PST‐1: A Synthetic Small‐Pore Zeolite that Selectively Adsorbs H₂

No gas too small: A synthetic potassium gallosilicate natrolite with Si/Ga=1.28 (denoted PST-1; see picture, Ga/Si gray, O red, K pink) was found to selectively adsorb small gases, especially H2, and hence to discriminate them from slightly larger molecules such as Ar or CO2. The remarkable ease of its dehydration and great (hydro)thermal stability make PST-1 a potential candidate for fast, selective H2 or He separation processes.