{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T15:29:56Z","timestamp":1789140596217,"version":"build-2803163510"},"reference-count":48,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2023,1,23]],"date-time":"2023-01-23T00:00:00Z","timestamp":1674432000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Science Centre in Poland","award":["2018\/29\/B\/ST5\/00137"],"award-info":[{"award-number":["2018\/29\/B\/ST5\/00137"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>The aim of this study was to get insight into the pathway of the acetaldehyde formation from ethanol (the rate-limiting step in the production of 1,3-butadiene) on Cu-SBA-15 and Cu-MnSBA-15 mesoporous molecular sieves. Physicochemical properties of the catalysts were investigated by XRD, N2 ads\/des, Uv-vis, XPS, EPR, pyridine adsorption combined with FTIR, 2-propanol decomposition and 2,5-hexanedione cyclization and dehydration test reactions. Ethanol dehydrogenation to acetaldehyde (without and with oxygen) was studied in a flow system using the FTIR technique. In particular, the effect of Lewis acid and basic (Lewis and Br\u00d8nsted) sites, and the oxygen presence in the gas reaction mixture with ethanol on the activity and selectivity of copper catalysts, was assessed and discussed. Two different reaction pathways have been proposed depending on the reaction temperature and the presence or absence of oxygen in the flow of the reagents (via ethoxy intermediate way at 593 K, in ethanol flow, or ethoxide intermediate way at 473 K in the presence of ethanol and oxygen in the reaction mixture).<\/jats:p>","DOI":"10.3390\/ijms24032252","type":"journal-article","created":{"date-parts":[[2023,1,24]],"date-time":"2023-01-24T01:29:45Z","timestamp":1674523785000},"page":"2252","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Activation of Ethanol Transformation on Copper-Containing SBA-15 and MnSBA-15 Catalysts by the Presence of Oxygen in the Reaction Mixture"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1047-1696","authenticated-orcid":false,"given":"Izabela","family":"Sobczak","sequence":"first","affiliation":[{"name":"Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7070-3199","authenticated-orcid":false,"given":"Joanna","family":"Wisniewska","sequence":"additional","affiliation":[{"name":"Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Piotr","family":"Decyk","sequence":"additional","affiliation":[{"name":"Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2104-5411","authenticated-orcid":false,"given":"Maciej","family":"Trejda","sequence":"additional","affiliation":[{"name":"Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5050-4042","authenticated-orcid":false,"given":"Maria","family":"Ziolek","sequence":"additional","affiliation":[{"name":"Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"4860","DOI":"10.1039\/D0CY00784F","article-title":"Ethanol-to-Butadiene: The Reaction and Its Catalysts","volume":"10","author":"Pomalaza","year":"2020","journal-title":"Catal. Sci. Technol."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Bartholomew, C.H., and Farrauto, R.J. (2006). Fundamentals of Industrial Catalytic Processes, John Wiley. [2nd ed.].","DOI":"10.1002\/9780471730071"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"377","DOI":"10.1002\/cssc.201402632","article-title":"On the Chemistry of Ethanol on Basic Oxides: Revising Mechanisms and Intermediates in the Lebedev and Guerbet Reactions","volume":"8","author":"Chieregato","year":"2015","journal-title":"ChemSusChem"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"7917","DOI":"10.1039\/C4CS00105B","article-title":"Review of Old Chemistry and New Catalytic Advances in the On-Purpose Synthesis of Butadiene","volume":"43","author":"Makshina","year":"2014","journal-title":"Chem. Soc. Rev."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1016\/0021-9517(75)90067-6","article-title":"The Mechanism of Dehydrogenation of Ethanol on Magnesium Oxide","volume":"38","author":"Takezawa","year":"1975","journal-title":"J. Catal."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"499","DOI":"10.1006\/jcat.1998.2161","article-title":"Structure and Surface and Catalytic Properties of Mg-Al Basic Oxides","volume":"178","author":"Xu","year":"1998","journal-title":"J. Catal."