Rafael Luque

Rafael Luque
University of Cordoba (Spain) | UCO · Department of Organic Chemistry

Chemistry

About

837
Publications
216,283
Reads
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30,422
Citations
Additional affiliations
January 2015 - December 2017
Universidade Federal de Pelotas
Position
  • Special Visiting Scientist of Science without Borders Programme
June 2014 - October 2014
Changchun Institute Of Applied Chemistry
Position
  • Visiting Professor of Chinese Academy of Sciences
July 2013 - January 2014
The Hong Kong University of Science and Technology
Position
  • Distinguished Engineering Fellow and Visiting Professor

Publications

Publications (837)
Article
Biomass conversion strategies can improve the sustainability of the chemical industry. However, often humins co-products are formed, lowering the economic value of the production of chemicals from biomass. The peculiar foaming ability of the humins can be employed for the synthesis of inorganic foams, such as alumina. By using two different methods...
Article
The oxygen reduction and evolution reaction (ORR/OER), are the keystones for many energy generating and storage devices, have influence with many electrocatalytic reactions. The sluggish kinetics of these reaction is a challenging situation on the surface of electrodes which imposes large over‐potential and affects the energy output of fuel cells....
Article
The hydrogenation/hydrogenolysis of 5-hydroxymethylfurfural (HMF) has been carried out either under single (aqueous) phase or batch multiphase (MP) conditions using mutually immiscible aqueous/hydrocarbon phases, 5 % Ru/C as a catalyst, and both with and without the use of trioctylmethyl phosphonium bis-(trifluoro methane) sulfonimide ([P8881 ][NTf...
Article
Full-text available
The growing global demand for renewable energy sources can be reached using biofuels such as biodiesel, for example. The most used route to produce biodiesel is the transesterification reaction of oils or fats with short-chain alcohols, generating fatty acid esters (biodiesel) and a very important by-product, glycerol (Gly). Gly is widely used in d...
Article
Co doped into 5% Zr-TiO2 ([email protected]% Zr/-TiO2) was prepared by a simple, facile sol-gel method, and employing in the catalytic transfer hydrogen (CTH) process starting from ethyl levulinate (EL) to γ-valerolactone (GVL). Lewis/Brønsted acid ratio and BET surface area increased with the incorporation of Co into Ti-Zr-O support. In addition,...
Article
This review depicts the exposure of self-sacrifice MOF, their structure, synthesis as well as potential application from a prodigious angle. We elaborated critically each of the self-sacrifice MOF with its worthy application, which based on shrewd design strategies and has been investigated by novel scientist for domain of self-sacrifice MOF. In th...
Article
Full-text available
Fatty Acid Ethyl Esters (FAEEs) were obtained via single-step esterification of non-edible raw materials, namely a distillate from the deodorization of palm oil (DDPO), an agro-industrial by-product of high concentration of free fatty acids (FFAs approximately 84%) with Ethanol (EtOH) over a solid acid catalyst MF4W15 prepared from Amazon flint kao...
Article
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Introduction of metal–organic frameworks (MOFs) beyond metal-carboxylate series and their applications are still challenging. An innovative porous porphyrin catecholate iron-based MOF (PorphCat-Fe) with a Brunauer–Emmett–Teller (BET) surface area of 700 m2 g–1 has been designed and synthesized through solvothermal self-assembling porphyrin catechol...
Article
A novel highly ordered network based on shed snakeskin has been employed as a sustainable/natural template, to fabricate efficient heterogeneous cobalt composite as catalyst by a nano-casting process. Characterization of the Cobalt nano-catalyst was investigated by several analysis methods including TEM, FESEM-EDS mapping, XRD, XPS, TGA, ICP, Raman...
Article
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Deep eutectic solvents (DESs) (ZnCl 2 and urea) have been used to solubilize organic matter from sewage sludge (SS), followed by subsequent hydrothermal carbonization (HTC) to obtain low-nitrogen-content hydrochar. The nitrogen content in hydrochar obtained after DES addition decreased to 1.93 from 3.15% (no DES) at 210°C. DES can notably dissolve...
