells that can be printed on a surface. the cost has gone down from several dollars to produce a solar cell to only $3 per watt (still production is a major factor, materials are relatively cheap, silicon is the second most abundant element on the surface of the planet)
There are also other methods of generating electricity, such as Central Receiver Systems whose main factor is probably space. The way it works is by having a towers several hundred feet in the air that stors salt. there are a series of magnifying mirrors around this tower, called heliostats, which are aimed at the tower. The tower is capable of heating to perhaps 1000
oC(around there) and the system can continue on operating through out the night on the heat collected in the day. The molten salt will heat water stored underground, which turns a turbine and privides hot water. The system is capable of generating a few megawatts of electricity, enough to run a small town. Currently there are two or three such systems i have heard about, 2 of them are located in celifornia, perhaps the most famous is Solar One i think is located in Joaquin, California.
The amazing ability for fuel cells to generate electricity at efficiency levels very close to 100% makes it an incredeble choice for transportation. They are capable of operating as long as hydogen is supplied.
It is true, current prices of platinum are discoraging some people, but fuel cells can go nano. In fact i have seen a 3 Kw fuel cell that weights less than 5 pounds, it uses less platinum than a normal 3 Kw stack that could weight atleast 10 times. There are also several advancements in the fuel cell industry (it seems as if the possible market created in California, where they are in the process of making hydrogen pumps, has created an outburst of entrepeneuty in the fuel cell industry) some examples includes feats by GM, which recently showcased what it considers to be one of the smallest and most efficient fuel cell stacks for automotive purposes, made with platinum and gold placed in a certain arrangement (i did not find out how much energy it produced atleast not yet). It is evident that as the size of a fuel cell gets smaller the importance of platinum decreases, the cost of material decreases, but the labor increses. and the major problem with fuel cell stacks is that they have to be hand assembled (a process taking almost an entire day to assemble just one fuel cell). Ballard and several other fuel cell industries hope that robots will be able to help in the future. In fact Ballard (i think it was ballard or else another fuel cell giant) hopes to decrease the cost of fuel cell stacks from the current $1000 per Kw to $500 Kw by 2010, and that in the near future it will decrease to $50 per kilowatt. Of course time restraints depends on how much research we dedicate to fuel cells.
In fact we may see fuel cells in our cellphones and laptops as soon as 2007-2008. Methanol fuel cells are incredebly small, do not require water to operate, just a current, and increases the efficiency of batteries pretty significantly. the battery life of a laptop can increase from 2 hours to 10-12 hours (pretty significant). Also Stanfford University has been able to create a fuel cell that is i think a few microns or picometers in lenght, though of course it would generate very little electricity but if it were arranged in a parrallel or series circuit the size of a fuel cell stack would be incredebly small and the amount of energy produced would be larger.
the capability of fuel cells in our futures depends greatly on research, and the government involvement to create such technological feats.