So I have a little project I've been wanting to get up for a while, but I'm not very good at chemistry. I've been looking for a chemical that will readily pick up oxygen that's pumped through it, and release it when heated (preferably below 100°C)

 

The closest things I've been able to find are perclorates and metalic oxides... but I don't trust some of the metals due to metalic gas release which can be toxic :$

Anyone have any ideas of what could help me, or is chemistry not my friend for this?

The classic one is Brin's process

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

but the temperatures are rather higher than you are wanting.

 

There are also the special sorbents used in this sort of thing

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