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"10969","DOI":"10.1021\/jp050721q","article-title":"An Ethoxy Intermediate in Ethanol Dehydration on Br\u00f8nsted Acid Sites in Zeolite","volume":"109","author":"Kondo","year":"2005","journal-title":"J. Phys. Chem. B"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"12800","DOI":"10.1021\/acs.jpcc.7b02957","article-title":"Surface Structure Dependence of the Dry Dehydrogenation of Alcohols on Cu(111) and Cu(110)","volume":"121","author":"Wang","year":"2017","journal-title":"J. Phys. Chem. C"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"2367","DOI":"10.1002\/cctc.201300033","article-title":"Mechanistic Study of Ethanol Dehydrogenation over Silica-Supported Silver","volume":"5","author":"Sushkevich","year":"2013","journal-title":"ChemCatChem"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Sobczak, I., Kowalska, T.C., Nowicka, M., and Ziolek, M. (2022). Microwave-Assisted Base-Free Oxidation of Glucose with H2O2 on Gold-and Manganese-Containing SBA-15\u2014Insight into Factors Affecting the Reaction Pathway. Int. J. Mol. Sci., 23.","DOI":"10.3390\/ijms23094639"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"7586","DOI":"10.1021\/jp910288x","article-title":"Soft-Chemical Approach of Noble Metal Nanowires Templated from Mesoporous Silica (SBA-15) through Vapor Infiltration of a Reducing Agent","volume":"114","author":"Takai","year":"2010","journal-title":"J. Phys. Chem. C"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1664","DOI":"10.1039\/b110598c","article-title":"Direct Syntheses of Ordered SBA-15 Mesoporous Materials Containing Arenesulfonic Acid Groups","volume":"12","author":"Melero","year":"2002","journal-title":"J. Mater. Chem."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1051","DOI":"10.1515\/pac-2014-1117","article-title":"Physisorption of Gases, with Special Reference to the Evaluation of Surface Area and Pore Size Distribution (IUPAC Technical Report)","volume":"87","author":"Thommes","year":"2015","journal-title":"Pure Appl. Chem."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"114","DOI":"10.1016\/j.molcata.2014.03.015","article-title":"Au Containing Mesostructured Cellular Foams NbMCF and ZrMCF in Selective Oxidation of Methanol to Formaldehyde","volume":"390","author":"Sobczak","year":"2014","journal-title":"J. Mol. Catal. A Chem."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1016\/j.cattod.2019.06.036","article-title":"Bimetallic Gold-Silver Catalysts Based on ZnO and Zn\/SBA-15\u2014The Effect of Various Treatments on Surface and Catalytic Properties","volume":"356","author":"Kaskow","year":"2020","journal-title":"Catal. Today"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1016\/j.micromeso.2007.09.012","article-title":"A New Route for the Synthesis of Manganese Incorporated SBA-15","volume":"112","author":"Kumar","year":"2008","journal-title":"Microporous Mesoporous Mater."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"8100","DOI":"10.1021\/jp2034054","article-title":"Redox Properties of Manganese-Containing Zirconia Solid Solution Catalysts Analyzed by in Situ UV-Vis Spectroscopy and Crystal Field Theory","volume":"115","author":"Klokishner","year":"2011","journal-title":"J. Phys. Chem. A"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"2340","DOI":"10.1039\/c3cy00306j","article-title":"Direct Synthesis of Mn-Ti-SBA-15 Catalyst for the Oxidation of Ethylbenzene","volume":"3","author":"Visuvamithiran","year":"2013","journal-title":"Catal. Sci. Technol."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1016\/j.cplett.2003.12.077","article-title":"Study of Copper Nanoparticles Formation on Supports of Different Nature by UV-Vis Diffuse Reflectance Spectroscopy","volume":"385","author":"Pestryakov","year":"2004","journal-title":"Chem. Phys. Lett."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"2730","DOI":"10.1016\/j.apsusc.2008.08.110","article-title":"XPS Study of the Cu@Cu2O Core-Shell Nanoparticles","volume":"255","author":"Ghodselahi","year":"2008","journal-title":"Appl. Surf. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1016\/j.apcata.2014.12.007","article-title":"Nickel-Promoted Copper-Silica Nanocomposite Catalysts for Hydrogenation of Levulinic Acid to Lactones Using Formic Acid as a Hydrogen Feeder","volume":"491","author":"Upare","year":"2015","journal-title":"Appl. Catal. A Gen."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1481","DOI":"10.1021\/jp9094529","article-title":"Nature and Location of Copper Nanospecies in Mesoporous Molecular Sieves","volume":"114","author":"Sapag","year":"2010","journal-title":"J. Phys. Chem. C"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1016\/j.molcata.2016.08.019","article-title":"Gas-Phase Epoxidation of Propylene by Molecular Oxygen over Ag-CuCl2\/BaCO3 Catalyst with Low CuCl2 Doping: Catalytic Performance, Deactivation and Regeneration","volume":"424","author":"Zhang","year":"2016","journal-title":"J. Mol. Catal. A Chem."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1016\/0039-6028(92)90748-U","article-title":"X-Ray Photoelectron Spectroscopic Characterization of Ultra-Thin Silicon Oxide Films on a Mo(100) Surface","volume":"279","author":"He","year":"1992","journal-title":"Surf. Sci."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"G640","DOI":"10.1149\/1.1409400","article-title":"A Novel Method of Etching Copper Oxide Using Acetic Acid","volume":"148","author":"Chavez","year":"2001","journal-title":"J. Electrochem. Soc."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"12796","DOI":"10.1039\/C5TA01108F","article-title":"Synthesis of Porous Cu2O\/CuO Cages Using Cu-Based Metal-Organic Frameworks as Templates and Their Gas-Sensing Properties","volume":"3","author":"Wang","year":"2015","journal-title":"J. Mater. Chem. A"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1016\/S1387-1811(02)00358-X","article-title":"Characterization of MCM-41 Mesoporous Molecular Sieves Containing Copper and Zinc and Their Catalytic Performance in the Selective Oxidation of Alcohols to Aldehydes","volume":"54","author":"Velu","year":"2002","journal-title":"Microporous Mesoporous Mater."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2005","DOI":"10.1039\/a909427j","article-title":"In Situ Characterization of the Coordination Sphere of Cu(II) Complexes Supported on Silica during the Preparation of Cu\/SiO2 Catalysts by Cation Exchange","volume":"2","author":"Trouillet","year":"2000","journal-title":"Phys. Chem. Chem. Phys."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"7851","DOI":"10.1021\/jp056604c","article-title":"Dependence of Copper Species on the Nature of the Support for Dispersed CuO Catalysts","volume":"110","author":"Gervasini","year":"2006","journal-title":"J. Phys. Chem. B"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"11533","DOI":"10.1021\/j100095a039","article-title":"Electron Paramagnetic Resonance Studies of Copper Ion-Exchanged ZSM-5","volume":"98","author":"Larsen","year":"1994","journal-title":"J. Phys. Chem."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"510","DOI":"10.1016\/0021-9517(92)90081-R","article-title":"The Interaction of NO with Copper Ions in ZSM-5: An EPR and IR Investigation","volume":"136","author":"Giamello","year":"1992","journal-title":"J. Catal."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"4831","DOI":"10.1021\/jp970662j","article-title":"EPR Investigation of the Electronic Structure of Mononuclear Copper(I) Nitric Oxide Adduct Formed upon Low-Pressure Adsorption of NO onto Cu\/ZSM-5 Zeolite","volume":"101","author":"Sojka","year":"1997","journal-title":"J. Phys. Chem. B"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"101","DOI":"10.1006\/jcat.2002.3510","article-title":"Physicochemical Properties and Catalytic Activity of Cu-NbZSM-5\u2014A Comparative Study with Cu-AlZSM-5","volume":"207","author":"Sobczak","year":"2002","journal-title":"J. Catal."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1006\/jcat.1993.1145","article-title":"Determination of Integrated Extinction Coefficients for Infrared Absorption Bands of Pyridine Adsorbed on Solid Acid Catalysts","volume":"141","author":"Emeis","year":"1993","journal-title":"J. Catal."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"371","DOI":"10.1016\/0021-9517(63)90102-7","article-title":"An Infrared Study of Pyridine Adsorbed on Acidic Solids. Characterization of Surface Acidity","volume":"2","author":"Parry","year":"1963","journal-title":"J. Catal."