Article
Chemistry, Physical
Masoud Tavanarad, Mehran Rezaei, Fereshteh Meshkani
Summary: Catalysts with Ni supported on alkaline-earth oxides-promoted Al2O3 showed enhanced catalytic activity and stability in glycerol dry reforming reaction for hydrogen and carbon monoxide production. Adding various alkaline-earth oxides decreased Ni crystalline size and improved catalytic performance of the catalyst. Promoted catalysts, especially with SrO, exhibited superior stability during continuous operation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Nikolas Kiraly, Dominika Capkova, Robert Gyepes, Nikola Vargova, Tomas Kazda, Jozef Bednarcik, Daria Yudina, Tomas Zelenka, Pavel Cudek, Vladimir Zelenak, Anshu Sharma, Vera Meynen, Virginie Hornebecq, Andrea Strakova Fedorkova, Miroslav Almasi
Summary: Two new alkaline earth metal-organic frameworks, UPJS-15 and UPJS-16, were synthesized and characterized. UPJS-15 exhibited one-dimensional channels with a size of approximately 11 x 10 angstrom(2) and showed high adsorption capacity for CO2. UPJS-16, on the other hand, did not show significant adsorption for the tested gases.
Article
Chemistry, Physical
Gonzalo Valdebenito, Marco Gonzalez-Carvajal, Luis Santibanez, Patricio Cancino
Summary: This review focuses on the development of metal-organic frameworks (MOFs) as catalysts for converting carbon dioxide and biomass into short-chain hydrocarbons and clean energies. MOFs have been used as catalyst supports or sacrificial templates, yielding interesting results in the hydrogenation or oxidation of biomass. The acidity of MOFs, metal nodes, surface area, and dispersion of active sites are important factors affecting the catalyst performance, which will be discussed in this review.
Article
Chemistry, Physical
David Mendez-Mateos, V. Laura Barrio, Jesus M. Requies, Jose F. Cambra
Summary: This study investigates the effects of adding alkaline earth metals and lanthanides on the conversion of CO2 to methane in catalysts. The inclusion of La improves methane yield and enhances resistance to H2S deactivation.
Article
Nanoscience & Nanotechnology
Zhilin Wen, Haifeng Lv, Xiaojun Wu
Summary: By anchoring alkaline-earth metal (AEM) on nitrogen-doped graphene nanoribbons, stable alkaline-earth-metal based single-atom catalysts (SACs) with excellent electrocatalytic nitrogen reduction reaction (NRR) performance were proposed. The activation degree of N2 and NRR activity were found to be linearly associated with the charge states of AEMs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Thermodynamics
Xiangyu Fan, Yang Liu, Mingdeng Wang, Chao Li, Yajie Zheng, Yang Liu, Xiangyun Zhong, Guozhong Xu, Yaru Zhang, Yifei Feng, Bin Bai, Jinfeng Bai
Summary: The influence of alkali metals and alkaline earth metals on coke reactivity and coke microstructure was studied, and high-reactivity metallurgical cokes were produced using the mechanical mixing method. The gasification kinetics of coke samples were further investigated to understand the catalytic mechanism of alkali metals and alkaline earth metals on cokes, providing a basis and guidance for hydrogen-rich blast furnace charge production. The addition of alkali metals or alkaline earth metals significantly increased the chemical reactivity index of cokes. Furthermore, it was observed that the microstructure of cokes changed after the addition, with increased contact area and reduced disorder, leading to increased reactivity.
Article
Energy & Fuels
Ming-Xiu Xiao, Guo-Cui Mao, Jin-Peng Wang, Zhan-Kuo Guo, Bao-Xia Dong, Yun-Lei Teng
Summary: Producing clean fuel from shell wastes (eggshell and clamshell) can solve the issue of food waste and address the energy shortage. The study investigated the hydrogenation of eggshell and clamshell using mechanochemical methods at room temperature. The results showed that alkaline earth metals, especially calcium, were effective catalysts for the hydrogenation process, resulting in methane yields of 45.04% and 33.30% for clamshell and eggshell, respectively, with 100% selectivity for CH4. By doping with ruthenium, the methane yield was further improved to 52.62% and 54.76% for clamshell and eggshell. The milling time, rotating speed, hydrogen pressure, and the type of doped transition metals all had an influence on the calcium-assisted methanation of shell wastes. This study presents an alternative method to utilize shell wastes and produce clean CH4 fuel at room temperature.
