XANES study of the dynamic states of V-based oxide catalysts under partial oxidation reaction conditions

被引：8

作者：

Guerrero-Perez, M. O. ^{[1
]}

Lopez-Medina, R. ^{[2
,3
]}

Rojas-Garcia, E. ^{[2
,4
]}

Banares, M. A. ^{[2
]}

机构：

[1] Univ Malaga, Dept Ingn Quim, E-29071 Malaga, Spain

[2] CSIC, ICP, SpeICat Catalyt Spect Lab, Marie Curie 2, E-28049 Madrid, Spain

[3] Univ Autonoma Metropolitana Azcapotzalco, Area Proc Ind Quim, Dept Energia, Ave San Pablo 180, Col Reynosa 02200, Tamaulipas, Mexico

[4] Univ Autonoma Metropolitana Iztapalapa, Dept Ingn Proc & Hidraul, Ave San Rafael Atlixco 186, Col Vicentina 09340, Iztapalapa, Mexico

来源：

CATALYSIS TODAY | 2019年 / 336卷

关键词：

VSbO4; M1; Supported nanoscaled bulk catalyst; Multioxide catalysts; XANES; Operando; X-RAY-ABSORPTION; OPERANDO RAMAN-GC; IN-SITU XANES; VANADIUM-OXIDE; PROPANE AMMOXIDATION; MOVTE(SB)NBO CATALYSTS; SELECTIVE OXIDATION; GAMMA-ALUMINA; SB+V COVERAGE; ACTIVE PHASE;

D O I：

10.1016/j.cattod.2017.12.016

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A XANES study under reaction conditions has been performed with two different V-based catalytic systems, Mo-V-Nb-Te-O and V-Sb-O. For this study, an alumina-supported nanoscaled bulk catalyst has been used. In all cases XANES determined the average vanadium oxidation state during reaction. XANES also demonstrated that the nanosized phases are more dynamic, and able to participate in the redox catalytic cycle without significant changes either in their structure or in the overall vanadium oxidation state. Such a stability is also apparent under oxidizing conditions.

引用

页码：210 / 215

页数：6

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