Reaction-driven Ion Exchange of Copper into Zeolite SSZ-13

Research output: Contribution to journalArticle


title = "Reaction-driven Ion Exchange of Copper into Zeolite SSZ-13",
abstract = "We have used several techniques to characterize Cu-SSZ-13 before and after exposure to reaction conditions relevant for NO reduction by NH3-SCR to address the increase in NH3-SCR activity observed as a function of time on stream. Specifically, we focus on characterizing copper species in samples prepared with solid state ion exchange (SSIE) having varying Cu loadings from 0.7 to 5.2 wt {\%}. X-ray diffraction shows that CuO species that likely remain from the SSIE synthesis on the outside of the zeolite crystallites are significantly reduced by exposure to reaction conditions. High-resolution X-ray diffraction (HR-XRD) further reveals a corresponding increase of Cu2O species. X-ray photoelectron, Auger electron, and ultraviolet -visible spectroscopy show an increase in both Cu(II) and Cu(I) species inside the zeolite pores, with a preserved long-range order of the zeolite structure as revealed by HR-XRD.",
keywords = "NH3-SCR, Cu-SSZ-13, diesel exhaust aftertreatment, solid-state, ion-exchange, NOx reduction",
author = "Clemens, {A. K. S.} and A. Shishkin and Carlsson, {P. -A.} and M. Skoglundh and Francisco Martinez and Zdenek Matej and Olivier Balmes and H. Harelind",
year = "2015",
doi = "10.1021/acscatal.5b01200",
language = "English",
volume = "5",
pages = "6209--6218",
journal = "ACS Catalysis",
issn = "2155-5435",
publisher = "The American Chemical Society (ACS)",
number = "10",