Article
Energy & Fuels
Jiazheng Sun, Shuxiang Xiong, Hailong Lin, Qiong Wu, Linfei Xiao, Zhenni Liu, Xiujie Li, Wei Wang, Wei Wu
Summary: In this work, hierarchical ZSM-23 zeolites were synthesized using cationic surfactants and cationic polyelectrolytes as growth modifiers, and Pd/ZSM-23 catalysts were prepared. The addition of appropriate growth modifiers significantly improved the yield of iso-alkane products and limited the cracking process, with Pd/Z23-5PP catalyst showing the highest yield.
Article
Chemistry, Physical
Douglas Romero, Roderigh Rohling, Lingqian Meng, Marcello Rigutto, Emiel J. M. Hensen
Summary: The hydroconversion of n-hexadecane and n-heptane catalyzed by Pd/zeolite is influenced by the Bronsted acidity and crystalline domain size. Smaller alkanes are more significantly impacted by variations in the zeolite domain size.
JOURNAL OF CATALYSIS
(2021)
Article
Biochemistry & Molecular Biology
Margarita Popova, Agnes Szegedi, Manuela Oykova, Hristina Lazarova, Neli Koseva, Magdolna R. Mihalyi, Pavletta Shestakova
Summary: The study characterized mono- and bimetallic Ni-, Ru- and Pt-modified hierarchical ZSM-5 materials through various techniques and found that the uniqueness of the zeolite structure and modification procedure determined the type, dispersion, and reducibility of formed metal oxides. The acidity of the samples and changes in zeolite structure were investigated, while the catalysts were tested in gas-phase reactions for phenol production from model lignin derivative molecules.
Article
Engineering, Environmental
Hue-Tong Vu, Florian Maximilian Harth, Michael Goepel, Noemi Linares, Javier Garcia-Martinez, Roger Glaser
Summary: Introduction of mesopores into zeolite Y using surfactant-templating method resulted in a bifunctional catalyst with improved mass transfer properties and higher catalytic activity in the aqueous-phase hydrogenation of levulinic acid to gamma-valerolactone. The presence of additional mesopores in the hierarchical pore system is proven to enhance the catalyst performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Applied
Xuemin Li, Tao Pan, Jungkyu Choi, Heon Park, Zhijie Wu, Alex C. K. Yip
Summary: In this study, TON- and MFI-type zeolites with 10-membered rings were synthesized using ionic liquid-templating method. Their catalytic performances in propene dimerization were investigated. Despite different Si/Al ratios, the TON- and MFI-type zeolites showed comparable propene dimerization turnover rates due to their similar acid site strength. The different channel structures and acid properties of zeolite were responsible for the variation in catalytic selectivity between TON- and MFI-type zeolites.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Sreeprasanth Pulinthanathu Sree, Sambhu Radhakrishnan, Lisa Geerts, Tom Van der Donck, Gina Vanbutsele, Eric Breynaert, Jin Won Seo, Johan A. Martens
Summary: The hierarchization of the less studied zeolite ISI-1, through desilication, showed promising potential for catalytic applications in the hydroconversion of long chain n-alkanes. Despite the evidence of notable inhomogeneity in the dispersion of platinum nanoparticles, the catalyst exhibited high isomerization yields, indicating the effectiveness of desilication as a strategy for hierarchization.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yujie Liu, Elisabet Huertas Osta, Artem S. Poryvaev, Matvey Fedin, Alessandro Longo, Alexei Nefedov, Nikolay Kosinov
Summary: This study explores the direct conversion of methane into hydrogen gas, hydrocarbons, and valuable carbon materials. The effects of reaction conditions and zeolite topology on carbon material growth were investigated, and the insights obtained were used to prepare high-quality carbon materials from methane.
