Originally Posted by Don Shillady
Tech1, Good to chat with you. For some reason my popup blocker will not allow me to read your other message but here is a GUESS at what the catalyst may be. In the later years of my research career I worked on lanthanide compounds which have a number of unusual magnetic and electric properties. Elements 57 to 71 increase in the number of electrons in a "4f" shell which can hold up to 14 electrons based on the parent of the row in the periodic table beginning with Lanthanum, No. 57, hence the name "Lanthanides". The 4f electron shell is not tightly bound so the electrons are in a "soft" electronic environment and they are close to being "free electrons". The compounds containing these metal ions have pale colors and tend to be strongly magnetic, often more magnetic than iron. In addition the whole row of these 14 atoms tend to be +3 ions and studying the chemistry of them shows them to all have very similar chemical properties with +3 ions. In fact when these elements are found in nature they are all together since they have similar chemistries. The U.S. has limited amounts of these elements found along the Ariz.-Calif. border at Mountain Pass, but China and India have vast deposits. HOWEVER, a principle in atomic Physics shows that half filled shells are particularly stable and the middle of the row is Gadolinium which has 7 (unpaired) electrons in a half filled shell and it is particularly stable and is essentially colorless in the human eye range. NOW, consider Europium which is just one electron less than Gadolinium but is still a +3 ion which means it has 6 of the 4f electrons while Gadolinium has 7 (half of 14). You have to remember that electrons are -1 charge so adding an electron (from current) to Eu(+3) makes it into Eu(+2) by neutralizing one of the + charges. Soooooo, after this long lesson, it is well established that Eu(+2) can exist where one electron fills in the 4f shell and it becomes like the very stable Gd(+3). It has been demonstrated many times that when Eu(+2) comes into contact with H2O it will react with the water to directly split it into O2 and H2! There has been a lot of research in Israel, where there is abundant sunlight, to use the Eu(+3)->Eu(+2) reaction due to some reaction with sunlight and then to make O2 and H2 when the Eu(+2) contacts water. This is one avenue of research to improve solar energy efficiency and I am sure there are quite a few papers on this peculiar property of Eu(+2) compounds. Note if there is a + ion in solution there has to be a - ion somewhere in there too or you would have "lightening in a bottle" so there is some sort of chemistry which has - ions along with the Eu(+2) but the real business part of the compound is the Eu(+3)/Eu(+2) part. Sooooooooo, I AM GUESSING that the powder is probably EuCl3 and is probably pale purple or mostly white with a slight pink/blue tinge and during the electrolysis some Eu(+2) is generated in the solution of water and as soon as the Eu(+2) is formed it cleaves H2O into H2 and O2 and is itself oxidized to Eu(+3) but then another electron comes along due to the current flowing in the cell and it becomes Eu(+2) again ready to cleave some more water while the amount of Eu(+3/+2) remains constant and stays in the cell and is not consumed. That is the definition of a CATALYST, a material that enhances a reaction of other things but is not consumed itself. Soooooooooo, I am guessing the catalyst is EuCl3 or some other Europium compound. If I am guessing correctly and this type of "Hydrogen on demand fuel" device gets the safety problem solved there may be a demand for Eu greater than the U.S. Mountain Pass site can provide and Eu may become a strategic material and trade of lanthanides from China may be big business. Interestingly there are a lot more research papers about lanthanide chemistry in China than other places because in China they have so much of this stuff that they have folks researching how to use it, but if Eu(+3/+2) takes off you ought to have stock in Moly-Corp which owns the Mountain Pass U.S. site. Unfortunately I have little funding to invest and am on a fixed income. Well you asked and you pressed my button on ten years of research so I am giving you my best guess. I am guessing the compound is the trichloride of Eu, EuCl3 as Eu(+3)Cl(-1)3, which is water soluble while another common form of Eu is the oxide as Eu2O3 which is about as soluble in water as brick dust! You can buy EuCl3 from chemical supply houses and it is not particularly expensive (yet) or particularly poisonous, but don't eat it or drink the solution (Hah!)
In return for this potentially useful information can anyone tell me where to drill the holes in a '29 Ford firewall for the rods that hold the radiator?
Don Shillady
Retired Scientist/teen rodder