Article
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The fundamental relationship between structure and properties, which is called ‘structure-property’, plays a vital role in the rational designing of high-performance catalysts for diverse electrocatalytic applications. Low-dimensional (LD) nanomaterials, including 0D, 1D, 2D materials, combined with low-nuclearity metal atoms, ranging from single a...
Article
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Low dimensional electrocatalytic heterostructures have recently attracted significant attention in the catalysis community due to their highly tuneable interfaces and exciting electronic features, opening new possibilities for an effective nanometric control of both charge carriers and energetic states of several intermediate catalytic species. In-...
Article
The large availability and renewable nature of lignin makes its upgrading to bioproducts of particular interest for sustainable development. The hydrodeoxygenation (HDO) of anisole specifically represents a model reaction for the conversion of lignin to biofuels through the removal of the aromatic carbon‐oxygen bonds. To date, a range of Ni‐based c...
Article
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This study was undertaken to report the swift, facile and convenient synthesis of novel hydrazones obtained by condensation reaction between 2-Amino-3-formylchromone and hydrazine derivatives. Various characterization techniques such as MALDI Mass, FTIR, 1HNMR and 13CNMR spectrum analysis was done to determine the chemical structure of these novel...
Book
Heterogeneous catalysis is one of the pillars of chemical and energy industries. As research on this important topic advances, heterogeneous catalysis will be a central science in driving the transition to their eventual carbon neutral operation due to the ease of separation and reusability. Readers interested in understanding the basics as well as...
Article
Nutrient resources make up a significant portion of wastes from all around the world. According to several recent studies, nuts and their residues are regarded as valuable natural resources for nutrition and other applications. The presence of waste nut residues in nature may lead to environmental problems. The use of this waste for various applica...
Article
The present contribution explores alternative catalysts for a more practical biomass conversion and valorisation, in particular, iron carbide (with and without the presence of metallic iron) and iron manganese carbide-based nanocomposites were tested for the first time as catalysts toward the sustainable production of vanillin. The catalysts are cr...
Article
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In this study, 1,8-dioxo-octahydroxanthenes were prepared employing a simple, effective and environmentally sound approach utilizing an iron oxide nanocatalyst under solventless conditions. The proposed iron oxide nanomaterial exhibited high product yields, short reaction times and a facile work-up procedure. The synthesized catalyst was also found...
Article
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Multi-step organic syntheses of various drugs, active pharmaceutical ingredients, other pharmaceutically and agriculturally important compounds have already been reported using flow synthesis. Compared to batch, hazardous and reactive reagents can be handled safely in flow. This review discusses the pros and cons of flow chemistry in today’s scenar...
Article
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Glycerol and aminophenol intermolecular condensation has been investigated through a milling and microwave-assisted sequential strategy, towards the synthesis of a benzoxaxine derivative. Mechanochemical activation prior to the microwave-assisted process could improve the probability of contact between the reagents, and greatly favors the higher co...
Article
Quinoxalines and their derivatives are of great value in the chemical and biological sciences. These compounds are found in dyes, agrochemicals, and are used as building blocks of drugs for the treatment of different diseases. Quinoxalines and their derivatives are synthesized by a heterogeneous catalysis procedure that involves the condensation of...
Article
Co3O4 was synthesized in the presence of 3D porous nanostructured SiO2/carbon composite derived from rice husk via a hydrothermal method to produce Co3O4@SiO2/C nanostructures with good microstructural, morphological and excelling catalytic properties. The morphology and textural properties of the products were tuned by using different amounts of h...
Article
Pyrolysis is an efficient method for converting this potential environmental contaminant into bio-oil or other products that have specific applications. Recent pyrolysis processes developed to valorize different types of waste, associated with catalytic deoxygenation, was the focus of this review article. The different protocols studied and adopted...