Article
Energy & Fuels
Hongfang Ma, Yi Yang, Haoyue Fu, Haitao Zhang, Weixin Qian, Qiwen Sun, Weiyong Ying
Summary: This study explored the synthesis of light olefins through high-temperature Fischer-Tropsch synthesis using alkaline-earth metals modified FeMn catalysts. It was found that the interaction of Ca, Sr, and Ba improved CO dissociative adsorption and reduced H species adsorption, enhancing CO conversion and C-2(=)-C-4(=) selectivity. The FeMnSrNa catalyst exhibited the best FTS performance due to its highest surface basicity, strongest CO dissociative adsorption, and highest active iron carbide content.
Article
Chemistry, Multidisciplinary
Claudia E. Berdugo-Diaz, Melissa T. Manetsch, Yang Sik Yun, Jieun Lee, Jing Luo, Xue Chen, David W. Flaherty
Summary: Esters can be reduced to ethers and alcohols through C-O bond cleavage by hydrogenation and hydrogenolysis pathways on Bronsted acidic faujasite (M-FAU) supported metal nanoparticles. The rates and selectivities of each pathway are influenced by the metal identity (M=Co, Ni, Cu, Ru, Rh, Pd, and Pt). Pt-FAU catalyst exhibits propyl acetate consumption rates up to 100 times higher than other M-FAU catalysts and achieves a 34% selectivity for ethyl propyl ether. The reduction of esters appears to involve a bifunctional mechanism, with stepwise addition of H* atoms to the carbonyl to form hemiacetals on the metal sites, followed by hemiacetal diffusion to Bronsted acid sites for dehydration to ethers or decomposition to alcohol and aldehyde. The reduction rates of propyl acetate seem to be determined by H* addition to the carbonyl and C-O cleavage of hemiacetal.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Jie He, Na Li, Zhi-Gang Li, Ming Zhong, Zi-Xuan Fu, Ming Liu, Jia-Cheng Yin, Zhurui Shen, Wei Li, Jijie Zhang, Ze Chang, Xian-He Bu
Summary: A versatile synthetic strategy was demonstrated to generate transition metal single-atom catalysts (M SAs/NC, M = Co, Cu, Mn) through defect engineering of metal-organic frameworks. By deliberately introducing structural defects within the MOF framework, the interatomic distance between metal sites was increased, inhibiting metal aggregation and resulting in a 70% increase in single metal atom yield. The optimized Co SAs/NC-800 showed superior activity and reusability for the selective hydrogenation of nitroarenes, surpassing several state-of-art non-noble-metal catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Applied
Ruiqi Fang, Liyu Chen, Zirong Shen, Yingwei Li
Summary: By utilizing hierarchical porous H-UiO-66 as a support, a series of transition-metal catalysts were synthesized for efficient conversion of furfural to furfuryl alcohol. The unique nanoarchitecture of the catalyst resulted in low mass diffusion resistance, high accessibility of metal active sites, and high durability in the liquid phase reaction, achieving nearly quantitative yield of furfuryl alcohol within 3 hours.
Article
Chemistry, Multidisciplinary
Philipp Stegner, Christian Faerber, Ulrich Zenneck, Christian Knuepfer, Jonathan Eyselein, Michael Wiesinger, Sjoerd Harder
Summary: Ba metal activated by evaporation and cocondensation is a highly active hydrogenation catalyst for various substrates, outperforming molecular catalysts. Two different catalytic cycles are proposed depending on the substrate, with the Ba metal cycle suitable for conjugated alkenes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Ailijiang Abudurusuli, Junben Huang, Peng Wang, Zhihua Yang, Shilie Pan, Junjie Li
Summary: Li4MgGe2S7 is an infrared NLO material with a large band gap and strong nonlinear optical effect, promising a high laser damage threshold and suitable SHG response. It provides insights into the design of new DL compounds with outstanding IR NLO performances.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Multidisciplinary
Tushar Singh, Vaishnavi Atreya, Sachin Jalwal, Aman Anand, Subrata Chakraborty
Summary: Transition metal-catalyzed homogeneous hydrogenation and dehydrogenation reactions using earth-abundant group VI base metals have been extensively studied and have significant implications for sustainable and environmentally friendly organic transformations.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jiehong He, Shaoshuai Chang, Haoran Du, Bo Jiang, Wenzhao Yu, Zhenwu Wang, Weiwei Chu, Lanfang Han, Jian Zhu, Hexing Li
Summary: This study introduces a reliable amorphous NiRu0.1B catalyst with high catalytic activity for the hydrogenation of CO2 into formic acid. The synergistic effect of amorphous structure and electron donation allows this catalyst to exhibit higher activity and stability at low temperatures compared to other catalysts.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Nanoscience & Nanotechnology
Ignacio Romero-Muniz, Carlos Romero-Muniz, Isabel del Castillo-Velilla, Carlo Marini, Sofia Calero, Felix Zamora, Ana E. Platero-Prats
