The present study found a higher prevalence of depression in the Chinese older population compared with those reported two decades ago. Family support and health status were the most significant protective factors for depression in Chinese older adults. Traditional Chinese culture, which values family significantly and contributed to the previously reported lower prevalence rate, changed dramatically, which may explain the current higher prevalence. In addition to the deterioration of family support, the worsening of health status is another significant factor.
Understanding
the structure–reactivity relationship at the
atomic scale is of great theoretical importance for rational design
of highly active catalysts, which has long been a central concern
in catalysis communities and interface science. Herein, we developed
a high-efficiency catalyst for catalytic oxidation of C6H12 by poststructural decoration on well-defined single-crystal
facets of hematite. Especially for Cl-decorated {012} facets, the
conversion and KA oil selectivity are improved about 3.4 times and
2 times, respectively. A better catalytic performance of the newly
formed active site is derived from the charge difference between Cl
and the neighboring outmost O atoms, which is affected by the geometric
and electronic structures of the original catalyst surface. Based
on the experimental results and the theoretical analysis, we concluded
that the contribution of various O terminations to Cl-decoration follows
the order O(I) > O(III) > O(II). Cl-decorated {001} facets show
the
highest intrinsic activity, whereas Cl-decorated {012} facets show
the best catalytic performance because of their more active sites
for Cl-decoration.
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