Article
A novel-Pd/CuO-Ni(OH)2/C catalyst with carbon black as support was successfully synthesized by hydrazine hydrate reduction and galvanic replacement strategies, subsequently tested for activity in the electrocatalytic oxidation of ethanol. The...
Article
The selective transformation of biomass-derived platform chemicals into high-value chemicals has become one of the important topics of current research as the current chemical economy is shifting towards the increasing...
Article
Reversible rearrangements have been studied. UV induced conversion of 1-phenyl-3a-R2-3,3а,8,8а-tetrahydro-3,8-(epiminomethano)cyclopenta[a]indene-2-carboxylates and -ethanones (i.e., cyclopentenes) leads to 4a-phenyl-4b-R2-1,2,4a,4b,8b,8c-hexahydro-2-azabenzo[a]cyclopropa[cd]azulene-4-carboxylates and -ethanones (i.e., vinylcyclopropanes). The reve...
Article
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Halide perovskite materials (HPM) have been recently employed as photocatalysts in H2 generation, CO2 reduction and organic synthesis. However, the high toxicity of lead is directing research to Pb-free halide...
Article
Direct methanol and ethanol fuel cells are an important component of the development and application of contemporary emerging energy. However, most electrocatalysts used in the methanol oxidation reaction (MOR), ethanol...
Preprint
Full-text available
The highly efficient cycloaddition reaction of hydrazonyl chlorides with 2,3-dichloro-1,4-naphthoquinone yielded pharmaceutically important spiro-naphthalene-1,2'-[1,3,4]oxadiazol-4-ones with moderate to good yields under batch and flow synthesis methods. The obtained products were elucidated by IR, ¹ H NMR, ¹³ C NMR, HRMS and single crystal X-ray...
Article
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The synthesis of esters is one of the most fundamental and significant subjects in organic chemistry and chemical industry because they are used in high-value products such as cosmetics, biofuel, pharmaceuticals, surfactants, and food ingredients. In this study, an efficient, economic, sustainable, and green protocol for oxidative esterification re...
Article
Herrin, a simple and eco-friendly method for the synthesis of silver nanowires (Ag-NWs) has been reported. Silver nanowires were synthesized using Psidium guajava seed extract that acted as a reducing agent as well as a stabilizing agent for silver nitrate solution. Synthesis was carried out at 50 °C temperature under continuous UV-irradiation. Sil...
Article
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In this work, a simple hydrothermal method was employed to prepare a pristine sample of copper oxide (CuO) and three samples of copper oxide–graphene nanocomposites (CuO-xG) with x = 2.5, 5, and 10 mg of graphene. The synthesized samples were characterized using X-ray powder diffractometry (XRD), field emission scanning electron microscopy (FESEM),...
Article
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Atomic catalysts (AC) are gaining extensive research interest as the most active new frontier in heterogeneous catalysis due to their unique electronic structures and maximum atom-utilization efficiencies. Among all the atom catalysts, atomically dispersed heteronuclear dual-atom catalysts (HDACs), which are featured with asymmetric active sites, h...
Article
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A perspective on the use of heterogeneous catalysis to drive the waste-to-pharma concept is provided in this contribution based on the conversion of furanics to active pharmaceutical ingredients (APIs). The provided overview of the concept in this perspective article has been exemplified for two key molecule examples: Ancarolol and Furosemide.
Article
A highly ordered organic-inorganic hybrid nanomaterial containing copper N-heterocyclic carbene complex ([email protected]) was synthesized and characterized using various techniques including FTIR, MAS NMR, XRD, TGA, SEM, and TEM. [email protected] nanomaterial is highly efficient heterogeneous system towards the selective oxidation of primary and...
Article
A mesoporous metal-organic framework with photothermal properties, namely PCN-222, was solvothermally synthesized from meso-tetra(4-carboxyphenyl)porphyrin and zirconium chloride employing both benzoic acid (BA) and trifluoroacetic acid (TFA) as modifiers. The MOF material subsequently served as a porous support for a polyoxometalate (POM), H3PW12O...