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1016\/j.cattod.2019.05.012","article-title":"The Influence of Zr Presence in Short Channel SBA-15 on State and Activity of Metallic Modifiers (Ag, Au, Cu, Fe)","volume":"356","author":"Wisniewska","year":"2020","journal-title":"Catal. Today"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"219","DOI":"10.1023\/A:1018979731407","article-title":"Study of the Acidic Character of Modified Metal Oxide Surfaces Using the Test of Isopropanol Decomposition","volume":"43","author":"Gervasini","year":"1997","journal-title":"Catal. Lett."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1016\/0144-2449(90)90047-U","article-title":"Base- and Acid-Catalysed Cyclization of Diketones over ZSM-5","volume":"10","author":"Dessau","year":"1990","journal-title":"Zeolites"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1016\/0920-5861(95)00162-X","article-title":"Infrared Studies of the Reactive Adsorption of Organic Molecules over Metal Oxides and of the Mechanisms of Their Heterogeneously-Catalyzed Oxidation","volume":"27","author":"Busca","year":"1996","journal-title":"Catal. Today"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"364","DOI":"10.1016\/j.jcat.2022.02.006","article-title":"Tuning the Properties of the Cobalt-Zeolite Nanocomposite Catalyst by Potassium: Switching between Dehydration and Dehydrogenation of Ethanol","volume":"407","author":"Grzybek","year":"2022","journal-title":"J. Catal."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"251","DOI":"10.1063\/1.3114588","article-title":"Investigation of Dynamic Glass Transitions and Structural Transformations in Cryovacuum Condensates of Ethanol","volume":"35","author":"Aldiyarov","year":"2009","journal-title":"Low Temp. Phys."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1392","DOI":"10.1139\/v56-178","article-title":"The Infrared Absorption Spectra of Deuterated Esters: II. Ethyl Acetate","volume":"34","author":"Nolin","year":"1956","journal-title":"Can. J. Chem."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1007\/s10562-004-3752-y","article-title":"Adsorption and Surface Reactions of Acetaldehyde on Alumina-Supported Noble Metal Catalysts","volume":"101","author":"Kiss","year":"2005","journal-title":"Catal. Lett."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"272","DOI":"10.1016\/j.mcat.2018.01.018","article-title":"Butadiene from Ethanol Employing Doped T-ZrO2","volume":"458","author":"Chagas","year":"2018","journal-title":"Mol. Catal."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"74","DOI":"10.1126\/science.1195055","article-title":"Reactivity of the Gold\/Water Interface During Selective Oxidation Catalysis","volume":"330","author":"Zope","year":"2010","journal-title":"Science"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"548","DOI":"10.1126\/science.279.5350.548","article-title":"Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom Pores","volume":"279","author":"Zhao","year":"1998","journal-title":"Science"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"410","DOI":"10.1021\/cm8027725","article-title":"Synthesis of Thermally Stable and Highly Active Bimetallic Au-Ag Nanoparticles on Inert Supports","volume":"21","author":"Liu","year":"2009","journal-title":"Chem. Mater."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"2432","DOI":"10.1021\/acssuschemeng.6b00263","article-title":"Improvement of Gold-Catalyzed Oxidation of Free Carbohydrates to Corresponding Aldonates Using Microwaves","volume":"4","author":"Omri","year":"2016","journal-title":"ACS Sustain. Chem. Eng."}],"container-title":["International Journal of Molecular Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1422-0067\/24\/3\/2252\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T18:14:09Z","timestamp":1760120049000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1422-0067\/24\/3\/2252"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,1,23]]},"references-count":48,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2023,2]]}},"alternative-id":["ijms24032252"],"URL":"https:\/\/doi.org\/10.3390\/ijms24032252","relation":{},"ISSN":["1422-0067"],"issn-type":[{"value":"1422-0067","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,1,23]]}}}