I have been working on photo-electrochemical (PEC) hydrogen generation. Can anybody tell me which is the best way to measure the generated hydrogen in the PEC cell? Is there any device to measure the liberated H2 and O2 at the respective electrodes?

Waiting for your reply.
Thanks!!

In regards to the material in the article it sounds a lot like Chemalloy which is a material that was created in the 1950’s as an aluminum welding material. It was found that if it was submerged in water not only did it naturally break the water to release hydrogen and water with no loss of the material it would also create an electrical charge.

Bob

All produced gas volume must be not more than this one, just evaporated over the electrolyte level and this in the connecting pipe, and all this must be not more than a couple of litres and has to be burned or converted into power trough HFC immediately, without putting ANY quantities in tank !

If you have a liable combination of a bubbler and a backflame arrestor, no accidents are to be happen ever.

Also you must have liable gauges for combined pressure/power measurement, and when the pressure increases, the power will be reciprocally decreased, thus a continued balance will be obtained. Also the temperature must be connected with the power supply and in case of overheating the power must be switched off and an alarm to be on.

Addititonal gauges as digital pH-meter, a circulation pump with changeable/washable filter and a manometer after the filter are essential. All critical levels must be signalized trough alarm.
To collect hydrogen in a drum is so, so stupid, that I just refuse to comment such a joke.

Heating water to high enough temperatures can cause the atoms to turn into a gas with no added electrical input. Read this article for beginning information on thermolysis: http://en.wikipedia.org/wiki/Thermolysis

All connections in the space of the box must be even not soldered, but WELDED only, with material, same or similar to the plate’s material. Otherwise, if soldered with a solder, made of different metals, you produce a battery, which have its own electrolytic process, interfering with the main one, making a real mess, and finally connection will be disintegrated soon, often accompanied with explosion.

All bolt power connections, and such between different metals cables, must be led out of the electrolyzer box. If you want to use mesh, even if you weld it to the power connection cable, you’ll have a shock current right next to the welded area, with a heavy overheating. Additionally, around this area you’ll observe the most intensive electrolytic effect. The thin wires of the mesh won’t resist such combined electro-thermal shock and sooner or later will wear out and cut.

About the high work temperature – the best level for me is about 40-60 deg.C. After 80 degrees, especially in a fixed resonance range, you have an uncontrollable avalanche effect of sharp increasing the process, often ending with explosion again.

I tried to use different freq’s tranducers, but I didn’t received so good results – most of the bubbles were still staying sticked to the plates, even the plates were ringing loudly as bells; the best result I had with many thin high-pressure jets, flowing over the plates. They blew off the bubbles immediately.

I never used platinum as electrode, but I used 24-carat gold. It is absolutely perfect and eternal, and the results are fantastic. But only the solid plate. Gold plated copper or nickel disintegrates after some time of work. And here comes the biggest, overwhelming problem with the price.

There are several elaborations with cheap polymer electrodes. A porous ceramic plate, soaked with polivinyl, shows good conductivity performance in acids, but still not enough, and is still not well stabilized, but it is a pretty good base for future elaborations.

A new invention is on way, where two different plastics, sticked together, show a good conductivity on their contact surface. For the moment, the old good SS 316L solid plate with added extra molybdenum, insulated in separate cells, even though not very cheap, looks like the best choise as a quality/price ratio.

Dear Ray, you have absolutely no need to capture and stockpile the gas if you use HHO generator, because it produces the gas “on demand”. Instead of gas tanks transportation, you should transport the generator itself or its modules to that point, where gas /power generation is needed for the moment, and to produce as much as it needed for the moment, without dangerous and senseless stockpiling.

You have listed correctly the existing heat conversion principles – Stirling engines, steam engines, steam turbines, and Zeebeck-Peltier thermoelectric modules. I should exclude the clumsy steam engine. Thermoelectrics are very elegant, but still showing a very feeble conversion performance – max 12%. Stirlings, with their 38% and especially the well proficient good old simple steam turbines with 47% electrical and over 90% overall cogenerating performance, seem to be the only miserable choice we have for the moment. But I should add the hydrogen fuel cells, especially the Molten Carbonate (MCFC) ones. Look at http://www.fuelcellenergy.com . That’s the future. If you combine this technology with a HHO generator, you’ll receive the cheapest ever power, directly, without intermediate burning the gas, and you’ll have still additional wasted 400 degrees C steam, to use it for heating, or for additional power generation, which launches the MCFC’s COP up to 75%.

I don’t know what this graphite paint is about, it could maybe protect the surface, but all the graphite brands are soluble in most liquid electrolytes when they work as electrodes.

I also tried to mix graphite powder in many non-soluble compounds as epoxy or bakelite resins, but the only result was complete loose of electrical conductivity.

These are the facts of what I have done so far with just household items. What could G.E., Westinghouse and Dr. Chu do if they really wanted to? That won’t happen easily because it is too simple, too cheap and can provide energy to power any farm or cabin in the woods without a meter, without a meter, without a meter, all over the world. This will happen though, because “You can fool all the people some of the time, some of the people all of the time, but you can’t fool all the people all the time. Thank you all; I hope this is of some help.