Article
Chemistry, Multidisciplinary
Debojyoti Roy, Sunandita Paul, Jyotishman Dasgupta
Summary: Developing methods that directly activate C-H bonds with high selectivity for C-C bond formation in complex organic synthesis has been a significant chemistry challenge. Recent research has demonstrated that photoactivation of weakly polarized C-H bonds can be achieved inside a cationic water-soluble nanocage using visible light-mediated host-guest charge transfer (CT) chemistry. By utilizing this novel photoredox activation mechanism, the formation of 1,3-diynes from terminal aromatic alkynes has been successfully achieved at room temperature in water. The generation of cage-confined alkyne radical cations and proton-removed neutral radical species highlights the unique C-C coupling step driven by supramolecular preorganization. A method for light-activated Glaser coupling in water is reported, which utilizes visible light to trigger host-guest photoredox chemistry. The C-C coupling step is facilitated by cage-confined neutral radicals through substrate preorganization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Man-Hua Ding, Juan Liao, Lin-Li Tang, Guang-Chuan Ou, Fei Zeng
Summary: The novel water-soluble macrocycle with two pyridinium moieties can selectively encapsulate naphthalene to form a 1:1 complex over a variety of polycyclic aromatic hydrocarbons.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Arkadiusz Marek Sakowicz, Agnieszka Szumna
Summary: This study presents the synthesis of new chiral water-soluble dimeric capsules using the multicomponent Mannich reaction and subsequent self-assembly. These capsules are capable of effectively encapsulating a variety of chiral molecules with mixed polar/apolar characters. The formation of heterocapsules using additional interactions between charged acidic and basic side chains leads to improved encapsulation properties.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Jaemin Kim, Jewon Choi, Kiho Park, Sungchan Kim, Kwan Woo Nam, Kookheon Char, Jang Wook Choi
Summary: Increasing the silicon content in the silicon-graphite composite anode to maximize the energy density of a lithium-ion battery cell is a challenging task due to the contradictory surface characteristics of silicon and graphite. This study presents an amphiphilic host-guest complex binder composed of pyrene-conjugated poly(acrylic acid) and a hyperbranched gamma-cyclodextrin polymer, which effectively maintains the integrity of the electrode and improves the cycling performance and rate capability of Si-Gr electrodes.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zoe L. Sinclair, Nicola L. Bell, Jessica. R. R. Bame, De-Liang Long, Leroy Cronin
Summary: Polyoxopalladates (POPs) are a class of self-assembling palladium-oxide clusters that have different sizes, shapes, and compositions. The largest compound in this family, {Pd-84}(Ac), is an ideal molecule for exploring supramolecular behavior in aqueous media. Through molecular visualization and nuclear magnetic resonance studies, it has been found that {Pd-84}(Ac) forms a 1:7 host-guest complex with benzyl viologen (BV2+) in aqueous solution.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Clement Falaise, Soumaya Khlifi, Pierre Bauduin, Philipp Schmid, William Shepard, Anton A. Ivanov, Maxim N. Sokolov, Michael A. Shestopalov, Pavel A. Abramov, Stephane Cordier, Jerome Marrot, Mohamed Haouas, Emmanuel Cadot
Summary: In this study, the chaotropic effect of reduced molybdate ions in acidified aqueous solution was shown to significantly amplify weak supramolecular interactions, leading to the formation of large aggregates of molybdenum-blue oligomeric species and gamma-cyclodextrin. Time-resolved Small Angle X-ray Scattering (SAXS) analysis revealed the rapid formation of nanoscopic {Mo-154}-based host-guest species, while X-ray diffraction analysis showed the formation of an unprecedented three-component well-ordered core-shell-like motif. This work provides insights into self-assembly processes and offers new opportunities for designing complex multicomponent materials through non-covalent chemistry simplicity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Clement Vigier, Dimitri Fayolle, Hussein El Siblani, Jana Sopkova-de Oliveira Santos, Frederic Fabis, Thomas Cailly, Emmanuelle Dubost
Summary: The addition of a nitrogen atom to the cryptophane core enhances its solubility in organic solvents without changing its conformation. This new type of cryptophane has the potential for wide functionalization and shows promise in Xe-129 magnetic resonance imaging (MRI) applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Luisa Koch, Alina Guntermann, Katharina Hirschbichler, Carmen Plass, Tobias Betke, Ling Ma, Thomas Kilthau, Harald Groeger
Summary: Achieving a circular economy in a short term is a current research focus and a global challenge. Meeting the criteria of biorenewability and biodegradability is essential for industrial products, particularly in the chemical industry. This study demonstrates the rational design and experimental development of a new generation of bio-based lubricant materials, which fulfill the criteria of changed raw material basis, biodegradability, tailor-made fine-tuning of performance properties, and economically favorable production using efficient and sustainable catalytic technologies. These new lubricant products are produced cost-effectively and sustainably through hydroformylation and hydrogenation, followed by enzymatic esterification, allowing for tailor-made blending.
Article
Chemistry, Multidisciplinary
Jie Shen, Arundhati Roy, Himanshu Joshi, Laxmicharan Samineni, Ruijuan Ye, Yu-Ming Tu, Woochul Song, Matthew Skiles, Manish Kumar, Aleksei Aksimentiev, Huaqiang Zeng
Summary: In this study, we report a novel class of fluorofoldamer-based artificial water channels that have excellent water transport rate and selectivity, as well as structural simplicity and robustness. The best-performing channel is a decorated foldamer nanotube, which exhibits an ultrafast water conduction rate and can exclude salts and protons. The inwardly facing C(sp2)-F atoms in the channel are proposed to be critical for enabling the ultrafast and superselective water transport properties.
Article
Biochemistry & Molecular Biology
Israel Gonzalez-Mendez, Kendra Sorroza-Martinez, Ignacio Gonzalez-Sanchez, Jesus Gracia-Mora, Maria Josefa Bernad-Bernad, Marco Cerbon, Ernesto Rivera, Anatoly K. Yatsimirsky
Summary: A new family of EDTA-β-CD dendrimers were synthesized using click-chemistry conjugation, and their structure, self-inclusion process, and interaction with other substances were studied. The results showed that these novel platforms, different from traditional PAMAM-β-CD dendrimers, had excellent water solubility, no toxicity, and promising potential as drug delivery carriers.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Xianyin Dai, Lu Tian, Zhixue Liu, Wenshi Xu, Yu-Ping Liu, Yu Liu
Summary: This study reports an efficient transition metal-free electrocatalytic nitrate reduction reaction for ammonia synthesis using purely organic macrocyclic compounds, cyclodextrins, as catalysts. The parent gamma-cyclodextrin exhibited uncommon catalytic performance with a relatively higher ammonia yield. The K+-mediated 3D gamma-cyclodextrin-K+ frameworks greatly enhanced the enrichment effect of nitrate and promoted mass transfer, leading to efficient nitrate reduction under alkaline conditions.
Article
Chemistry, Multidisciplinary
Irene Regeni, Rituparno Chowdhury, Kai Terlinden, Shinnosuke Horiuchi, Julian J. J. Holstein, Sascha Feldmann, Guido H. H. Clever
Summary: This article introduces a strategy to engineer the stacking of diketopyrrolopyrrole (DPP) dyes based on non-statistical metallosupramolecular self-assembly. Different discrete assemblies can be formed by adding Pd(II) to the DPP backbone equipped with nitrogen-based donors, distinguished by the number of π-stacked chromophores. We obtained and systematically investigated a Pd3L6 three-ring, a heteroleptic Pd2L2L’2 ravel composed of two crossing DPPs (flanked by two carbazoles), and two unprecedented self-penetrated motifs (a Pd2L3 triple and a Pd2L4 quadruple stack). With increasing counts of stacked chromophores, UV/Vis absorptions red-shift and emission intensities decrease, except for compound Pd2L2L’2, which has an exceptional photoluminescence quantum yield of 51% explainable by an intra-assembly FRET process. The modular design and synthesis of soluble multi-chromophore building blocks offer potential for the preparation of nanodevices and materials with applications in sensing, photo-redox catalysis, and optics.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Carolina Belenguer-Sapina, Enric Pellicer-Castell, Adela R. Mauri-Aucejo, Ernesto Francisco Simo-Alfonso, Pedro Amoros
Summary: Cyclodextrins, known for their host-guest chemistry and low environmental impact, are widely used in pharmaceutical and food industries. However, their high solubility in water hampers their use for extraction purposes, which is being addressed through materials science research. Novel solid sorbents with cyclodextrins show promise for improved properties in pollutant adsorption. This systematic review highlights significant uses of cyclodextrins in adsorbing pollutants for both quantitation and remediation.
