As an example on how to understand the catalytic sites at the molecular level by starting with the model catalysts,this report briefly describes three Re-Sn mixed oxide crystallites with well-defined structures and th...
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As an example on how to understand the catalytic sites at the molecular level by starting with the model catalysts,this report briefly describes three Re-Sn mixed oxide crystallites with well-defined structures and their catalytic performances in the selective ammoxidation of light *** specific crystalline（100） structures of SbRe2O6 and their interaction with the NH3 reactant play a crucial role in the activation of C-H bonds in alkane *** interaction between the（100） planes and NH3 leads to the formation of adsorbed NHx species and oxygen vacancies,and it specially increases the activity of the lattice oxygen atoms,which constitute the active sites for the C-H bond activation in the ammoxidation *** provides useful information for the design of novel catalysts of the selective oxidation reactions.
可穿戴设备的快速发展刺激了对柔性高面容量储能设备的迫切需求。本工作采用一种简单的无粘结剂阴极电沉积方法将纳米片状RuO_x·nH_2O沉积固定在三维石墨烯骨架上,以提高RuO_x·nH_2O的利用效率,实现了更优良的电极导电性,并缩短了质子和电子的扩散传输路径。在2 m V?s-1时,它的面容量高达3.78 F?cm^(-2),主要归因于材料的纳米层状结构有利于电解质进入活性物质RuO_x·nH_2O的内部。另外,以这种电极材料制备得到的全固态柔性超级电容器,在10mA?cm^(-2)的电流密度下,能量密度达到0.1m Wh?cm^(-2),功率密度达到2.4mW?cm^(-2),超过大部分文献报道。
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