From Newsgroup: sci.misc

Scientists watched a cheap, rust-colored material "breathe" oxygen
like a sponge, and it produced more than twice as much clean hydrogen
as the previous best catalyst
...
...
If these efficiency gains hold up in large factories, a cheap,
rust-colored sponge could quietly become the backbone of the clean
energy revolution.

https://energiesmedia.com/iron-catalyst-doubles-hydrogen-output-energy/

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