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Browsing by Author "Megías Sayago, Cristina"
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Article
5-Hydroxymethyl-2-Furfural Oxidation Over Au/CexZr1-xO2 Catalysts
Megías Sayago, Cristina; Bonincontro, Danilo; Lolli, Alice; Ivanova, Svetlana; Albonetti, Stefania; Cavani, Fabrizio; Odriozola Gordón, José Antonio (Frontiers Media, 2020)A series of gold catalysts supported on pure CeO2, ZrO2, and two different Ce-Zr mixed oxides have been prepared and ...
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Article
Alkane Metathesis over Immobilized Pincer-ligated Iridium Complexes: Effect of Support Nature
Megías Sayago, Cristina; Centeno Vega, Ignacio; Bobadilla Baladrón, Luis Francisco; Ivanova, Svetlana; Rendón Márquez, Nuria; Suárez, Andrés (Elsevier, 2023)In this work, catalytic alkane metathesis has been evaluated as a suitable approach to upcycle hydrocarbons (polyolefins) ...
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Article
Au/Al2O3 – Efficient catalyst for 5-hydroxymethylfurfural oxidation to 2,5-furandicarboxylic acid
Megías Sayago, Cristina; Lolli, Alice; Ivanova, Svetlana; Albonetti, Stefania; Cavani, Fabrizio; Odriozola Gordón, José Antonio (Elsevier, 2019)The catalytic activity of a simple Au/Al2O3 catalytic system prepared by the direct anionic exchange (DAE) method was ...
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Article
Au/CeO2-ZnO/Al2O3 as Versatile Catalysts for Oxidation Reactions: Application in Gas/Liquid Environmental Processes
Megías Sayago, Cristina; Ramírez Reina, Tomás; Ivanova, Svetlana; Odriozola Gordón, José Antonio (Frontiers Media, 2019)The present work showcases the versatility of nanogold systems supported on Zn-doped ceria when applied in two important ...
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PhD Thesis
Catalizadores híbridos bifuncionales para la valorización química de biomasa
Megías Sayago, Cristina (2017-09-29)El concepto de biorrefinería, aunque conocido desde finales del siglo pasado , ha sido objeto de numerosas definiciones ...
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Article
Effect of Gold Particles Size over Au/C Catalyst Selectivity in HMF Oxidation Reaction
Megías Sayago, Cristina; Lolli, Alice; Bonincontro, Danilo; Penkova, Anna Dimitrova; Albonetti, Stefania; Cavani, Fabrizio; Odriozola Gordón, José Antonio; Ivanova, Svetlana (Wiley-Blackwell, 2020)A series of gold nanoparticles in the 4–40 nm range were prepared, immobilized on activated carbon and further tested, at ...
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Article
Epimerization of glucose over ionic liquid/phosphomolybdate hybrids: structure-activity relationship
Megías Sayago, Cristina; Álvarez González, Eleuterio; Ivanova, Svetlana; Odriozola Gordón, José Antonio (Royal Society of Chemistry, 2018)The influence of the crystal structure and chemical nature of some ionic liquid/phosphomolybdate hybrids on their catalytic ...
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Article
Functionalized Biochars as Supports for Ru/C Catalysts: Tunable and Efficient Materials for γ-Valerolactone Production
Bounoukta, Charf Eddine; Megías Sayago, Cristina; Navarro de Miguel, Juan Carlos; Ammari, Fatima; Ivanova, Svetlana; Centeno, Miguel Ángel; Odriozola Gordón, José Antonio (MDPI, 2023)Cotton stalks-based biochars were prepared and used to synthetize Ru-supported catalysts for selective production of ...
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Article
Gold catalyst recycling study in base-free glucose oxidation reaction
Megías Sayago, Cristina; Bobadilla Baladrón, Luis Francisco; Ivanova, Svetlana; Penkova, Anna Dimitrova; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (Elsevier, 2018)This work is devoted to the study of viability of immobilized gold colloids on carbon as catalysts for the base-free ...