Article
Chemistry, Multidisciplinary
Yanbang Li, Rohin Biswas, William P. Kopcha, Thierry Dubroca, Laura Abella, Yue Sun, Ryan A. Crichton, Christopher Rathnam, Letao Yang, Yao-Wen Yeh, Krishnendu Kundu, Antonio Rodriguez-Fortea, Josep M. Poblet, Ki-Bum Lee, Stephen Hill, Jianyuan Zhang
Summary: We report the synthesis of a three-buckyball metal complex (MBT) as a modular platform to develop water-soluble EMF derivatives. The resulting water-soluble MBTs show excellent biocompatibility and have potential applications in biomedical fields. The Gd MBTs exhibit superior T-1 relaxivity, while the Lu MBTs show promise as photosensitizers. We anticipate that the modular nature of the MBT platform will enable the development of bio-specific REE drugs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Jia-Fu Yin, Lucia Amidani, Jiadong Chen, Mu Li, Binghui Xue, Yuyan Lai, Kristina Kvashnina, May Nyman, Panchao Yin
Summary: This Review discusses the use of X-ray, neutron scattering and X-ray absorption to characterize the assembly and function of inorganic nanostructured materials in solution. The review covers various size regimes and techniques including SAXS/WAXS/SANS, PDF, and XANES/EXAFS. The goal is to provide information and inspiration for the inorganic/materials science communities in understanding the role of solution speciation in natural and synthetic processes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Francesca Telesio, Matteo Carrega, Giulio Cappelli, Andrea Iorio, Alessandro Crippa, Elia Strambini, Francesco Giazotto, Manuel Serrano-Ruiz, Maurizio Peruzzini, Stefan Heun
Summary: We demonstrate evidence of Josephson coupling in a planar few-layer black phosphorus junction, confirming its existence and characteristics. These findings will accelerate further research on the unique properties of exfoliated black phosphorus thin flakes.
Article
Chemistry, Multidisciplinary
Dennis Larsen, Michel Ferreira, Sebastien Tilloy, Eric Monflier, Sophie R. Beeren
Summary: This study utilizes a native cyclodextrin glucanotransferase (CGTase) to drive the dynamic system of cyclodextrins (CDs), incorporating unnatural glucopyranose-derived building blocks. By controlling the relative concentrations of modified glucopyranoses, modified CDs can be accessed.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Abdelghani El Mouat, Chryslain Becquet, Jeremy Ternel, Michel Ferreira, Herve Bricout, Eric Monflier, Mohammed Lahcini, Sebastien Tilloy
Summary: This study reports the reductive hydroformylation of methyl 10-undecenoate in a biphasic liquid/liquid system. Under optimized conditions, the use of a specific ionic liquid immobilized rhodium/amine catalytic system allows for high yield of primary alcohols, which can be recycled.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
D. N. Gorbunov, M. V. Nenasheva, M. V. Terenina, Yu. S. Kardasheva, E. R. Naranov, A. L. Bugaev, A. V. Soldatov, A. L. Maximov, S. Tilloy, E. Monflier, E. A. Karakhanov
Summary: This review focuses on the progress made in the design of N-ligands for homogeneous and biphasic hydroformylation, as well as the data on important tandem reactions in hydroformylation.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Multidisciplinary
Antonio Madureira, Sebastien Noel, Bastien Leger, Anne Ponchel, Eric Monflier
Summary: The hydrogenation of vegetable oil-derived compounds using ion-exchange resin-supported ruthenium nanoparticles has been achieved for the first time. These catalysts show high efficiency, low metal loading, and excellent recyclability, and exhibit remarkable catalytic activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Walid Hamza Saadaoui, Cecile Machut, Sebastien Rio, Sandra Bigot, Vincent Wiatz, Eric Monflier, Anne Ponchel
Summary: The direct conversion of glucose to 5-hydroxymethylfurfural was investigated using phosphated niobium oxide-carbon catalysts in a biphasic system. A facile approach for generating Nb-based composites with high metal loadings (around 20%) was developed through hydrothermal carbonization, calcination, and H3PO4 adsorption. Catalysts were characterized through various techniques, and NbP@C-RB30 and NbP@C-RB15 prepared using oligosaccharides and low water volumes exhibited higher efficiency for HMF production.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Applied
Abdelghani El Mouat, Taha El Assimi, Mustapha Raihane, Jeremy Ternel, Herve Beicout, Eric Monflier, Sebastien Tilloy, Mohammed Lahcini
Summary: In this study, hyperbranched poly(epsilon-caprolactones) were synthesized and used as coating materials for slow-release DAP fertilizer. The prepared polymers (SFO-O-g-PCL) were confirmed by NMR and FTIR analysis. The coated DAP fertilizer granules showed a significant decrease in the release of P2O5 compared to the uncoated DAP fertilizer. This research opens up possibilities for the production of biodegradable coating agents using hydrophobic polyesters and bio-based oils.
