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.

中文翻译：

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XANES研究部分氧化反应条件下V基氧化物催化剂的动力学状态

在反应条件下的XANES研究已使用两种不同的基于V的催化体系Mo-V-Nb-Te-O和V-Sb-O进行。对于这项研究，已经使用了氧化铝负载的纳米级本体催化剂。在所有情况下，XANES都会确定反应过程中钒的平均氧化态。XANES还证明了纳米相具有更大的动态性，并且能够参与氧化还原催化循环，而其结构或钒的整体氧化态均无显着变化。在氧化条件下这种稳定性也是显而易见的。