Erratum: “A high precision gas flow cell for performing in situ neutron studies of local atomic structure in catalytic materials” [Rev. Sci. Instrum. 88, 034101 (2017)]

Capturing the Details of N2 Adsorption in Zeolite X Using Stroboscopic Isotope Contrasted Neutron Total Scattering

“…The absorption of N 2 molecules modifies the structural framework of the zeolite. As previously reported, 30 neutron diffraction data indicate that the zeolite structure responds to the presence of nitrogen by shrinking the unit cell volume upon gas loading. Since these contractions are reversible upon desorption, they are often referred to as "lattice breathing".…”

“…■ EXPERIMENTAL AND THEORETICAL METHODS Sample Preparation. The material preparation and characterization has been described previously 30 and is summarized here. The zeolite used for gas adsorption was produced through ion exchange of sodium zeolite X (NaX) powder with aqueous calcium chloride.…”

“…Stroboscopic neutron total scattering data were collected using the high-precision gas flow cell sample environment designed for SSITKA measurements. 30 In situ SSITKA measurements with simultaneous neutron total scattering were performed by flowing alternately 15 N 2 and 14 N 2 , where the 14 N 2 was mixed with 3% Ar to function as an inert trace, with helium as an inert carrier gas through the sample. The switching time between the two gases was set to 6 min with an overall number of 12 switching cycles between the two isotopes, resulting in a total measurement time of 150 min.…”