Reaction mediumγ-Fe 2 O 3 nanocrystallites were synthesized from iron(II) acetylacetonate using the solvothermal reaction and calcined at 500–900°C. Their structure was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The crystallite size was calculated using ...
2a. The first discharge process exhibits three peaks related to the different reaction stages. The minor peak at ,1.64 V (inset of Fig. 2a) corresponds to the initial lithiation of Fe2O3 to form LixFe2O3 (Equation (1) and (2))33. The minor shoulder peak at ,0.9 V (inset of Fig...
为了准确模拟中间产物对Fe剥离动力学的影响,作者考虑了Fe位点上的几种潜在含氧中间产物(Fe-O2、Fe-OH)和相邻碳位点上可能的碳氧化(C-OH、C-O-C),如图2a所示。作者还确定了当Fe远离表面时所有可能的FeN4分子的自由能的演变,计算出的Fe剥离能垒如图2b所示,在铁中心或邻近的C位点吸附中间产物会导致铁剥离的动力...
In this reaction, Fe loses electrons and is oxidized, while NaOH gains electrons and is reduced. The Fe2+ ions combine with OHions from NaOH to form Fe(OH)2, which then reacts further to form Fe2O3. The Na+ ions remain in solution as spectator ions. The Fe2O3 that is formed is...
The reaction of NO(2) with Fe(2)O(3) has relevance for both atmospheric chemistry and catalysis. Most studies have focused on hematite, α-Fe(2)O(3), as it is the thermodynamic stable state of iron oxide; however, other forms of Fe(2)O(3) naturally occur and may have different ch...
为了准确模拟中间产物对Fe剥离动力学的影响,作者考虑了Fe位点上的几种潜在含氧中间产物(Fe-O2、Fe-OH)和相邻碳位点上可能的碳氧化(C-OH、C-O-C),如图2a所示。作者还确定了当Fe远离表面时所有可能的FeN4分子的自由能的演变,计算出的Fe剥离能垒如图2b所示,在铁中心或邻近的C位点吸附中间产物会导致铁剥离的...
3.本研究发现了Fe位点上含氧中间体与N质子化的协同作用,促进了铁原子在不同电位下转化为Fe2O3,为Fe-N-C催化剂的稳定性问题提供了新的理论依据和解决方案。 图文导读 由热力学角度来看,吡啶型FeN4的剥离自由能为0.71 eV,吡咯型FeN4为1.21 eV(图1a),说明从表面剥离Fe原子都是不易发生的,同时自由能随着铁原...
磁场可以通过增强铁磁性催化剂自旋选择性的电子转移来促进析氧反应(Oxygen Evolution Reaction,OER)的反应动力学。通过控制Co离子添加量实现了精确调控反铁磁性α-Fe2O3相向铁磁性γ-Fe2O3相的转变,在阳极处施加恒定外磁场(200 mT),...
Feng Gao1 & Qingyi Lu2 In this study, we report a facile fabrication of ultrathin two-dimensional (2D) nanosheet hybrid composite, α-Fe2O3 nanosheet@Ni(OH)2 nanosheet, by a two-step hydrothermal method to achieve high specific capacitance and good stability performance at high charging...
Layered heterojunction structure with larger interface region for electron migration has attracted much attention in recent years. In this work, layered α-Fe2O3/Bi2WO6 heterojunctions with strong interlayer interaction were successfully synthesized thro