Article
A periodic mesoporous organosilica material functionalized with a bis-NHC palladium pincer complex was synthesized by sol-gel process. The resulting organic-inorganic hybrid nano material was characterized by XRD, TEM, SEM, TGA analysis, and BET measurements. The hybrid nanomaterial act as highly active catalysts for the Suzuki–Miyaura cross-coupli...
Article
A Brönsted acidic ionic solid comrising tungstate-functionaized polyorganosiloxane framework (PMO-IL-WO4²⁻) efficiently catalysed aerobic oxidation of sulfides in aqueous medium. The catalyst can selectively produce sulfoxides or sulfones by running the reaction at room temperature or 50 °C, respectively. Because of the ionic liquid-based charged s...
Article
The interest in the removal of emerging contaminants has increased in the last decade. Photocatalytic degradation using p-n heterojunctions could effectively provide the degradation of these type of substances that are persistent in the environment. In this work, the synthesis, characterization, and photocatalytic evaluation of TiO2–F as well as Cu...
Article
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SBA-Pr-Is-TAP was synthesized via functionalization of SBA-15. The synthesized hybrid nanomaterial was characterized by various techniques including FT-IR, TGA, XRD, SEM, and BET. SBA-Pr-Is-TAP could precisely bind Fe3+ and Cr2O72− ions among a range of different species in aqueous media, consequently acting as a nanoporous chemosensor of Fe3+ and...
Article
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NiO was synthesized in the presence of a 3D porous nanostructured SiO 2 /carbon composite derived from rice husk via a hydrothermal method to produce NiO@SiO 2 /C nanostructures with good microstructural and morphological properties and high catalytic activity. Textural properties and physicochemical characteristics of the materials could be modifi...
Article
The aim of this tutorial review is to provide a general overview of processes, technologies and challenges in the production of pharmaceutical and bioactive compounds from food waste and lignocellulosic residues. Particular attention is given to benign-by-design processes instinctively devoted to environmental sustainability for the recovery of bio...
Article
Mono- and bimetallic nanoparticles (NPs) supported on carbon nanotubes (CNTs) (Ni/CNTs, Co/CNTs and NiCo/CNTs) were synthesized at room temperature (RT) via hydrazine hydrate reduction method without any surfactant. The galvanic replacement reaction was exploited to prepare Rh/Ni/CNTs, Rh/Co/CNTs and Rh/NiCo/CNTs supported nanocatalysts. Prepared n...
Article
Petroleum-based plastics (such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, etc.) as white waste have caused great concern in the environment. It is urgent to develop a kind of biodegradable, biocompatible and non-toxic materials to replace them. Herein, an environmental-friendly edible film for postharvest fruits refreshing app...
Chapter
In this chapter we discuss the possibility of using biomass as reagents for the synthesis of biologically active compounds. The selected examples only scratch the surface on the volume of research being carried out on the topics, but are significant of its strengths and challenges. As is delineated below, the data collected so far offers significan...
Cover Page
Full-text available
MINIREVIEW Anand S. Burange, Rafael Luque et al. Electrophilicity in heterogeneous catalysis: role of surface and sub-surface modification
Article
Bimetallic Pd-Ni catalysts were prepared via impregnation method, with effects of Pd/Ni ratio (wt%) on their catalytic performance for the oxidation of cyclohexane with molecular oxygen being investigated. Synthesized catalysts were characterized by a series of techniques including XRD, Nitrogen adsorption-desorption, H2-TPR, XPS, ICP-AES, TEM, SEM...
Chapter
One of the biggest turning points in the chemical industry was the advent of catalytic cracking in the nineteenth century for the refining of fossil resources. Biomass valorization and more sustainable practices are important steps for overturning the “disposable society” mindset where resources are viewed as infinite, cheap, and harmless. Biomass...
Article
The current needs of finding more efficient materials with tunable properties have serve as a motivation for the scientific community to move towards nature-inspired hierarchical materials adhering to the green analytical chemistry (GAC) principles, also due to the high complexity and efficiency of systems in nature. Such type of materials have exh...
Article
Full-text available
Heterogeneous photocatalysis is a subtype of catalysis that refers to chemical processes catalysed by a semiconductor solid under proper illumination conditions [...]
Article
Transformation of biomass to chemicals and fuels is a long-term goal in both science and industry. However, high cost is one of the major obstacles to the industrialization of this sustainable technology. Thus, developing catalysts with high activity and low-cost is of great importance for biomass conversion. The last two decades have witnessed the...
Article
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Modern life is currently based on the consumption of energy and chemicals coming from fossil fuels, mainly produced by the petrochemical industry [...]
Article
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Copper is currently the most active monometallic catalyst to generate hydrocarbon and oxygenated products, while the huge kinetic barrier for the formation of C-C bond on the path toward the formation of C2+ products has remained unsolved to date. In this work, inspired by the successfully growing 2D borophene on Cu (111) surfaces [Nat. Nanotech. 2...
Article
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Whey in large quantities can cause environmental problems when discarded, because it reduces dissolved oxygen and aquatic life. Nonetheless, it could be used as an easily available and economical alternative to reduce culture medium costs in microbially induced calcium carbonate precipitation (MICP). In this work, a native Sporosarcina pasteurii wa...
Article
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Biomass-derived materials are put forward as eco-friendly alternatives to design heterogeneous catalysts. To contribute in this field, we explored the potential of mesoporous biogenic silica (RH-Silica) obtained from lignocellulosic waste, in particular from rice husk, as an inorganic support to prepare heterogenized iron oxide-based catalysts. Mec...
Article
Three-dimensional (3D) carbon from the assembly of low-dimensionally isolated segments have attracted much attention as these carbon materials not only inherit the superiorities of individual building blocks but also acquire new synergic effects. However, it remains a big issue to assemble isolated carbon segments into a 3D carbon superstructure by...
Article
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Magnetically recoverable nano-catalysts can be readily separated from the reaction medium using an external magnet. In recent years, chemistry researchers have employed them as catalysts in chemical reactions. The high surface area, simple preparation, and modification are among their major advantages. Pyridine derivatives are an important category...
Article
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In this work, we report the incorporation of nickel oxide nanoparticles into a metal–organic framework (MOF) structure by a solvent-free mechanochemical strategy. In particular, the zirconium-based MOF UiO-66 was modified with different Ni loadings and characterized using complementary techniques including X-ray diffraction (XRD), N2 porosimetry an...
Article
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A highly sustainable method for the preparation of supported iron oxide and copper nanoparticles (NPs) on a biomass-derived carbon by solvent-free mechanochemical process is reported. In-situ mechanochemically obtained extracts from orange peel could behave as a green reducing agent, allowing the formation of Cu metal nanoparticles as well as gener...
Article
Supported metal nanoparticles (Cu, W, Mo among others) have been stabilized on a silica matrix following an efficient and sustainable one-pot microwave-assisted protocol. The materials synthesized were characterized, mainly, by nitrogen adsorption desorption measurements, X-ray diffraction (XRD), scanning electron microscopy/energy dispersive X-ray...
Article
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Clean water is one of the sustainable development goals set by the United Nations for 2030. The development of effective but worldwide affordable strategies is essential to guarantee this achievement. Photocatalysis technology fulfills these criteria whenever the photocatalyst is sustainable and nontoxic. In this article, a cellulose-paper modified...
Chapter
This chapter compiles the main biofuels produced from lignocellulosic biomass. It discusses their physicochemical properties and the catalysts employed in their production. The lignocellulosic biomass is mainly composed of polymeric carbohydrates (cellulose and hemicellulose) and aromatic polymer lignin with smaller amounts of pectin, proteins, and...