Article
Chemistry, Multidisciplinary
Yan Gao, Lilong Yang, Zhe Liu, Ruimin Gao, Guangfa Hu, Jianshe Zhao
Summary: A series of PIL-based POM salts were designed and synthesized, and supported catalysts were prepared for oxidative organic sulfide extraction in fuel oils. The supported catalyst showed better performance with maximum sulfur removal efficiencies up to 98.32% to 99.98%. The catalyst can be easily recovered and reused without significant activity decrease.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Hanxiang Chen, Shuting Hou, Haoyuan Cui, Chao Wang, Ming Zhang, Hongping Li, Hui Xu, Jiqing Wu, Wenshuai Zhu
Summary: The interfacial properties and active site distribution of catalysts have a significant impact on catalytic oxidative desulfurization activity, which has been a research focus in recent years. In this study, an amphiphilic and polyoxometalate poly(ionic liquids) were prepared through cross-linking copolymerization and ion exchange reaction for desulfurization in fuel. The resulting sample, p-C2VIM-DVB-2-PMo, exhibited enhanced desulfurization performance and good thermal stability, meeting the requirements for deep desulfurization. Density functional theory calculations were also utilized to investigate the adsorption strength and interaction nature between the cation and sulfide compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Niuniu Zhu, Manyu Zhang, Congcong Zhao, Guo Qiu, Hongyu Tian
Summary: In this study, poly (ionic liquid)s-silica spheres (PIL@SiO2) with various lengths of alkyl chains were prepared as effective core-shell catalysts for the synthesis of 5-hydroxymethylfurfural (5-HMF) from glucose and fructose. The PIL@SiO2-18 catalyst exhibited the highest yields of 77.36% and 72.8% from glucose and fructose, respectively, in methyl isobutyl ketone (MIBK)/saturated solution of sodium chloride (Sat.NaCl) biphasic solvent. The core-shell synergistic catalysis effectively promoted the preparation of 5-HMF from monosaccharide, with Lewis acidic polycationic centers contributing to the isomerization process. This approach provides an efficient strategy for the synthesis of 5-HMF from carbohydrates using silica-based core-shell synergistic catalysts.
MOLECULAR CATALYSIS
(2023)
Article
Energy & Fuels
Shao-Xu Mao, Qi-Hang Zhou, Hui-Li Guo, Ming Du, Wen-Shuai Zhu, Hua-Ming Li, Jing-Yu Pang, Dong-Bin Dang, Yan Bai
Summary: This article reports a novel porous phosphomolybdate-based poly(ionic liquid) catalyst with 70% water (PDIM-PMo-W70%). The catalyst showed a turnover frequency (TOF) value of 41.15 h-1 for dibenzothiophene (DBT) removal, which was 35.47 and 9.92 times higher than that of HPMo and PDIM-PMo, respectively. The effects of water content, reaction temperature, H2O2/S molar ratio, catalyst dosage, and different sulfur-containing compounds on the oxidative desulfurization (ODS) performance were investigated in detail.
Article
Chemistry, Physical
Vladislav Gorbunov, Aleksey Buryak, Kirill Oskolok, Andrey G. Popov, Irina Tarkhanova
Summary: In this article, a series of effective catalysts based on betaine and sulfuric or phosphomolybdic acids were obtained. These compositions were characterized and tested in the oxidation of sulfur- and nitrogenous-containing compounds by H2O2. The acidity change is non-linearly influenced by the amount of heteropolyacid (HPA), and the removal of sulfur-containing compounds is correlated with the concentration of Bronsted acid sites on the catalyst surface. On the other hand, the removal of pyridine is primarily determined by the content of heteropolyacids in the catalyst.
Article
Multidisciplinary Sciences
Sangar S. Ahmed, Omid Amiri, Karwan M. Rahman, Savana J. Ismael, Noor S. Rasul, Darya Mohammad, Karukh A. Babakr, Nabaz A. Abdulrahman
Summary: In this study, we developed a novel piezo-catalyst that can achieve excellent oxidative desulfurization of fuel at room temperature without the need for any oxidants. The study demonstrated that the CeO2/Ce2O3/NiOx nanocomposites exhibited outstanding desulfurization performance for both model and real fuels, and they also showed remarkable reusability. The investigation of the mechanism of sulfur oxidation revealed the involvement of superoxide radicals and holes, and the kinetic study confirmed a second-order reaction kinetic model for sulfur removal by the piezo-catalyst.
SCIENTIFIC REPORTS
(2023)
Article
Energy & Fuels
Shao-Xu Mao, Jun-Yi Song, Wen-Shuai Zhu, Hua-Ming Li, Jing-Yu Pang, Dong-Bin Dang, Yan Bai
Summary: Four new types of amphiphilic polyoxometalate-based poly(ionic liquid) (PDB-PMo, PDO-PMo, PDD-PMo and PDH-PMo) were synthesized and investigated for oxidative desulfurization (ODS). Among them, PDD-PMo exhibited high desulfurization rate, reaching 100% at a temperature range of 0-50 degrees C. The introduction of hydrophilic IL monomer was found to be an efficient strategy for constructing amphiphilic polyoxometalate-based poly(ionic liquid) and achieving ultra-deep desulfurization.
Article
Engineering, Environmental
Jian Wang, Biao Yang, Xuelian Peng, Yongcong Ding, Shanshan Yu, Fuqing Zhang, Linfeng Zhang, Huadong Wu, Jia Guo
Summary: A novel polyoxometalate-based ionic liquid salt [MIMPs]3PMo6W6O40 was designed and used as a catalyst in oxidative desulfurization, showing high activity in removing sulfur compounds with a low O/S molar ratio. The catalyst also exhibited excellent recyclability and efficiency in reducing sulfur compounds in real diesel.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yu-Zhu Wang, Zhuang-Zhuang Li, Zhong-Wen Liu, Xian-Ying Shi
Summary: Heterogenous carboxyl-functionalized bilayer ionic liquids/polyoxometalate catalysts were synthesized and characterized. The catalyst showed good amphiphilicity and achieved 100% sulfur removal for four model fuels without the need for extractant. The polyoxometalate and carrier had significant effects on the catalytic activities, with Keggin-type phosphotungstate and 50 nm silica being superior for desulfurization. The catalyst also demonstrated good recyclability in scale-up experiments.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Argam Akopyan, Polina D. Polikarpova, Nina Arzyaeva, Alexander Anisimov, Olga Maslova, Olga Senko, Elena N. Efremenko
Summary: This study investigated the effect of the hydrophobicity of mesoporous silicate SBA-15 on the catalytic activity and service life in the peroxide oxidation of sulfur-containing compounds. The immobilization of molybdate anion on SBA-15 support resulted in lower reaction temperature and longer catalyst lifespan. The hydrophobic catalyst showed insensitivity to initial sulfur content and hydrogen peroxide amount, retaining activity for at least six oxidation cycles.
Article
Chemistry, Physical
Diogenes H. Piva, Roger H. Piva, Monize Picinini, Ariano D. Rodrigues, Ernesto A. Urquieta-Gonzalez
Summary: It was found in this study that during calcination between 400 and 600 degrees Celsius, the SiO2 shell can maintain the superparamagnetic characteristics of the gamma-Fe2O3 core, while high temperature can cause sintering of the SiO2 shell and reduce the surface area. Additionally, due to the enhanced dispersion of dioxo (O=)(2)WO2 species, the catalyst calcined at 500 degrees Celsius showed impressive performance in catalytic oxidation of dibenzothiophene.
CATALYSIS COMMUNICATIONS
(2021)
Article
Energy & Fuels
Suhang Xun, Rongmin Le, Chenchao Hu, Desheng Liu, Songmei Wang, Minqiang He, Wenshuai Zhu, Huaming Li
Summary: In this study, supported catalysts V2O5/3D g-C3N4 were prepared using a solvothermal method and programmed calcination, with a vanadium-based ionic liquid (V-IL) [(C8H17)3NCH3]3H3V10O28 as the vanadium source and 3D porous carbon nitride (3D g-C3N4) as the carrier. The use of V-IL promoted the high dispersion of V2O5 on the carrier and effectively avoided agglomeration. As a result, the catalytic oxidative desulfurization activity of V2O5/3D g-C3N4 was greatly enhanced, reducing the content of dibenzothiophene in model oil to 1.2 ppm under appropriate conditions. The recycling capacity and the possible process of oxidative desulfurization were also discussed.