Article
Chemistry, Applied
Mahashanon Arumugam, Ka-Lun Wong, Arjun Nadarajan, Sin Yuan Lai, Chee Keong Goh, Sugeng Triwahyono, Yun Hin Taufiq-Yap
Summary: Micellization of zeolite precursor seeds with surface passivating organosilane groups is an effective technique to reduce crystallite aggregation and produce hierarchically porous materials with additional mesopores. By changing the synthesis environment of the surface passivation process, the average particle size and pore architecture of the zeolite can be altered. Using low hazard organic solvents with different hydrophobicities as a matrix for surface organosilanization and crystallization processes has shown promising results in this study.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Peng Wang, Xia Xiao, Yutong Pan, Zhen Zhao, Guiyuan Jiang, Zhongdong Zhang, Fanfang Meng, Yuming Li, Xiaoqiang Fan, Lian Kong, Zean Xie
Summary: Nanosheet-stacked hierarchical ZSM-5 zeolite was synthesized using a seed-assisted hydrothermal synthesis route. The morphology and textural properties of the catalysts were finely modulated by varying the molar ratio of structure-directing agent and growth modifier. The MFI zeolite nanosheets exhibited better anticoking stability and higher selectivity to light olefins.
Article
Chemistry, Multidisciplinary
Y. Shi, W. Gao, G. Wang, J. Fan, C. Wang, F. Wang, Y. He, X. Guo, S. Yasuda, G. Yang, N. Tsubaki
Summary: An efficient bifunctional ZnCr2O4-ZSM-22 catalyst was developed for direct conversion of CO2 to ethylene, achieving 24.0% ethylene selectivity and 21.9% CO2 conversion. The catalyst exhibited a high ethylene/light olefin ratio of over 93% and demonstrated superior stability with no significant deactivation over 60 hours. The study systematically investigated the effects of various factors on the catalytic performances, providing a new avenue for CO2 conversion to ethylene.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Applied
T. Onfroy, Z. Qin, S. Casale, V. Valtchev
Summary: Preparation of hierarchical zeolites through chemical etching is a popular research topic due to its significant improvement on diffusive properties and catalytic activity of microporous materials. This study optimizes the NH4F etching process by using less concentrated solutions and milder conditions, demonstrating the possibility of softening the post-treatment conditions by adjusting synthesis parameters such as NH4F/ZSM-5 ratio, etching time, and initial NH4F concentration, resulting in the generation of mesopores with different diameters.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Engineering, Chemical
Nebojsa Korica, Pedro S. F. Mendes, Jeriffa De Clercq, Joris W. Thybaut
Summary: The study found that the presence of methylcyclohexane affects the hydroconversion of n-octane over Pt/HUSY catalysts, but does not impact the behavior of methylcyclohexane itself. This is mainly due to the preferred adsorption of cycloalkanes on metal sites, leading to a shift from ideal to nonideal hydrocracking.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Vijendra Singh, Selvamani Arumugam, Anup Prakash Tathod, Viswanadham Nagabhatla
Summary: This study presents an efficient catalytic process using a bi-metallic ZSM-5 supported catalyst to convert glycerol into liquid fuel with high concentration of alkyl-aromatics and octane potential. This process also produces a hydrogen-rich gas stream that can be used as a green fuel. It significantly increases the value addition of bio-glycerol and improves the fuel yield of biodiesel production process.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Larissa Brito, Gerhard D. Pirngruber, Javier Perez-Pellitero, Emmanuelle Guillon, Florian Albrieux, Johan A. Martens
Summary: The study found that hydroconversion of perhydrophenanthrene on different catalysts resulted in different intermediate products, which can be explained by adsorption selectivity and shape selectivity of the reaction network. USY-based catalysts were the most active among the solids tested, while Beta zeolites were slightly more selective in generating cracked products.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Jadranka Milikic, Srna Stojanovic, Ljiljana Damjanovic-Vasilic, Rastko Vasilic, Lazar Rakocevic, Slavica Lazarevic, Biljana Sljukic
Summary: The study found that calcined forms of ZSM-5 and beta zeolites can be used as better electrocatalysts for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) due to more active sites and decreased charge-transfer resistance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Ruben Ramos, Jose M. Hidalgo, Michael Gonel, Zdenek Tiser, Francine Bertella, Agustin Martinez, Oleg Kikhtyanin, David Kubicka