Summary: In this study, we identified the presence of node vacancies within MOF-808 that can be chemically modified using infrared spectroscopy experiments and first-principles calculations. We resolved the atomic structure of single metal sites incorporated into catechol groups postsynthetically using advanced synchrotron characterization tools. Furthermore, we demonstrated the catalytic activity of these modified MOF-808 materials for 1,3-dipolar cycloadditions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Eloy P. Gomez-Oliveira, Nayara Mendez, Marta Iglesias, Enrique Gutierrez-Puebla, Lina M. Aguirre-Diaz, M. Angeles Monge
Summary: In this study, a new BiPF-4 material and its synthesis and catalytic activity were presented. The 2D layers of BiPF-4, formed by Bi7 polyhedra, provide numerous active sites for Lewis acid catalysis. The material exhibits excellent heterogeneous catalytic activity in the multicomponent Strecker reaction.
INORGANIC CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Nerea Landaluce, Maite Perfecto-Irigaray, Jonathan Albo, Garikoitz Beobide, Oscar Castillo, Angel Irabien, Antonio Luque, Alba S. J. Mendez, Ana E. Platero-Prats, Sonia Perez-Yanez
Summary: In this study, doping zirconium based metal-organic frameworks with copper(II) resulted in a homogeneous distribution of the dopant. The doping mechanism was analyzed using chemical analysis, microstructural analysis and synchrotron total scattering data, revealing an improved performance of the doped materials.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Akim Khobotov-Bakishev, Cornelia von Baeckmann, Borja Ortin-Rubio, Laura Hernandez-Lopez, Alba Cortes-Martinez, Jordi Martinez-Esain, Felipe Gandara, Judith Juanhuix, Ana E. Platero-Prats, Jordi Faraudo, Arnau Carne-Sanchez, Daniel Maspoch
Summary: In this study, a new approach based on using prefabricated cavities is proposed to design isoreticular multicomponent MOFs. By using prefabricated cavities and suitable linkers, three- and four-component MOFs can be constructed.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Clara Lopez-Garcia, Stefano Canossa, Joke Hadermann, Giulio Gorni, Freddy E. Oropeza, Victor A. de la Pena O'Shea, Marta Iglesias, M. Angeles Monge, Enrique Gutierrez-Puebla, Felipe Gandara
Summary: A novel synthetic approach is described for the targeted preparation of multivariate metal-organic frameworks (MTV-MOFs) with specific combinations of metal elements, providing more flexibility for the structure of building units by preserving specific metal element combinations during the synthesis process.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Shan Dai, Takashi Kajiwara, Miyuki Ikeda, Ignacio Romero-Muniz, Gilles Patriarche, Ana E. Platero-Prats, Alexandre Vimont, Marco Daturi, Antoine Tissot, Qiang Xu, Christian Serre
Summary: This study successfully encapsulates ultrasmall Cu nanoparticles inside Zr-MOFs to form core-shell composites, which exhibit enhanced reactivity compared to Cu nanoparticles confined in the pores of MOFs. Introducing polar groups on the MOF structure further improves catalytic reactivity and selectivity. Mechanistic investigation reveals the active role of Cu-I sites at the interface between Cu nanoparticles and the support in CO2 photoreduction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Ying Xiong, Tian Tian, Anouk L'Hermitte, Alba S. J. Mendez, David Danaci, Ana E. Platero-Prats, Camille Petit
Summary: Researchers have developed a silver-exchanged zeolite Y as an adsorbent for propylene/propane separation, which exhibits high selectivity, fast kinetics, and reversible sorption. The design strategy of enhancing sorption site affinity and maintaining pore size can be extended to other adsorbents, promoting the deployment of adsorption technology for propylene/propane separation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Antonio Valverde-Gonzalez, Pilar Fernandez-Serinan, Angela Matarin, Avelina Arnanz, Felix Sanchez, Marta Iglesias
Summary: A series of chiral polymeric aromatic frameworks containing novel enantiopure compounds were successfully synthesized and used as efficient catalysts after metalation, exhibiting good recyclability.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Arghyadeep Bhattacharyya, Mario Gutierrez, Boiko Cohen, Antonio Valverde-Gonzalez, Marta Iglesias, Abderrazzak Douhal
Summary: Mixed-metal organic frameworks (MMOFs) with introduction of a second or even a third metal atom enhance photocatalytic activity through favorable ligand-to-cluster charge transfer (LCCT) process and generation of long-lived charge-separated states (CSSs). Spectroscopic and photodynamical characterization of different metal cluster compositions in MOFs provides evidence for the relationship between photodynamics and photocatalytic activities. Higher LCCT efficiency and CSSs population in trimetallic MOF result in enhanced photocatalytic performance compared to monometallic MOF.
