caa a22 4500 475844750 CHVBK 20180406123911.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1023/A:1019172302952 doi (NATIONALLICENCE)springer-10.1023/A:1019172302952 Surface structure and metathesis activity of photoreduced allyl‐based Mo/SiO2 catalysts [Elektronische Daten] [Jane Aigler, Marwan Houalla, David Hercules] XPS and metathesis activity studies were performed on oxidic allyl‐based Mo/SiO2 catalysts (0.5 wt% Mo) and the oxidic catalyst following photoreduction to various extents. XPS results and average oxidation state measurements from the amount of CO2 formed during photoreduction, indicated that controlled photoreduction of the oxidic catalyst, in CO atmosphere, produces a mixture of Mo6+ and Mo4+ oxidation states with Mo4+ in abundances ranging from 0 to 100%. Propene metathesis activity studies were performed on the oxidic and photoreduced allyl‐based Mo/SiO2 catalysts. The results indicated that metathesis activity appears on photoreduction and increases linearly with increasing abundance of Mo4+ present on the catalyst. The linear relationship between the % propene conversion and the % Mo4+ present on the catalyst is consistent with the proposed uniformity of the Mo species and with the hypothesis that the active site (or active site precursor) is associated with Mo4+. Kluwer Academic Publishers, 2000 XPS nationallicence photoreduction nationallicence propene metathesis activity nationallicence Mo/silica catalysts nationallicence Mo oxidation states nationallicence Aigler Jane Department of Chemistry, Vanderbilt University, 37235, Nashville, TN, USA aut Houalla Marwan Department of Chemistry, Vanderbilt University, 37235, Nashville, TN, USA aut Hercules David Department of Chemistry, Vanderbilt University, 37235, Nashville, TN, USA aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 10/1-2(2000-03-01), 123-126 1022-5528 10:1-2<123 2000 10 11244 https://doi.org/10.1023/A:1019172302952 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1019172302952 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Aigler Jane Department of Chemistry, Vanderbilt University, 37235, Nashville, TN, USA aut NATIONALLICENCE 700 1- Houalla Marwan Department of Chemistry, Vanderbilt University, 37235, Nashville, TN, USA aut NATIONALLICENCE 700 1- Hercules David Department of Chemistry, Vanderbilt University, 37235, Nashville, TN, USA aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 10/1-2(2000-03-01), 123-126 1022-5528 10:1-2<123 2000 10 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer