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A comment on Gallium helps convert CO2 into Carbon and Oxygen.

Re:Gallium helps convert CO2 into Carbon and Oxygen by javier_cardona on Saturday October 23, 2021 @07:36AM (#28967481)
A preprint of the paper mentioned in the post is available here: https://www.researchgate.net/publication/347609399_Mechanica...
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Re:Gallium helps convert CO2 into Carbon and Oxygen by GistNoesis on Saturday October 23, 2021 @08:50AM (#28967913)
The following link has the additional supplementary images missing from your link https://www.researchsquare.com/article/rs-112257/v1

I quickly skimmed it but the protocol on page 13 seems simple, the chemicals involved are relatively low risk (verify the MSDS).

Mix some gallium metal with a powder of a Silver salt in a mortar and pestle, put it in a solvent, stir it with a magnetic stirrer, while bubbling CO2, in a N2 atmosphere, and carbon snowflakes should float to the top in a few hours.

Maybe some chemist can help make it into a safe for all kid science-fair project.

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