Is graphite a positive or negative electrode?
Is graphite a positive or negative electrode?
Graphite can function as both a positive and a negative electrode depending on the context.
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In certain electrochemical systems, such as lithium-ion batteries, graphite is commonly used as a negative electrode (anode).
In other applications, such as certain types of fuel cells, graphite may serve as a positive electrode (cathode).
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The role of graphite in an electrochemical system is determined by the specific design and requirements of that system.
What is going on with a graphite anode vs a silver ...
Again one is an inert electrode and the other one is an ignoble electrode. So different cases.
At an inert anode only the anions can be oxidised. At an ignoble electrode the Anions react with there material the anion will not oxidised, but the material of the electrode.
At cathode side the cathions will be reduced and coated on it. Doesn't matter inert or ignoble.
Thanks.. So from that it sounds like you mean that in regard to the anode, it's one or the other.
Either you get anions going to the anode (like with graphite anode in lead bromide)
Or you get the anode itself shrinking down, (like with silver anode in silver nitrate)
So I don't understand what you meant though when you wrote earlier "Also in the silver case ions involved. The nitrate ions.
Nitrate travels to plus and catch the silver and release one electron into the electrode."
In the silver nitrate case, are you saying that the anions give an electron to the silver electrode?
If the silver electrode was inert, which it isn't, then it'd not get oxidised or reduced . And if the silver electrode were not inert then it'd get reduced, but we know the silver anode doesn't get reduced. 'cos it's an anode and an anode doesn't get reduced and no reduction takes place at an anode.
In the case of the silver nitrate, I know for sure the silver anode diminishes. But there you seem to be saying that anions lose electrons to it and the anions get oxidised. So it sounded to me like you were saying both oxidation processes happen. Though now I know you're not saying that.
So i'm a bit puzzled by that statement.. Were you saying that Nitrate anions are attracted to the silver electrode? And were you saying they get oxidised?
And wouldn't you agree that the silver anode gets oxidised when it gives electrons to the battery's + terminal.
But then that sounds to me like oxidation going on twice so I don't think you're saying that happens. I think we agree oxidation of the silver anode the silver anode reduces, and anions don't get oxidised there.
So i'm a bit puzzled by what you're saying there in the earlier thing you wrote "Also in the silver case ions involved. The nitrate ions. Nitrate travels to plus and catch the silver and release one electron into the electrode."
Thanks.. So from that it sounds like you mean that in regard to the anode, it's one or the other.Either you get anions going to the anode (like with graphite anode in lead bromide)Or you get the anode itself shrinking down, (like with silver anode in silver nitrate)So I don't understand what you meant though when you wrote earlier "Also in the silver case ions involved. The nitrate ions.Nitrate travels to plus and catch the silver and release one electron into the electrode."In the silver nitrate case, are you saying that the anions give an electron to the silver electrode?If the silver electrode was inert, which it isn't, then it'd not get oxidised or reduced . And if the silver electrode were not inert then it'd get reduced, but we know the silver anode doesn't get reduced. 'cos it's an anode and an anode doesn't get reduced and no reduction takes place at an anode.In the case of the silver nitrate, I know for sure the silver anode diminishes. But there you seem to be saying that anions lose electrons to it and the anions get oxidised. So it sounded to me like you were saying both oxidation processes happen. Though now I know you're not saying that.So i'm a bit puzzled by that statement.. Were you saying that Nitrate anions are attracted to the silver electrode? And were you saying they get oxidised?And wouldn't you agree that the silver anode gets oxidised when it gives electrons to the battery's + terminal.But then that sounds to me like oxidation going on twice so I don't think you're saying that happens. I think we agree oxidation of the silver anode the silver anode reduces, and anions don't get oxidised there.So i'm a bit puzzled by what you're saying there in the earlier thing you wrote "Also in the silver case ions involved. The nitrate ions. Nitrate travels to plus and catch the silver and release one electron into the electrode."
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