Article
Energy & Fuels
Suhang Xun, Rongmin Le, Chenchao Hu, Desheng Liu, Songmei Wang, Minqiang He, Wenshuai Zhu, Huaming Li
Summary: A series of supported catalysts V2O5/3D g-C3N4 were prepared using a solvothermal method and programmed calcination. The use of a vanadium-based ionic liquid (V-IL) promoted the high dispersion of V2O5 on the carrier and effectively prevented agglomeration. As a result, the catalytic oxidative desulfurization activity of V2O5/3D g-C3N4 was greatly enhanced, reducing the content of dibenzothiophene in model oil to 1.2 ppm under appropriate conditions. The recycling capacity and the possible process of oxidative desulfurization were also discussed.
Article
Materials Science, Multidisciplinary
Yuyang Wang, Yue Liang, Archana Bansode, Xiaoyuan Lou, Xinyu Zhang, Bryan S. Beckingham, Maria L. Auad
Summary: Ionic polymer-metal composites (IPMC) have shown great potential for soft actuator fabrication due to their low voltage actuation, fast response, basic control, and relatively light weight. In this study, PAA-based soft actuators with enhanced mechanical properties and proton conductivity are synthesized by incorporating hydrogen bonding interactions with imidazolium groups through copolymerization with 1-vinylimidazole. Additionally, a digital light projection (DLP) additive manufacturing process is utilized to fabricate complex geometries of IPMC devices, demonstrating their potential for complex actuation modalities.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
Aleksandr Glotov, Anna Vutolkina, Aleksey Pimerzin, Vladimir Vinokurov, Yuri Lvov
Summary: Catalytic hydroprocesses are important in oil refining and petrochemistry, with the tailored design of new metal nanosystems and optimization of support, composition, and structure being a prospective strategy for enhancing catalyst efficiency. Current research is focused on designing nanoscale porous materials, with ceramic materials like natural halloysite nanotubes being of special interest.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Ao Li, Hongyan Song, Xuebing Xu, Hong Meng, Yingzhou Lu, Chunxi Li
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2018)
Article
Engineering, Environmental
Ao Li, Hongyan Song, Hong Meng, Yingzhou Lu, Chunxi Li
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Energy & Fuels
Zhong Huang, Hongyan Song, Ao Li, Zhe An, Kaiqi Zhang, Xu Xiang, Xin Shu, Jing He
Article
Engineering, Chemical
Ao Li, Hongyan Song, Hong Meng, Yingzhou Lu, Chunxi Li
Summary: High-carbon alkyl dibenzothiophenes (DBTs) are challenging to remove from real diesel, and their steric effect plays a crucial role in heterogeneous catalytic oxidation desulfurization (ODS) process. By synthesizing mixed alkyl DBTs, it was found that their reactivity follows the order of DBT > C-2-DBT > C-2-C-2-DBT > C-3-DBT > C-3-C-3-DBT. In contrast to efficient heterogeneous ODS processes, a homogeneous ODS process of HAc-HPW-H2O2 can effectively remove C-3-DBT, C-2-C-2-DBT, and C-3-C-3-DBT, highlighting the importance of their steric effects in the heterogeneous catalytic process.
Article
Energy & Fuels
Ao Li, Hongyan Song, Hong Meng, Yingzhou Lu, Chunxi Li
Summary: The study enhances air oxidative desulfurization performance significantly through in-situ radical initiation on the CuO/SiO2@V-PIL catalyst interface, showing good stability for cumene and CHP. This technology holds promise for industrial application and may be applicable for oxidative removal of other organic pollutants.
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)