Fully copper-exchanged high-silica LTA zeolites as unrivaled hydrothermally stable NH3-SCR catalysts

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.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.PostprintPostprintPeer reviewe

Parental Cohabitation Experiences and Adolescent Behavioral Outcomes

Cohabitation, Family structure,

Divorce and the Multidimensionality of Men and Women’s Mental Health: The Role of Social-Relational and Socio-Economic Conditions

Research consistently reveals that the divorced generally face more mental health problems than the married. Less attention however has been paid to positive mental health indicators. Insight in these however may help policy makers and care providers to see both the broader picture and stimulate active coping. Using data from the European Social Survey (2006–2007), differences in both feelings of depression, and in feelings of self-esteem, autonomy, and competence between the married (N = 14,072) and divorced (N = 4,304) are estimated for women and men separately. Drawing on stress and coping theories, we map how specific social-relational and socio-economic conditions relate. Analyses reveal that divorce is related not only to more feelings of depression, but also to lower levels of self-esteem and competence. Difference scores in mental health based on marital status are also found to differ significantly between men and women for competence, with the difference being more pronounced in men. Additionally, social-relational and socio-economic conditions explain much of the gap in depression scores – and to a lesser extent, in self-esteem and competence scores – between the married and divorced. Finally, some interesting gender differences were found in how social-relational and socio-economic conditions relate to mental health when divorced, with women especially seeming to benefit from advantageous socio-economic conditions