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Article
Gold catalysts screening in base-free aerobic oxidation of glucose to gluconic acid
Megías Sayago, Cristina; Ivanova, Svetlana; López Cartes, Carlos; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (Elsevier, 2017-01-01)Base-free aerobic oxidation of glucose in presence of Au/Al2O3, Au/CeO2, Au/CeO2(20 wt%)/Al2O3, Au/CeO2(25 wt%)/ZrO2 and ...
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Article
H2 oxidation as criterion for PrOx catalyst selection: Examples based on Au-CoOx-supported systems
Ramírez Reina, Tomás; Megías Sayago, Cristina; Pérez Flórez, Alejandro; Ivanova, Svetlana; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (Elsevier, 2015-06-01)A new approach for understanding PrOx reaction over gold catalysts is proposed in this work. The competition between H2 ...
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Article
Immobilization of Stabilized Gold Nanoparticles on Various Ceria-Based Oxides: Influence of the Protecting Agent on the Glucose Oxidation Reaction
Chenouf, Meriem; Megías Sayago, Cristina; Ammari, Fatima; Ivanova, Svetlana; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (MDPI, 2019-01)The influence of the protecting agent’s nature on gold particle size and dispersion was studied in this work over a series ...
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Article
Influence of gold particle size in Au/C catalysts for base-free oxidation of glucose
Megías Sayago, Cristina; Santos Muñoz, José Luis; Ammari, Fatima; Chenouf, Meriem; Ivanova, Svetlana; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (Elsevier, 2017)A series of gold colloids were prepared and immobilized on commercial activated carbon. The influence of the colloid ...
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Article
Influence of the ionic liquid presence on the selective oxidation of glucose over molybdenum based catalysts
Megías Sayago, Cristina; Carrasco Carrasco, Carlos Jesús; Ivanova, Svetlana; Montilla Ramos, Francisco Javier; Galindo del Pozo, Agustín; Odriozola Gordón, José Antonio (Elsevier, 2016-12-01)Two different approaches are proposed in this work in order to study the influence of the ionic liquid presence in the ...
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Article
Recent advances in selective oxidation of biomass-derived platform chemicals over gold catalysts
Megías Sayago, Cristina; Navarro Jaén, Sara; Castillo, Rafael; Ivanova, Svetlana (Elsevier, 2020)Gold is without a doubt the best known metal for chemical oxidation. The noblest of the noble metals gained its place ...
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Article
Recent advances in the brønsted/lewis acid catalyzed conversion of glucose to hmf and lactic acid: Pathways toward bio-based plastics
Megías Sayago, Cristina; Navarro Jaén, Sara; Drault, Fabien; Ivanova, Svetlana (Multidisciplinary Digital Publishing Institute (MDPI), 2021)One of the most trending topics in catalysis recently is the use of renewable sources and/or non-waste technologies to ...
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Article
Selective hydrodeoxygenation of levulinic acid to γ-valerolactone over Ru supported on functionalized carbon nanofibers
Bounoukta, Charf Eddine; Megías Sayago, Cristina; Rendón Márquez, Nuria; Ammari, Fatima; Penkova, Anna; Ivanova, Svetlana; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (Royal Society of Chemistry, 2023)In this work, carbon nanofibers (CNFs) have been successfully functionalized by using different approaches and finally ...
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Article
Understanding the Role of the Acid Sites in 5-Hydroxymethylfurfural Oxidation to 2,5-Furandicarboxylic Acid Reaction over Gold Catalysts: Surface Investigation on CexZr1- xO2 Compounds
Megías Sayago, Cristina; Chakarova, Kristina; Penkova, Anna Dimitrova; Lolli, Alice; Ivanova, Svetlana; Albonetti, Stefania; Cavani, Fabrizio; Odriozola Gordón, José Antonio (American Chemical Society, 2018-12-07)A series of CexZr1-xO2 supports with different Ce/Zr molar ratios were utilized for the preparation of gold catalyst used ...