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Abstract: To overcome the limitations of metal–organic frameworks (MOFs) for catalysis (e.g., low catalytic activities resulting from blockage of the active metal centers by organic linkers) is of great importance. Herein, we demonstrate the formation of UiO‐66 nanoparticles with ultrasmall size and linker defects with the aid of SnS2 nanosheets. The UiO‐66 nanoparticles supported by SnS2 nanosheets were found to exhibit excellent catalytic activity for the cycloaddition reaction of CO2 with propylene oxide under solvent‐free and co‐catalyst‐free conditions. Outstandingly, the catalytic activity was 11 times higher than that of the pure UiO‐66 catalyst under optimum conditions. We thus provide a promising route to modify MOF particles thus to promote their catalytic performance. [ABSTRACT FROM AUTHOR]

Nitrogen oxides (NO x) contribute much to acid rain, photochemical smog, and the depletion of tropospheric ozone. A novel, small-pore Cu-exchanged chabazite (Cu-CHA) zeolite, Cu-SAPO-44, was first studied for the selective catalytic reduction of NO x with ammonia (NH3-SCR), and exhibits excellent activity and N2 selectivity over the wide temperature window from 200-550 °C. The Cu content in Cu-SAPO-44 plays a significant role in the NH3-SCR reactions. Two kinds of isolated Cu2+ species inside the large cages and in the six-membered rings of the CHA structure were verified as the active sites, which are responsible for the low-temperature and high-temperature activity, respectively. Cu-SAPO-44 is shown to be a promising candidate as a SCR catalyst for deNO x with great potential in after-treatment systems for either mobile or stationary sources. [ABSTRACT FROM AUTHOR]

The Cover shows a novel Cu‐SAPO‐44 zeolite which would be a promising candidate as a selective catalytic reduction (SCR) catalyst for deNOx with great potential in after‐treatment systems for mobile sources.In their Full Paper, Y. Xin et al. report for the first time, insights into the performance and active sites of this novel Cu ion‐exchanged SAPO‐44 zeolite (Cu‐SAPO‐44) in NH3‐SCR. Experimentally derived results demonstrate that Cu‐SAPO‐44 exhibits excellent activity and N2 selectivity over a wide temperature window even after severe hydrothermal aging and that two kinds of isolated Cu2+ species with high thermostability are the active sites. This findings represent a new opportunity for potential industrial applications of Cu‐SAPO‐44 and provide a choice for NOx control in diesel exhausts. More information can be found in the Full Paper by Y. Xin et al. on page 3740 in Issue 24, 2016 (DOI: 10.1002/cctc.201601159). [ABSTRACT FROM AUTHOR]

Nitrogen oxides (NO x) contribute much to acid rain, photochemical smog, and the depletion of tropospheric ozone. A novel, small-pore Cu-exchanged chabazite (Cu-CHA) zeolite, Cu-SAPO-44, was first studied for the selective catalytic reduction of NO x with ammonia (NH3-SCR), and exhibits excellent activity and N2 selectivity over the wide temperature window from 200-550 °C. The Cu content in Cu-SAPO-44 plays a significant role in the NH3-SCR reactions. Two kinds of isolated Cu2+ species inside the large cages and in the six-membered rings of the CHA structure were verified as the active sites, which are responsible for the low-temperature and high-temperature activity, respectively. Cu-SAPO-44 is shown to be a promising candidate as a SCR catalyst for deNO x with great potential in after-treatment systems for either mobile or stationary sources. [ABSTRACT FROM AUTHOR]