On the presence of Fe(IV) in Fe-ZSM-5 and FeSrO3-x --unequivocal detection of the 3d4 spin system by resonant inelastic X-ray scattering.

On the presence of Fe(IV) in Fe-ZSM-5 and FeSrO3-x --unequivocal detection of the 3d4 spin system by resonant inelastic X-ray scattering.
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关于 Fe-ZSM-5 和 FeSrO3-x 中 Fe(IV) 的存在——通过共振非弹性 X 射线散射明确检测 3d4 自旋系统。

DOI:
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发表时间:
2006
影响因子:
3.3
通讯作者:
P. Glatzel
P. Glatzel
中科院分区:
化学3区
文献类型:
--
作者:
G. Pirngruber;J. Grunwaldt;J. V. van Bokhoven;A. Kalytta;A. Reller;O. Safonova;P. Glatzel

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3d(4)自旋组态对Fe化合物价电子结构的贡献可以通过自旋选择性Fe K-前边缘吸收光谱,使用共振非弹性X射线散射(RIXS)来探测。Fe(IV)的3d(4)构型甚至可以在与Fe(III)的高自旋3d(5)构型的混合物中明确地检测到。这在具有形式氧化态Fe(IV)的钙钛矿FeSrO(3-x)上得到证明。当该技术应用于Fe-ZSM-5催化剂与N(2)O反应期间,没有检测到3d(4)构型。因此,可以排除Fe-ZSM-5与N(2)O反应时形成Fe(IV)的可能性。
The contribution of a 3d(4) spin configuration to the valence electronic structure of Fe compounds can be probed via spin-selective Fe K-pre-edge absorption spectra, using resonant inelastic X-ray scattering (RIXS). The 3d(4) configuration of Fe(IV) can be unequivocally detected even in a mixture with the high-spin 3d(5) configuration of Fe(III). This is demonstrated on the perovskite FeSrO(3-x) with formal oxidation state Fe(IV). When the technique was applied to an Fe-ZSM-5 catalyst during reaction with N(2)O, no 3d(4) configuration was detected. The formation of Fe(IV) upon reaction of Fe-ZSM-5 with N(2)O can, therefore, be ruled out.