e, h) Synchrotron ex situ XRD patterns of at different potentials during discharge and charge processes of FeSn5, Fe0.5Co0.5Sn5and CoSn5nanospheres electrode and (c, f, i) the set of FTs of the Sn K-
利用XAFS光谱深入解析FeSn-C2N双金属原子位点的配位构型与价态。Fe K-edge XANES谱(Figure. 3a)显示,FeSn-C2N中Fe的氧化态介于FeO与Fe2O3之间,指示+2<δ<+3价态,且较Fe-C2N中更低,归因于Sn掺入引发的极化电荷效应。Fe K-...
采用XAFS光谱技术深入剖析了FeSn-C2N双金属催化剂的原子构型与价态特性。Fe K-edge XANES分析表明,Sn的引入导致Fe的氧化态降低,这归因于极化电荷效应的作用。Fe K-edge FT-EXAFS图谱直接证实了Fe-Sn键(2.22 Å)的存在,验证了双金属配位结构的构建。此外,Sn K-edge XANES数据显示,Sn的价态亦有所降低,反映了...
图五、在Sn2(dobpdc)的锂化-脱锂循环期间,准原位XAFS光谱进行结构表征 (a)在50 mA g-1下,第二次放电-充电过程中的负载曲线,带有准原位XAFS测试的标记状态; (b)用于准原位XAFS测试的纽扣电池横截面示意图; (c-d)造放电过程中,SnK-edge XANES; (e-f)SnK-edge k3加权FT-EXAFS光谱拟合在R空间中的放电-...
In-situ XAFS at Pt Lm-edge and Sn K-edge under the PEFC operating conditions showed the absence of electron transfer from Sn to Pt and also no changes in the Sn state, indicating its stability. The in situ XAFS for the Pt-Sn(oxidized shell)/C also revealed that Pt nanoparticles made ...
X-ray absorption fine structure (XAFS) experiments were carried out on the 7D beamline of the Pohang Accelerator Laboratory (PLS-II, 3.0GeV). Synchrotron radiation was mon- ochromatized using a Si (111) double crystal monochromator. At room temperature, the spectra for the Fe K-edge (oEr...
We report x-ray absorption fine structure (XAFS) measurements at the Nb K -edge of a Nb 3 Sn single crystal, for temperatures across the martensitic struct... R Falconi - 《Journal of Superconductivity & Novel Magnetism》 被引量: 0发表: 2011年 X-ray-absorption fine-structure study of the...
Furthermore,the more detailed phase structure was explored by the X-ray absorption fine structure(XAFS)selectively measured at Sn L3-edge.In the normalized XANES(Fig.2c),the absorption edge energy of Sn L3-edge in SnO2/Sn3O4is located between pure SnO2and pure Sn3O4,inclined to Sn3O4,ind...
原位技术是研究动力学过程强有力的手段,我们基于上海光源(BL14W1线站)设计开发了在线电化学测试装置,通过operando XAFS手段对MXene电极材料中元素在充放电过程中的价态变化进行了研究(Figure 4(a))。 V K-edge的原位测试结果发现(Fi...
(b, e, h) Synchrotron ex situ XRD patterns of at different potentials during discharge and charge processes of FeSn5, Fe0.5Co0.5Sn5 and CoSn5 nanospheres electrode and (c, f, i) the set of FTs of the Sn K-edge XAFS spectra taken during the first cycle (Reprinted with permission from...