PROGRESS IN ORGANIC COATINGS
(2023)
Editorial Material
Multidisciplinary Sciences
Anne Ponchel, Eric Monflier
Summary: This article comments on a recent study on the selective recovery of gold through a hierarchical host-guest assembly specifically built from beta-CD.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Sylwia Kostera, Stefan Weber, Ines Blaha, Maurizio Peruzzini, Karl Kirchner, Luca Gonsalvi
Summary: Well-defined, bench-stable Mn(I) non-pincer-type complexes were used as catalysts for the selective reduction of CO2 to boryl-protected MeOH in the presence of pinacolborane (HBpin). High yields were achieved under mild reaction conditions without the need for base or additives, using the alkylcarbonyl Mn(I) bis(phosphine) complexes fac-[Mn(CH2CH2CH3)(dippe)(CO)3] [Mn1, dippe = 1,2-bis(diisopropylphosphino)ethane] and [Mn(dippe)(CO)2{(mu-H)2(Bpin)}] (Mn4) as precatalysts. Mechanistic insights were obtained through NMR experiments and monitoring of the catalytic reactions.
Article
Chemistry, Multidisciplinary
Sylwia Kostera, Gabriele Manca, Luca Gonsalvi
Summary: Catalytic hydrogenation of CO2 to formate was achieved using the neutral, halide-free, coordinatively saturated tris(carbonyl) manganese pincer-type complex [Mn(PNP)(CO)(3)] as catalyst, DBU as base, and LiOTf as Lewis acid additive. The reaction conditions were mild (60 bar, 80°C). DFT calculations revealed that the activation of the precatalyst occurred through intermolecular, base-assisted dihydrogen heterolytic splitting.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Engineering, Environmental
Dario Lacalamita, Guillaume Hoyez, Chiara Mongiovi, Anne Ponchel, Nadia Morin-Crini, Cyril Rousseau, Christophe Loup, Jolanta Rousseau, Marina Raschetti, Eric Monflier, Vincent Placet, Gregorio Crini
Summary: In recent years, there have been numerous studies on the use of metal organic frameworks (MOFs) to remove contaminants from aqueous solutions. However, little is known about using MOFs as adsorbents for the removal of fluoride ions from real effluents. In this study, a highly porous MOF, UiO-66-NH2, was used for the final treatment of complex discharge waters containing fluoride ions. The batch experiments showed that the MOF exhibited high adsorption capacities for fluoride ions, effectively reducing their concentrations in the effluent.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Thomas Roth, Rebecca Evertz, Niklas Kopplin, Sebastien Tilloy, Eric Monflier, Dieter Vogt, Thomas Seidensticker
Summary: Aqueous hydroaminomethylation (HAM) is a Green process for the efficient production of amines from basic chemicals. In this study, a continuous process for HAM in an aqueous multiphase system was successfully established. By adding randomly methylated-beta-cyclodextrin as a mass transfer agent, high yields and selectivities were achieved in several continuous experiments. The addition of cyclodextrin made it unnecessary to use solvents.
Article
Materials Science, Multidisciplinary
F. Telesio, F. Mezzadri, M. Serrano-Ruiz, M. Peruzzini, F. Bisio, S. Heun, F. Fabbri
Summary: This study demonstrated the transportation of visible light in nanometric niobium stripes coupled with a dielectric polymeric layer and utilizing the remotely-excited/detected Raman signal of black phosphorus as a probe. The light transport mechanism is attributed to the generation of surface plasmon polaritons at the Nb/polymer interface.
MATERIALS FOR QUANTUM TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Chryslain Becquet, Michel Ferreira, Herve Bricout, Baptiste Quienne, Sylvain Caillol, Eric Monflier, Sebastien Tilloy
Summary: Jojoba oil ester was functionalized with alcohol groups via hydrohydroxymethylation catalyzed by a Rh/amine system. Under optimized conditions, a full conversion and a 99% yield of alcohol products were achieved. The catalytic system could be recycled at least 10 times without significant loss of activity. The hydrohydroxymethylated products were successfully used as monomers for the synthesis of a new biobased polyurethane with good thermal and mechanical properties.
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)
