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Author Topic: KARPEN PILE  (Read 230978 times)

profitis

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Re: KARPEN PILE
« Reply #435 on: August 11, 2014, 04:14:00 PM »
You will get a voltage.that is due the NEMCA effect.how long it will take to recover I don't know but it absolutely will recover to some stable reading. You should never show voltages here that haven't been shorted FIRST then adequately rested because that is their true equilibrium value.that voltage that you showed in your last video is in fact meaningless because that was before shorting.hydrogen dissolves in platinum,it does not dissolve in carbon although it adsorbs loosely with it hence there will be something.with gold here you will without a doubt get something stable and permanent.gold does not dissolve h2

pomodoro

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Re: KARPEN PILE
« Reply #436 on: August 11, 2014, 05:11:53 PM »
OK I shall disconnect short tomorrow and show the voltage after some hours. Hydrogen will then be pumped through while shorted.  I'll still go for roughly the same voltage on Pd/Pt and C even with hydrogen.  I reckon all the catalytic Pt electrode does is equilibrate ultra fast, the C will have a much weaker exchange current , so its potential will initially also depend on any other contaminating couples, but once those reactions are exhausted the same potential as the Pt will develop.  I actually hope I'm wrong BTW. 
Next post will have the result of the disconnection and rest phase for this oxygen karpen.

profitis

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Re: KARPEN PILE
« Reply #437 on: August 11, 2014, 05:30:07 PM »
Ok before you do any hydrogen experiments or further oxygen experiments there is one setup I will insist that you do to prove your loyalty to science and to the overunity crowd pomodoro.it requires platinum(black) and platinum etched under air in Either acid or base.are you willing to do this dastardly simple experiment( you have all ingredients at hand)

profitis

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Re: KARPEN PILE
« Reply #438 on: August 11, 2014, 07:35:58 PM »
When you show on camera the above experiment(Pt black vs Pt) result it will render all of what you just said above null and void.you cannot possibly tell us that platinum vs carbon or platinum vs gold will die out if platinum vs platinum works like a bomb

pomodoro

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Re: KARPEN PILE
« Reply #439 on: August 12, 2014, 02:54:14 AM »
Ok before you do any hydrogen experiments or further oxygen experiments there is one setup I will insist that you do to prove your loyalty to science and to the overunity crowd pomodoro.it requires platinum(black) and platinum etched under air in Either acid or base.are you willing to do this dastardly simple experiment( you have all ingredients at hand)

What are the exact details of this mother of all tests?  Isn't it supposed to be shiny vs black?

pomodoro

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Re: KARPEN PILE
« Reply #440 on: August 12, 2014, 05:31:54 AM »
BTW Im not going to do any tests if they require electrolysis,  these will of course show hydrogen overpotentials!

I've just unshorted the cell, after 18 hours  and will report hourly emf of cell.  I'll keep modifying this post rather than creating new one, so keep coming back here for the updates.

negative value  means C is more negative than the Pd/Pt

Time   EMF
 0 -    0mV
1hr    -1mV
2hrs   -8mV
3hrs   -12mV

Voltage does change very slowly. Decided to end experiment here, now passing UHP hydrogen through exacltly same setup.  Cell is shorted out
« Last Edit: August 12, 2014, 09:42:53 AM by pomodoro »

pomodoro

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Re: KARPEN PILE
« Reply #441 on: August 12, 2014, 07:31:10 AM »
Some positive news., I've been going through text books and found a chapter that indicates that a Pt /C cell CAN act as a power source albeit at a very low current.  Have a look at the attachment, Pic A11, is the cell as a power source, at zero volts (shorted) there is a miniscule current flowing.    This cell is deaerated, however so the rest voltage is somewhere between the two water redox couples, any oxygen  such as in  the cell I'm testing, would shift both to the same potential of the anode.  Hydrogen would have do the same, but there will be a potential difference.    Ummm, looks like hydrogen will be pumped in soon.


MarkE

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Re: KARPEN PILE
« Reply #442 on: August 12, 2014, 09:24:24 AM »
That is a good find.

profitis

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Re: KARPEN PILE
« Reply #443 on: August 12, 2014, 09:38:58 AM »
This cell setup pomodoro.this cell I have done hundreds of times.it has a most stubbornly persistent oxygen potential difference and 50-100microamp/cm2.use NaOH or ammonium sulfate solution.both electrodes are same metal so it proves beyond all doubt a very definite participation of oxygen gas spillover.

pomodoro

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Re: KARPEN PILE
« Reply #444 on: August 12, 2014, 09:48:11 AM »
Thats  easy to do. I need to prepare platinizing solution,  so I can't do it straight away, but soon..

Right now UHP hydrogen is being used in exactly the same cell I tested with Air,  nothing was moved. Keep an eye on that post as I update voltages in about 16 or so hours.

profitis

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Re: KARPEN PILE
« Reply #445 on: August 12, 2014, 09:48:39 AM »
The above Pt(b)/Pt/O2  cell setup shoulve been done ages ago,my bad (-:

profitis

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Re: KARPEN PILE
« Reply #446 on: August 12, 2014, 09:54:13 AM »
Don't you have any platinized platinum lying around pomodoro.this is THE most important experiment for O2 cells by far and it is one that I KNOW works everytime with labgrade foils.

profitis

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Re: KARPEN PILE
« Reply #447 on: August 12, 2014, 10:01:13 AM »
Which electrode was the cathode in your Pd/glassy C/air test result above pomodoro

pomodoro

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Re: KARPEN PILE
« Reply #448 on: August 12, 2014, 10:26:12 AM »
Which electrode was the cathode in your Pd/glassy C/air test result above pomodoro

Cathode was the Pd/Pt,  slightly more +ve than the C.

No platinized Pt, it dissapeared when I heated the Pt in a bunsen!  Been using Pd  black in all my experiments.

I guess I should be stopping the stirring in these experiments when I take voltage readings, otherwise the different gas concs are getting averaged out?

profitis

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Re: KARPEN PILE
« Reply #449 on: August 12, 2014, 10:30:26 AM »
Good.now we will see if that potential switches polarity under H2..(!)