@article{c722e4ba2e9e4659b2b11f4a568274a8,
title = "Fully copper-exchanged high-silica LTA zeolites as unrivaled hydrothermally stable NH3-SCR catalysts",
abstract = "Diesel engine technology is still the most effective solution to meet tighter CO2 regulations in the mobility and transport sector. In implementation of fuel-efficient diesel engines, the poor thermal durability of lean nitrogen oxides (NOx) aftertreatment systems remains as one major technical hurdle. Divalent copper ions when fully exchanged into high-silica LTA zeolites are demonstrated to exhibit excellent activity maintenance for NOx reduction with NH3 under vehicle simulated conditions even after hydrothermal aging at 900 °C, a critical temperature that the current commercial Cu-SSZ-13 catalyst cannot overcome owing to thermal deactivation. Detailed structural characterizations confirm the presence of Cu2+ ions only at the center of single 6-rings that act not only as a catalytically active center, but also as a dealumination suppressor. The overall results render the copper-exchanged LTA zeolite attractive as a viable substitute for Cu-SSZ-13.",
keywords = "Cu-LTA, Heterogeneous catalysis, Hydrothermal stability, Selective catalytic reduction, Zeolites",
author = "Taekyung Ryu and Ahn, {Nak Ho} and Seungwan Seo and Jung Cho and Hyojun Kim and Donghui Jo and Park, {Gi Tae} and Kim, {Pyung Soon} and Kim, {Chang Hwan} and Bruce, {Elliott L.} and Wright, {Paul A.} and In-Sik Nam and Hong, {Suk Bong}",
note = "We acknowledge financial support from the National Creative Research Initiative Program (2012R1A3A2048833) through the National Research Foundation of Korea and from Hyundai Motor Group. We also thank J. Y. Koo (POSTECH) for assistance with ESR measurements, K.-S. Lee and Y. H. Jung (8C and 9B, PAL, respectively) for help in X-ray absorption and diffraction data, S. P. Thompson (I11,DLS) for help in obtaining powder X-ray diffraction data, and PAL and DLS for beam time. PAL is supported by MSIP and POSTECH. We acknowledge financial support from the National Creative Research Initiative Program (2012R1A3A2048833) through the National Research Foundation of Korea and from Hyundai Motor Group. We also thank J. Y. Koo (POSTECH) for assistance with ESR measurements, K.-S. Lee and Y. H. Jung (8C and 9B, PAL, respectively) for help in X-ray absorption and diffraction data, S. P. Thompson (I11,DLS) for help in obtaining powder X-ray diffraction data, and PAL and DLS for beam time. PAL is supported by MSIP and POSTECH.",
year = "2017",
month = mar,
day = "13",
doi = "10.1002/anie.201610547",
language = "English",
volume = "56",
pages = "3256--3260",
journal = "Angewandte Chemie International Edition",
issn = "1521-3773",
publisher = "John Wiley & Sons, Ltd",
number = "12",
}