NO<sub><i>x</i></sub> Adsorption Site Engineering in Ru/Ba,Na–Y Zeolite

Adsorption of gas molecules is a typical application for zeolites. Interaction of adsorbed molecules with cations in zeolite frameworks is responsible for selectivity and adsorption strength. Through detailed analysis of the cation distribution in zeolite Y containing Na<sup>+</sup>, Ba<sup>2+</sup>, and Ru<sup>3+</sup> cations by NMR and X-ray diffraction combined with adsorption studies it was possible to develop a reversible, highly performant NO<sub><i>x</i></sub> adsorbent. The results demonstrate intimate understanding of guest–host interactions can lead to rational tailoring of zeolite properties.