نتایج جستجو برای: zn fealumina catalyst
تعداد نتایج: 82294 فیلتر نتایج به سال:
Local structures around metal atoms in Hi and Zn substituted 132-hydroxy-bacteriochlorophyll a (Ni-HOB, and Zn-HOB) with and without insertion into the accessory bacteriochlorophyll a (BChla) sites in Rhodobacter sphaeroides photosynthetic reaction centers (RC) are studied using X-ray absorption spectroscopy. The penta-coordination of Ni-HOB and Zn-HOB in the RC is similar to that of BChl a in ...
M-MgAlO mixed oxide catalysts were prepared by controlled thermal decomposition of layered double hydroxides (LDH) precursors and tested in the hydrodeoxygenation benzyl alcohol. LDH with Mg/Al = 3 10 at. % M respect to cations (M Mn, Fe, Co, Ni, Cu Zn) obtained coprecipitation. A second series copper-containing copper content from 5 20 was also prepared. The solids characterized X-ray diffract...
Much effort has been devoted to the development of efficient heterogeneous catalysts for conversion carbon dioxide (CO2) into high-value chemicals. Generally, cycloaddition CO2 epoxides is considered a green and atom-economic reaction production cyclic carbonates. Based on this, three kinds silicon-based modified using zinc(Ⅱ) 2-bromoacetic (Si-ZnBA-n, n = 1, 2, 3) were facilely synthesized emp...
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