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Re: Discussion: How do we build a Water Station
Just found this:
According to the MSR website the MIOX unit uses platinum electrodes for both the anode and cathode. These shouldn't release any ions under these conditions whereas the carbon/graphite *might* drop something off the anode. I'm not worried about toxicity but I am concerned about the carbon anode creating different oxidative products...
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But on the Miox forum:
In response to your other question, the electrodes are titanium with proprietary catalytic coatings.
Thanks! Katie
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FWIW, titanium is readily available, just cut 2 pieces off your titanium spork or tent stakes, stick them in a capful of salt water, electrolyze it, and pour it into your water bottle. Simple.
The aforementioned notwithstanding, I'd prefer platinum or 24k gold. It is readily available as wire on eBay. AAMOF, I have some gold wire left over from an earlier experiment.
And some Type R thermocouple wire made up of a positive wire of 87% platinum and 13% Rhodium, and a negative wire of 100% platinum. Good to go.
And here's the patent:
Looks like the anode is ruthenium oxide coated titanium, and the cathode is titanium.
"The preferred anode materials comprise a titanium substrate with an oxide coating of Group VIII metals such as platinum, iridium, rhodium, or ruthenium, although other typical anode materials may be utilized in accordance with the present invention. In a preferred embodiment of the present invention, at least one anode comprises ruthenium, for example, ruthenium oxide. These particular Group VIII metals, in addition to being highly reactive catalytic compounds that produce products with good germicidal properties, resist corrosion to a high degree and do not dissolve easily. Coatings can be applied in a number of fashions including painting or spraying followed by oven baking. Coatings can also be applied by deposition and other methods known to those versed in the art and commonly applied in, for example, semiconductor and other industries..."
Just found this:
According to the MSR website the MIOX unit uses platinum electrodes for both the anode and cathode. These shouldn't release any ions under these conditions whereas the carbon/graphite *might* drop something off the anode. I'm not worried about toxicity but I am concerned about the carbon anode creating different oxidative products...
***************
But on the Miox forum:
In response to your other question, the electrodes are titanium with proprietary catalytic coatings.
Thanks! Katie
*************
FWIW, titanium is readily available, just cut 2 pieces off your titanium spork or tent stakes, stick them in a capful of salt water, electrolyze it, and pour it into your water bottle. Simple.
The aforementioned notwithstanding, I'd prefer platinum or 24k gold. It is readily available as wire on eBay. AAMOF, I have some gold wire left over from an earlier experiment.
And some Type R thermocouple wire made up of a positive wire of 87% platinum and 13% Rhodium, and a negative wire of 100% platinum. Good to go.
And here's the patent:
Looks like the anode is ruthenium oxide coated titanium, and the cathode is titanium.
"The preferred anode materials comprise a titanium substrate with an oxide coating of Group VIII metals such as platinum, iridium, rhodium, or ruthenium, although other typical anode materials may be utilized in accordance with the present invention. In a preferred embodiment of the present invention, at least one anode comprises ruthenium, for example, ruthenium oxide. These particular Group VIII metals, in addition to being highly reactive catalytic compounds that produce products with good germicidal properties, resist corrosion to a high degree and do not dissolve easily. Coatings can be applied in a number of fashions including painting or spraying followed by oven baking. Coatings can also be applied by deposition and other methods known to those versed in the art and commonly applied in, for example, semiconductor and other industries..."
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