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A Mechanistic Study of CO Oxidation on New Catalysts CeFe 0.5 Sb 1.5 O 6 and PrFe 0.5 Sb 1.5 O 6 Using the X-ray Photoelectron Spectroscopy Method
Russian Journal of Inorganic Chemistry ( IF 1.8 ) Pub Date : 2020-04-28 , DOI: 10.1134/s0036023620040117
E. Yu. Liberman , O. G. Ellert , A. V. Naumkin , S. V. Golodukhina , A. V. Egorysheva

Abstract

X-ray photoelectron spectroscopy has been applied to examine the surface electronic structure of layered oxides CeFe0.5Sb1.5O6 and PrFe0.5Sb1.5O6 with PbSb2O6 structure (sp. g. P‑31m). The analysis of the XP-spectra for both compounds revealed only Ce3+ and Pr3+oxidation state before and after catalytic tests. The observed variation of the Sb5+/Sb3+ and Fe3+/Fe2+ ratios after catalysis can point to that CO oxidation on these catalysts proceeds by virtue of redox transformations Sb3+ ↔ Sb5+ and Fe3+ ↔ Fe2+ with direct involvement of lattice oxygen and anionic vacancies.


中文翻译:

X射线光电子能谱法研究新型催化剂CeFe 0.5 Sb 1.5 O 6和PrFe 0.5 Sb 1.5 O 6的CO氧化机理。

摘要

X射线光电子能谱法已应用于检查层状氧化物的cefE的表面电子结构0.5的Sb 1.5 ø 6和PrFe 0.5的Sb 1.5 ø 6与PBSB 2 ö 6结构(属克P- 31)。两种化合物的XP光谱分析表明,在催化测试前后,仅Ce 3+和Pr 3+氧化态。观察到的Sb 5+ / Sb 3+和Fe 3+ / Fe 2+的变化催化后的比例可以指出,这些催化剂上的CO氧化是通过氧化还原转化Sb 3+ ↔Sb 5+和Fe 3+ ↔Fe 2+进行的,直接涉及晶格氧和阴离子空位。
更新日期:2020-04-28
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