CATALYSIS COMMUNICATIONS
(2018)
Article
Chemistry, Physical
Sara Moussa, Patricia Concepcion, Maria A. Arribas, Agustin Martinez
Article
Chemistry, Physical
G. M. Cabello Gonzalez, R. Murciano, A. L. Villanueva Perales, A. Martinez, F. Vidal-Barrero, M. Campoy
APPLIED CATALYSIS A-GENERAL
(2019)
Article
Chemistry, Applied
G. M. Cabello Gonzalez, P. Concepcion, A. L. Villanueva Perales, A. Martinez, M. Campoy, F. Vidal-Barrero
FUEL PROCESSING TECHNOLOGY
(2019)
Article
Chemistry, Physical
Francine Bertella, Christian W. Lopes, Alexandre C. Foucher, Giovanni Agostini, Patricia Concepcion, Erich A. Stach, Agustin Martinez
Article
Chemistry, Applied
Sophia Mohammadnasabomran, Ahmad Tavasoli, Yahya Zamani, Carlos Marquez-Alvarez, Joaquin Perez-Pariente, Agustin Martinez
FUEL PROCESSING TECHNOLOGY
(2020)
Article
Engineering, Chemical
Sara Escorihuela, Fidel Toldra-Reig, Sonia Escolastico, Raul Murciano, Agustin Martinez, Jose Manuel Serra
Summary: By depositing a Cu-based protective layer on the surface of self-supported palladium tubular membranes, selective and controlled addition of H-2 can be achieved in Fischer-Tropsch synthesis, increasing hydrocarbon yield and reducing methane formation.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Sara Moussa, Patricia Concepcion, Maria A. Arribas, Agustin Martinez
APPLIED CATALYSIS A-GENERAL
(2020)
Article
Chemistry, Applied
G. M. Cabello Gonzalez, A. L. Villanueva Perales, M. Campoy, J. R. Lopez Beltran, A. Martinez, F. Vidal-Barrero
Summary: A kinetic model has been developed to describe the one-step conversion of ethanol into 1,3-butadiene over a mixed catalyst, taking into account the effect of water content on catalyst performance. The model, validated using experimental data, can predict the formation of major and minor compounds accurately, with room for improvement in predicting certain products. This modelling approach is expected to be applicable to other one-step catalysts.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Applied
G. M. Cabello Gonzalez, A. L. Villanueva Perales, A. Martinez, M. Campoy, F. Vidal-Barrero
Summary: This paper investigates key issues in the design of industrial ethanol to 1,3-butadiene two-step processes, with a focus on the performance of Ta-SBA-15 catalyst under different operating conditions and the influence of water on catalyst stability. The results reveal complex interacting effects between reaction conditions and emphasize the importance of careful selection to optimize catalyst performance.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Mercedes Boronat, Maria J. Climent, Patricia Concepcion, Urbano Diaz, Hermenegildo Garcia, Sara Iborra, Antonio Leyva-Perez, Lichen Liu, Agustin Martinez, Cristina Martinez, Manuel Moliner, Joaquin Perez-Pariente, Fernando Rey, Enrique Sastre, Pedro Serna, Susana Valencia
Summary: This article introduces the significant contributions of Prof. Avelino Corma in the field of heterogeneous catalysis and materials science. It highlights his remarkable achievements in areas such as solid catalysts, materials synthesis, and photochemistry. The article also emphasizes the importance of the research methods and paradigms developed by Avelino and his team in addressing new scientific challenges in building a sustainable world.
Article
Chemistry, Physical
Jaroslav Aubrecht, Violetta Pospelova, Agustin Martinez, Patricia Concepcion, Oleg Kikhtyanin, Petr Straka, David Kubicka
Summary: This study investigated the structural transformation of five CuZnAl catalysts with different Cu/Zn and Al/(Cu+Zn) atomic ratios. It was found that the catalyst with lower Cu loading exhibited higher activity after reduction.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Sophia Mohammadnasabomran, Carlos Marquez-Alvarez, Joaquin Perez-Pariente, Agustin Martinez
Summary: Grafting aluminum onto SBA-15 improves Co dispersion and results in a more homogeneous distribution of metal species. However, the Al-grafted CoRu/Al-SBA-15 catalyst shows lower activity in Fischer-Tropsch synthesis compared to the all-silica CoRu/SBA-15 counterpart, but exhibits enhanced selectivity towards liquid hydrocarbons.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Natalia Suarez, Maria A. Arribas, Andres Moreno, Agustin Martinez
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
Review
Chemistry, Multidisciplinary
Mariya Shamzhy, Maksym Opanasenko, Patricia Concepcion, Agustin Martinez
CHEMICAL SOCIETY REVIEWS
(2019)
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)