Re: Rate of gas production at the electrodes

I am using a Potentiostat..

WayneL


"Peter Lowrie" <peterlowrie@xxxxxxxxxxxxxxx> wrote in message
news:1490602.mUKJ0bssau@xxxxxxxxxxxxxxxxxx
Have you got a clamp meter that can measure both AC and DC? I have one of
each.


WayneL wrote:
I forgot to mention that I have measure the current and it take the form
of
an expo curve and after some time it starts to flattening out but
maintains
a continuous growth, although very gradual.

Cheers

WayneL

<novost@xxxxxxxxx> wrote in message
news:1146813252.614043.178380@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
WAYNEL wrote:
Is there a paper/example on the rate of gas production at the
electrodes of say a simple cell using water?
<snip voltage stuff>
If the rate of gas production is proportional to the current then V=IR
is correct.

That's as maybe - but what evidence do you have
that R is independent of current and voltage?

It's the electron transfer that's doing the job.

If you are interested in the gas production, why don't you
measure the current directly instead of measuring the
voltage and then scratching your head and looking puzzled?

[For accurate measurements, you should also consider
the solubility of the gases in water at cell temperature.]

Then you should find your results are depressingly linear.
If you can do better than linear I'm sure you can find a
patent clerk who will be eager to take your money.

If you are still interested in the cell voltage after the current
experiments, measure V versus I and try to work out what
is happening in the vicinity of the electrodes.

However, if my results are correct then there must be
another power factor needed.
Or should I be looking at energy used (joules)?

No, you should be reading a large book on electrolysis.
Come back when you have finished it ;-)

LenW


--
Regards,
Peter.
http://www.pelicom.net.nz


.

Relevant Pages

  • Re: keyboards
    ... Putting 1 voltage across some electrodes in water is totally different from ... Water as no method to transport current. ... resistance started to drop, ...
    (sci.electronics.basics)
  • Re: Water electrolysis ?
    ... The electrolysis cell is a cell. ... oxygen electrodes from the dissolved gases adsorbed onto the electrodes. ... You must apply sufficient voltage to overcome that cell voltage. ... current will flow in the reverse direction. ...
    (sci.chem)
  • Re: Rechargeable AA Batteries
    ... Every cell has two electrodes, and the output of the cell is the sum of the ... To design a cell with a particular voltage, one has to be lucky enough to ... In cells that rely on metal ions in solution, ...
    (rec.audio.pro)
  • Re: Best metals to make homemade battery?
    ... > So if I use aluminum and copper, we have a potential voltage for one cell of: ... > 60-80% of potential voltage. ... > for one cell. ... also consider surface area of the electrodes to ...
    (sci.electronics.basics)
  • Re: keyboards
    ... but liquids are not conductors at low voltages in general? ... Putting 1 voltage across some electrodes in water is totally different from ... Water as no method to transport current. ...
    (sci.electronics.basics)