Publications2020-06-29T18:00:34+02:00

Publications (2020)

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Biofuels

Authors: Campos-Martin, JM; Chica, A; Domine, ME; Garcia, T; Pawelec, B; Pinilla, JL; Rojas, S; Serra, JM; Suelves, I

Article.
Bol. Grupo Esp. Carbon. vol: . page: 2172-6094.
Date: DEC. 2020.
Pdf: http://www.gecarbon.org/boletines/articulos/BoletinGEC_058-art6.pdf

Abstract:
Biofuels will play a key role in the energy of the future, especially in the transport sector, reducing the current dependence on oil and the greenhouse gas emissions associated with this sector. Biomass, and in particular lignocellulosic biomass, is the essential raw material for the production of renewable biofuels. Therefore, it is necessary to develop innovative, efficient and sustainable technologies for biomass valorization in an integrated biorefinery. This article [read more]

Hydrogen Technologies

Authors: Chica, A; Fernandez, A; Fernandez, JR; Grasa, G; Laguna-Bercero, MA; Lazaro, MJ; Martinez, I; Pena, MA; Pinilla, JL; Sebastian, D; Serra, JM; Serra, M; Suelves, I; Valino, L

Article.
Bol. Grupo Esp. Carbon. vol: . page: 2172-6094.
Date: DEC. 2020.
Pdf: http://www.gecarbon.org/boletines/articulos/BoletinGEC_058-art5.pdf

Abstract:
The interest in hydrogen technologies has grown in recent years, mainly because an economy based on hydrogen can help to solve important challenges related to the global economy of the future: energy security and climate change. Taking advantage of this momentum, more and more countries are implementing a growing number of policies related to hydrogen. Indeed, the European Hydrogen [read more]

Exploring the alternative MnO-Na2CO3 thermochemical cycle for water splitting

Authors: Bayon, A; O’Shea, VAD; Serrano, DP; Coronado, JM

Article.
J. CO2 Util.. vol: 42. page: 2212-9820.
Date: DEC. 2020.
Doi: 10.1016/j.jcou.2020.101264.

Abstract:
Thermochemical cycles for H2O and CO2 splitting using CeO2 have demonstrated high efficiency (> 5%) and fast kinetics. Alternative multistage cycles based on stoichiometric oxides, such as Mn-Na, can potentially provide much larger efficiencies under less stringent operation conditions. However, these cycles consist of three stages operating at very different temperatures (from 50 degrees C to 1500 degrees C) and, accordingly, the overall energy yield of the cycle critically depends on efficient heat recovery. Despite of this, recently the Mn3O4-Na2CO3 cycle has shown [read more]

SBA-15 with short channels for laccase immobilization

Authors: Khanmohammadi, F; Molina, MA; Blanco, RM; Azizi, SN; Marquez-Alvarez, C; Diaz, I

Article.
Microporous Mesoporous Mat.. vol: 309. page: 1387-1811.
Date: DEC 15. 2020.
Doi: 10.1016/j.micromeso.2020.110527.

Abstract:
Ordered Mesoporous Materials offer wide application areas in chemistry and biotechnology. SBA-15 displays hexagonal arrangement of parallel unidirectional channels, where pore size and particle morphology are the controlling parameters when used as enzyme support to favour the diffusion of the protein molecules. The synthesis conditions can be controlled to yield the desired structural and morphological features of the material, as well as the functionalization of its surface to improve chemical affinity with the enzyme. Functionalization with amine groups [read more]

Effect of surface area and physical-chemical properties of graphite and graphene-based materials on their adsorption capacity towards metronidazole and trimethoprim antibiotics in aqueous solution

Authors: Carrales-Alvarado, DH; Rodriguez-Ramos, I; Leyva-Ramos, R; Mendoza-Mendoza, E; Villela-Martinez, DE

Article.
Chem. Eng. J.. vol: 402. page: 1385-8947.
Date: DEC 15. 2020.
Doi: 10.1016/j.cej.2020.126155.

Abstract:
The adsorption of metronidazole (MNZ) and trimethoprim (TMP) antibiotics from water on nanomaterials synthesized from graphene oxide and graphite, was examined thoroughly. The effect of the physicochemical properties and surface area onto the adsorption capacity of the nanomaterials was studied in detail. The nanocarbon materials used were graphene oxide (GO), and GO reduced in inert medium (rGO) or ammonia (N-rGO), and four high surface area graphites (HSAG100, HSAG300, HSAG400, HSAG500). The nanomaterials characterization was performed by transmission and scanning electron [read more]

Process design and techno-economic analysis of gas and aqueous phase maleic anhydride production from biomass-derived furfural

Authors: Agirre, I; Gandarias, I; Granados, ML; Arias, PL

Article.
Biomass Convers. Biorefinery. vol: 10. page: 2190-6815.
Date: DEC. 2020.
Doi: 10.1007/s13399-019-00462-w.

Abstract:
Maleic anhydride is used worldwide for a wide range of applications: from the manufacture of resins to lubricant additives or agricultural chemicals. The current production processes use benzene or butane as raw materials. This work shows the conceptual design of two novel processes using furfural as raw material: (i) aqueous phase oxidation with H2O2 and (ii) gas phase oxidation with O-2. The aqueous process uses a cheaper furfural feedstock, but the purification train is complicated due to the vast amount of water and [read more]

Arylative Allenol Cyclization via Sequential One-pot Enzyme & Palladium Catalysis

Authors: Naapuri, JM; Aberg, GA; Palomo, JM; Deska, J

Article; Early Access.
ChemCatChem. vol: . page: 1867-3880.
Date: . 03 December 2020
Doi: 10.1002/cctc.202001619.

Abstract:
The one-pot combination of halogenation biocatalysis and Suzuki-type cross coupling enables the direct arylative cyclization of allenic alcohols with boronic acids. This modular approach to unsaturated five-membered O-heterocycles proceeds in an aqueous emulsion with air as terminal oxidant. Here, the enzymatic oxidative activation of simple halide salts acts as traceless ring-closure-inducing event to trigger the subsequent C-C coupling. With the original protocol merging soluble proteins and a homogeneous SPhos-based palladium catalyst as a template, a novel heterogeneous nanobiohybrid was developed. [read more]

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Bi2O3/g-C3N4 nanocomposites as proficient photocatalysts for hydrogen generation from aqueous glycerol solutions beneath visible light

Authors: Alhaddad, M; Navarro, RM; Hussein, MA; Mohamed, RM

Article.
Ceram. Int.. vol: 46. page: 0272-8842.
Date: NOV. 2020.
Doi: 10.1016/j.ceramint.2020.06.271.

Abstract:
A sequence of Bi2O3/g-C3N4 nanocomposites with diverse Bi2O3 content (0.5-5 molar %) has been synthesized by the sonication-mixture method using mesoporous beta-Bi2O3 and g-C3N4 and utilized as efficient photocatalysts for hydrogen generation from aqueous glycerol solutions beneath visible light irradiation. Mesoporous Bi2O3 particles were effectively integrated at the exterior of two-dimensional (2D) g-C3N4 nanolayers producing effective heterojunctions that facilitate the charge transference amongst g-C3N4 and Bi2O3 and minimize the recombination of photocharges. The number and efficiency of the heterojunctions in the Bi2O3/g-C3N4 nanocomposites depend [read more]

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Iron Oxide-Iron Sulfide Hybrid Nanosheets as High-Performance Conversion-Type Anodes for Sodium-Ion Batteries

Authors: Rubio, S; Maca, RR; Ortiz, GF; Vicente, CP; Lavela, P; Etacheri, V; Tirado, JL

Article.
ACS Appl. Energ. Mater.. vol: 3. page: 2574-0962.
Date: nov-23. 2020.
Doi: 10.1021/acsaem.0c01814.

Abstract:
Commercialization of Na-ion batteries is hindered by the shortage of abundant and environmentally benign electrode materials with high electrochemical performance. Most of the high-capacity alloying- and conversion-type anodes face rapid capacity loss during prolonged cycling. Herein, we report superior Na-ion storage performance of iron oxide-iron sulfide hybrid nanosheet anodes. Composite anodes containing Fe2O3-FeS and Fe3O4-FeS hybrid nanosheets demonstrated high specific capacities of 487 and 364 mA h g(-1), respectively, at a 0.1C rate. These electrodes also [read more]

Iron Oxide-Iron Sulfide Hybrid Nanosheets as High-Performance Conversion-Type Anodes for Sodium-Ion Batteries

Authors: Rubio, S; Maca, RR; Ortiz, GF; Vicente, CP; Lavela, P; Etacheri, V; Tirado, JL

Article.
ACS Appl. Energ. Mater.. vol: 3. page: 2574-0962.
Date: nov-23. 2020.
Doi: 10.1021/acsaem.0c01814.

Abstract:
Commercialization of Na-ion batteries is hindered by the shortage of abundant and environmentally benign electrode materials with high electrochemical performance. Most of the high-capacity alloying- and conversion-type anodes face rapid capacity loss during prolonged cycling. Herein, we report superior Na-ion storage performance of iron oxide-iron sulfide hybrid nanosheet anodes. Composite anodes containing Fe2O3-FeS and Fe3O4-FeS hybrid nanosheets demonstrated high specific capacities of 487 and 364 mA h g(-1), respectively, at a 0.1C rate. These electrodes also [read more]

Synthesis and photophysical studies of an indigo derivative: N-octyl-7,7 ‘-diazaindigo

Authors: de Miguel, G; Garzon-Ruiz, A; Navarro, A; Garcia-Frutos, EM

Article.
RSC Adv.. vol: 10. page: .
Date: nov-22. 2020.
Doi: 10.1039/d0ra06451c.

Abstract:
In this paper, we explore the synthesis, characterization, and photophysical properties of a novel indigo derivative, N-octyl-7,7 ‘-diazaindigo, being the first time that diazaindigos have been studied as photophysically-active chemical entities. Reduction of the neutral “keto-form” to the so-called “leuco-form” changes the global spectroscopic and photophysical behaviors. Both species have been investigated by different photophysical studies, such as analysis of absorption and emission spectra, fluorescence quantum yields (phi(F)) and lifetimes. Finally, to appraise in depth the deactivation of the excited state of the [read more]

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Optimization of the Catalytic Layer for Alkaline Fuel Cells Based on Fumatech Membranes and Ionomer

Authors: Sebastian, D; Lemes, G; Luque-Centeno, JM; Martinez-Huerta, MV; Pardo, JI; Lazaro, MJ

Article.
Catalysts. vol: 10. page: .
Date: NOV. 2020.
Doi: 10.3390/catal10111353.

Abstract:
Polymer electrolyte fuel cells with alkaline anion exchange membranes (AAEMs) have gained increasing attention because of the faster reaction kinetics associated with the alkaline environment compared to acidic media. While the development of anion exchange polymer membranes is increasing, the catalytic layer structure and composition of electrodes is of paramount importance to maximize fuel cell performance. In this work, we examine the preparation procedures for electrodes by catalyst-coated substrate to be used with a well-known commercial AAEM, Fumasep(R) FAA-3, and a [read more]

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Visible light production of hydrogen from glycerol over Cu2O-gC(3)N(4) nanocomposites with enhanced photocatalytic efficiency

Authors: Alhaddad, M; Navarro, RM; Hussein, MA; Mohamed, RM

Article.
J. Mater. Res. Technol-JMRT. vol: 9. page: 2238-7854.
Date: nov-15. 2020.
Doi: 10.1016/j.jmrt.2020.10.093.

Abstract:
In this work, we investigate nanostructured Cu2O-gC(3)N(4) composites with diverse Cu2O addition (0.5-3.0 mol %) prepared by ultrasonication-mixture of mesoporous Cu20 and g-C3N4 prepared individually from soft and hard -template sol gel, respectively. The efficiency of the Cu2O-gC(3)N(4) nanocomposites depends on the Cu2O/gC(3)N(4) ratio because it controls the heterojunctions development between them. The synergistic influence amid Cu2O and g-C3N4 in the nanostructured composites was demonstrated in the production of hydrogen under simulated light achieving a maximum efficiency at 2 mol % of [read more]

Recent Advances in Enzymatic and Chemoenzymatic Cascade Processes

Authors: Losada-Garcia, N; Cabrera, Z; Urrutia, P; Garcia-Sanz, C; Andreu, A; Palomo, JM

Review.
Catalysts. vol: 10. page: .
Date: NOV. 2020.
Doi: 10.3390/catal10111258.

Abstract:
Cascade reactions have been described as efficient and universal tools, and are of substantial interest in synthetic organic chemistry. This review article provides an overview of the novel and recent achievements in enzyme cascade processes catalyzed by multi-enzymatic or chemoenzymatic systems. The examples here selected collect the advances related to the application of the sequential use of enzymes in natural or genetically modified combination; second, the important combination of enzymes and metal complex systems, and finally we [read more]

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Unravelling the Structural Modification (Meso-Nano-) of Cu/ZnO-Al2O3 Catalysts for Methanol Synthesis by the Residual NaNO3 in Hydroxycarbonate Precursors

Authors: Guil-Lopez, R; Mota, N; Llorente, J; Millan, E; Pawelec, BG; Fierro, JLG; Navarro, RM

Article.
Catalysts. vol: 10. page: .
Date: NOV. 2020.
Doi: 10.3390/catal10111346.

Abstract:
The effects of residual NaNO3 on the modification of Cu/ZnO-Al2O3 catalysts have been extensively documented, but the modification mechanism is so far unclear. This work studies in detail the influence of the residual sodium nitrate present in the hydroxycarbonate precursors on their decomposition during calcination and how it affects to the formation and configuration of the final active sites of the Cu/ZnO-Al2O3 catalysts. Different samples with varying sodium content after washing (from 0.01 to 7.3 [read more]

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