Dear All,

I'm an electronic engineer and am designing a three terminal
potentiostat esp. for cyclic voltammtery.
So as to appear mildy intelligent (!) I have done some googling of the
subject and am confused by the terms anodic scan and cathodic scan and
anodic currents and cathodic currents.
Can anyone educate me, please?

For scans -
Does anodic, for example, refer to the portion of a scan when the
working electrode is +ve w.r.t. the reference (as opposed to -ve)
regardless of the direction of scan or does it indicate that the
direction of scan is towards a more positive potential regardless of
the actual potential?

For currents -
Does anodic, for example, refer to currents being sourced (as opposed
to sunk) by the working electrode regardless of the portion of scan or
does it refer to the current being passed by the working electrode
only in the portion of scan called "anodic" as defined by the first
query above regardless of the current direction?

I am not a chemist and I hope this question is appropriate for this
group.

Does anyone know of a table of different molten salts indicating their
melting and boiling points?

I would like to find something with a BP around 20C and a BP above
250C.

Best regards,
Goan

Hi,

I am working on a separator material for a water based electrolyzer.
The separator needs to prevent O2 and H2 gas from passing through it,
but still allow the ions (from MgSO4, H+ and OH-) to pass through it
(in the liquid). I am mainly looking at using porous ceramics for
this, which is a common material for it.

My question is this:
I believe that although the radius of O2 and H2 gas is roughly less
than 0.2 nm they would need a much larger hole in a filter, in water,
to be able to pass through - due to capillary forces and other physics
of the fluids and gases. Is this correct? If so what are the
explanations for it?

My primary question is:
What is the minimum hole size H2 or O2 gas would need to be able to
pass through a filter, in water, at STP?

I am currently testing usage of porous ceramics that so far seems to
work OK. But to optimize things I am going to select one with the
correct porosity. And I can't explain why they even work, when the
porosity is much greater than the radius of O2 or H2 gas.

----- Original Message -----
From: hina shah
To: electrochemistry@yahoogroups.com
Sent: Monday, July 28, 2008 2:12 PM
Subject: Re: [Electrochem.Net] i need an article

Dear sir / miss
The paper you requested for is being attached with
this mail. Please have a look at it.

Regards
On 7/25/08, ghalkhani wrote:
Dear Mr/Miss

I need this article but it is not accessible for me.

please if it is possible send this for me.

Electrochemical Oxidation of Phenothiazine Derivatives at Glassy
Carbon Electrodes and Their Differential Pulse and Square-wave Voltammetric
Determination in Pharmaceuticals

Authors: Katarzyna Mielech-ukasiewicz a; Helena
Puzanowska-Tarasiewicz a; Aneta Panuszko a

We can make energy out of matter, and matter out of energy. With cold
fusion, we will unlock the power of the atom, and the world will have
infinite energy and be able to create matter out of energy and thus
infinite wealth.

Cold fusion is for real. Just like the light bulb it may take many
attempts to get it right.

Thomas Edison failed more than 1,000 times when trying to create the
light bulb. When asked about it, Edison allegedly said, "I have not
failed 1,000 times. I have successfully discovered 1,000 ways to NOT
make a light bulb." He then succeeded, and now the world has light.

Cold fusion is for real.

http://en.wikipedia.org/wiki/Cold_fusion

From Wired Magazine "What If Cold Fusion Is Real?"

http://www.wired.com/wired/archive/6.11/coldfusion_pr.html

"That's what makes cold fusion so nonreproducible," says Storms. "You
have to load the palladium with very high concentrations [of
deuterium], and many samples simply won't tolerate it."

Hi All,

I built a water electrolysis chamber. I am using MgSO4 in H20 as the
electrolyte.

I built it with 2 plexiglass boses, each with one side open, that bolt
together on the open side, with a small chamber between the 2 boxes,
allowing me to try different materials for the semi-permeable membrane
in the middle section.

The chamber is working nicely. I am getting H2 from the negative
side. It produces about 1 liter of H2 every 30 minutes.

I have a few questions on the whole process:

On the half of the chamber with the negative terminal, the water is
turning a dark bluish color. Is this the Magnesium ions moving to
that side of the chamber?

On the half of the chamber with the positive terminal, the water is
turning a orange color. Is this the SO4 ions moving to that side of
the chamber?

Would the reaction for the electrolyte be:

MgSO4 + H2O --> MgOH + HSO4

Hello

Some of you have succeeded in identifying potentiometric of Fe (III) using
the membrane electrode with tetraferrate?
I've not ...
Analytical Chemistry, Pag. 93, 1975.

Hello

I've been testing the determination of potentiometric Fe (III) using the
carbon electrodes, but I find that responds but to changes in pH !
Some of you found it work?
Electroanalysis, pag. 567, 1998.

Hello,

My question is related to the language used in lithium batteries. In
some of the technical literature I have read I find that although
oxidation occurs at anode (Li

----- Original Message -----
From: bankim_j sanghavi
To: electrochemistry@yahoogroups.com
Sent: Saturday, June 28, 2008 1:49 AM
Subject: Re: [Electrochem.Net] Please if it is possible send this article
for me

Hi,

I have the paper of your interest.

Regards
--- On Fri, 6/27/08, ghalkhani <> wrote:

From: ghalkhani <>
Subject: [Electrochem.Net] Please if it is possible send this
article for me
To: "electro analysis" yahoogroups.com>
Date: Friday, June 27, 2008, 1:55 AM

Dear friend
I need this article but unfortunately i cannot get that.if it
is possible please send me .

With best regard