MATERIALS TODAY ENERGY
(2022)
Article
Green & Sustainable Science & Technology
Miguel Gomez-Mendoza, Mercedes Pintado-Sierra, Cristina Monterde, Mariam Barawi, Felix Sanchez, Marta Iglesias, Victor A. de la Pena O'Shea, Marta Liras
Summary: The presence of fluorine atoms in the CPP structure improves the photonic efficiency and hydrogen production when combined with TiO2. The hybrid catalyst Pt/CPP-FPA@T-10 shows almost twice the hydrogen production of Pt/CPP-PA@T-10 and 3.5 times higher than that of Pt/TiO2.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Nanoscience & Nanotechnology
Antonio Valverde-Gonzalez, M. Carmen Borrallo-Aniceto, Mercedes Pintado-Sierra, Felix Sanchez, Avelina Arnanz, Mercedes Boronat, Marta Iglesias
Summary: This study focuses on the enantioselective discrimination of racemic compounds using a new family of chiral conjugated BINOL-porous polymers (CBPPs). The CBPPs exhibit high thermal stability, a good specific surface area, and a robust framework, making them suitable for fluorescence recognition of enantiomers of terpenes and 1-phenylethylamine. The results show that the CBPPs prepared using the Sonogashira-Hagihara carbon-carbon coupling approach exhibit stronger selectivity towards one enantiomer compared to the reference BINOL-based soluble system.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Antonio Valverde-Gonzalez, M. Carmen Borrallo-Aniceto, Urbano Diaz, Eva M. Maya, Felipe Gandara, Felix Sanchez, Marta Iglesias
Summary: Studies have shown that tetrazole-based nitrogen-rich naphthalene cobalt-MOFs exhibit good catalytic activity and adsorption performance in the epoxidation of alkenes and CO2 cycloaddition reactions. These catalysts possess Lewis acid and redox functionalities and can simultaneously achieve both reactions through a one-pot tandem process.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Physical
Beatriz Fuerte-Diez, Elizabeth Rangel-Rangel, Marta Iglesias, Eva M. Maya
Summary: Homogeneous and heterogeneous catalytic systems based on BzmimCl assisted by strong bases were used for oxidative esterification of furfural to obtain MF. The catalytic systems showed high selectivity and conversion rates. The homogeneous catalyst systems exhibited better activity compared to similar ionic liquid systems, while the HCP-BzmimCl is the first heterogeneous metal-free catalyst for this reaction. HCP-BzmimCl can be recycled up to 5 times to obtain quantitatively methyl furoate using both bases.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Polymer Science
Sara Senorans, Isabel Valencia, Estibaliz Merino, Marta Iglesias, Manuel A. Fernandez-Rodriguez, Eva M. Maya
Summary: The first example of a porous polymer containing B-N covalent bonds prepared using the solvent knitting strategy is reported. The polymer exhibits micromeso porosity, high thermal stability, and potential properties as a highly stable and efficient photocatalyst. After the first run, the catalyst improves its photocatalytic activity and maintains this activity in successive runs, making it a new type of material with potential applications.
Article
Chemistry, Physical
Beatriz Fuerte-Diez, Elizabeth Rangel-Rangel, Felix Sanchez, M. Angeles Monge, Enrique Gutierrez-Puebla, Antonio Valverde-Gonzalez, Eva M. Maya, Marta Iglesias
Summary: In this study, a donor-acceptor porous conjugated polydiphenylpyreneimide (DPPy-PI) with high thermal stability and surface area was synthesized and evaluated as an efficient metal-free heterogeneous photocatalyst for selective oxidation and cycloaddition reactions.
JOURNAL OF CATALYSIS
(2023)