https://cosmosscholars.com/phms/index.php/jacst <p style="text-align: justify;"><span style="font-size: 10pt; font-family: arial,helvetica,sans-serif; color: #000000;"><strong>Journal of Advanced Catalysis Science and Technology</strong> is a peer reviewed scientific journal that provide an international forum for scientists, engineers, researchers and academicians working in the field of catalytic science and technology. Premium articles reporting applied fundamental, experimental and computational research in aforementioned field are main theme of this journal.</span></p><p style="text-align: justify;"><span style="font-size: 10pt; font-family: arial,helvetica,sans-serif; color: #000000;">We welcome original research articles as well as review articles and short communication related to all aspects of catalysis.</span></p> Cosmos Schoalrs Publishing House en-US J. of Advanced Catalysis Science and Technology 2408-9834 <h4>Policy for Journals/Articles with Open Access</h4>Authors who publish with this journal agree to the following terms:<br /><ol type="a"><ol type="a"><li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="http://creativecommons.org/licenses/by/3.0/" target="_new">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li></ol></ol><br /><ol type="a"><li>Authors are permitted and encouraged to post links to their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work</li></ol><h4>Policy for Journals / Manuscript with Paid Access</h4>Authors who publish with this journal agree to the following terms:<br /><ol type="a"><ol type="a"><li>Publisher retain copyright .</li></ol></ol><br /><ol type="a"><li>Authors are permitted and encouraged to post links to their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work .</li></ol> https://cosmosscholars.com/phms/index.php/jacst/article/view/926 <strong>Abstract:</strong> In the present study, a renewed approach was made to optimize the redox functionality of the well-known catalytic system MoO₃-V₂O₅/ TiO₂ (anatase) in relation to various dispersion patterns. Several types of composite catalysts were considered: xV/T (x of V₂O₅= 2-12 wt %), 6Mo-xV/T co-impregnates, yMo-8V/T co-impregnates (y of MoO₃= 3-9 wt %), 6Mo-doped 8V/T (coat 1) and 8V-doped Mo/T (coat 2). The samples were characterized by adopting the XRD, FTIR, ESR, TEM, N₂ physisorption, high temperature H₂-chemisorption and high temperature O₂-chemisorptrion (HTOC), techniques. The redox reactivity was estimated in decomposition of H₂O₂ in highly concentrated solution, permitting the formation of several peroxo V intermediates. In xV/T system, the constancy of TON with loading indicated the involvement of single vanadia site, not sensitive to the surface dispersion, but rather depended on the nature of coordination of H₂O₂ molecules to VO_x species. For different co-impregnates of Mo and V, the added molybdena, increasing the Lewis acidity, seemed to undergo a competitive interaction with titania to form non-reducible surface compound, with increased density of surface VOx patches. This was confirmed from H₂-uptakes linked with highly stabilized V⁴⁺ species. The sample of coat 1had the same dispersion and reactivity patterns of the other members of co-impregnated series, with formation of non-reducible surface compound through Mo-O-V bridges. In coat 2 sample, the VOx species existed on the top surface of supported MoO₃/TiO₂ in a better dispersion state, with higher apparent density of surface patches, exhibiting comparable [A] and TON values to those of xV/T samples. Salah A. Hassan Hamdi A. Hassan Atef S. Darwish Copyright (c) 6 2 10 20