2020同步年報

L aboratory simulations of multicomponent ice mantles of protoplanetary discs performed at 10 K under ultra- high-vacuum conditions involve irradiation with ultraviolet or X-ray photons. The ice mantles for this study were pre- pared on taking into account a more realistic ice config- uration composed of two layers. Observation from space is compatible with these laboratory simulations of X-ray processing of realistic ice. Unique Rh 2 Sb nanorods were synthesized with surface- rough and surface-smooth attributes for the first time. The surface shape of the electrocatalyst is an important fac- tor affecting the efficiency of NRR, which provides a new strategy for creating efficient NRR electrocatalysts. Jeffrey J. Urban recorded X-ray-absorption fine-structure (XAFS) spectra to investigate the local structure of ZIOS that does not significantly vary around the Zn 2+ node in the ZIOS structure. Urban postulated that the framework expands to some extent on gradually inviting water molecules to “assimilate” themselves. A rapid defect- and desolvation-triggered lattice rearrange- ment in a mesoporous metal-organic framework (MOF) material from a less crystalline (AlTz-53) to a porous isomer (AlTz-68) was revealed by powder X-ray diffraction struc- tural analysis. Spin-state, charge-state, crystal-structure and metal-insulator transitions take place collectively in the same material system, PbCoO 3 , which was confirmed with an interesting phase diagram of the dependence on pres- sure and temperature from the high-pressure resistance, XES, XAS and X-ray diffraction (XRD) results. X-ray absorp- tion spectra present a method to bridge the gap of specific clarification of the local structure and oxidation state of metal centers under an operando mode. The first QXAFS scan of a solution of Pd(OAc) 2 and P(p-Tol) 3 in several sol- vents was reported. This methodology will provide numer- ous new opportunities for the optimization of catalysts in more complicated homogeneous catalytic reactions. (by Chen-Lin Liu) Chemical Science