Article
Chemistry, Physical
Rita N. Sales, Carla D. Nunes
Summary: Desulfurization is crucial for eliminating sulfur compounds from fuel feedstocks, and MoO3 nanoparticles synthesized through hydrothermal method have shown to be efficient catalysts for oxidative desulfurization. The catalyst demonstrated enhanced activity and selectivity in the desulfurization process, with temperature and solvent influencing the conversion rate. The catalytic performance of MoO3 nanomaterial was comparable or superior to other catalysts reported in literature.
Article
Nanoscience & Nanotechnology
Yu Liu, Jiabao Bai, Ya Song, Huawei Yang, Lixia Yang, Liangjiu Bai, Donglei Wei, Wenxiang Wang, Xinxiang Cao, Ying Liang, Hou Chen
Summary: Iron-intercalated molybdenum oxides nanobelts have been reported as a durable and robust catalyst for aerobic oxidative desulfurization, catalyzing the reaction efficiently at 80 degrees C by precisely modulating the electronic structure to increase surface oxygen vacancy density. The optimized doping amount enables the catalyst with excellent catalytic performance through thorough conversion of various sulfides, making it a candidate for sustainable fuel desulfurization. The strategy demonstrated here provides practical guidance for the rational design and optimization of Mo-based catalysts to promote aerobic oxidation reactions.
ACS APPLIED NANO MATERIALS
(2021)
Article
Energy & Fuels
Wei Jiang, Jin Xiao, Xiang Gao, Xin An, Yupeng Leng, Linhua Zhu, Wenshuai Zhu, Huaming Li
Summary: In this study, a hollow silica confined defective molybdenum oxide catalyst was successfully prepared, demonstrating higher activity and desulfurization efficiency compared to a solid silica-supported catalyst. Oxygen defects were found to play a positive role in promoting oxidation reactions, and the catalyst exhibited good stability and selectivity, making it a promising candidate for industrial applications.
Article
Chemistry, Multidisciplinary
Juncong Zou, Yan Lin, Chunping Yang
Summary: Oxidative desulfurization (ODS) is a promising technology for clean fuel production, but the exceptional catalytic activity of amorphous molybdenum oxides (MoOx) remains unclear. This study reveals the crucial role of Mo-O covalency in determining the catalytic activity of amorphous MoOx. The enhanced Mo-O covalency improves the interaction between MoOx and H2O2, resulting in outstanding ODS catalytic activity.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Engineering, Environmental
Youwei Sun, Wenyu Long, Jian Zhang, Yanjuan Wang, Shaozheng Hu, Yixin Lian, Weizhou Jiao, Ruixin Wang, Yazhou Zhang, Haiqiang Lin, Xinping Duan
Summary: The interfacial wettability and electronic modulation of catalysts can be effectively controlled through surface treatments, improving catalytic performance. This study presents a green oxidative desulfurization (ODS) system using a modular ionic liquid trigger and anchored catalyst. The catalyst exhibits high activity and stability for deep oxidation of C-S bonds, and the adsorption and pre-activation of C-S bonds on the hydrophilic surface are crucial for the ODS reaction. The study also suggests a possible mechanism involving electron transfer and reactive centers.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Xiao Bing Liu, Qi Rong, Jin Tan, Chen Chen, Yu Lin Hu
Summary: Catalytic oxidation of organic sulfides is important in industrial chemistry and fuel industry. Metal-ionic liquid catalytic systems are versatile and adaptable in the selective oxidation of sulfides.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Md Mahmudul Hassan Mondol, Biswa Nath Bhadra, Sung Hwa Jhung
Summary: A new composite material named PMA(x) @MAF-6 was prepared by combining metal-azolate framework (MAF-6) with phosphomolybdic acid (PMA). Mo2N, dispersed on porous carbon without external nitrogen sources, was obtained by carbonization of PMA(x)@MAF-6. The catalyst Mo2N@C showed remarkable performance in oxidative desulfurization (ODS) with H2O2 as an oxidant, with high turnover frequency and low activation energy.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Bo Yuan, Xiaolin Li, Yinyong Sun
Summary: Oxidative desulfurization (ODS) has gained much attention for its effective removal of difficult-to-desulfurize aromatic sulfur-containing compounds. Molecular oxygen has been recognized as an ideal oxidant in ODS, and porous materials and their composites have become ideal catalysts for aerobic oxidation reactions due to their high surface area and confined pore space. These catalysts have received significant attention in AODS for their improvement in catalytic activity and durability.
Article
Engineering, Environmental
Elvana Cako, Reza Darvishi Cheshmeh Soltani, Xun Sun, Grzegorz Boczkaj
Summary: A combination of dual-frequency acoustic cavitation and UV assisted advanced oxidation processes was developed for desulfurization of raw naphtha. The hybrid process of acoustic cavitation/peracetic acid/hydrogen peroxide showed the most effective treatment with high desulfurization efficiency. The alternative treatment process of acoustic cavitation/UV/acetone/water achieved complete desulfurization of specific sulfur compounds.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Xinxiang Cao, Ruijian Tong, Jingyuan Wang, Lan Zhang, Yulan Wang, Yan Lou, Xiaomeng Wang
Summary: Flower-like cobalt-molybdenum mixed-oxide microspheres (CoMo-FMs) with a hierarchical structure were successfully synthesized. The CoMo-FMs were assembled from ultrathin mesoporous nanosheets, which contributed to a large pore volume and a massive surface area. The synthesized CoMo-FMs demonstrated excellent catalytic performance in the aerobic oxidative desulfurization (AODS) of fuel.
Article
Chemistry, Applied
Lei Chen, Zhong-Pan Hu, Jin-Tao Ren, Zheng Wang, Zhong-Yong Yuan
Summary: Mesoporous titanium phosphonates (MTP) were synthesized as support for molybdenum oxides in oxidative desulfurization (ODS) reactions. The electron-donating effect of organophosphonate ligands on Mo active sites led to high electron density, improving the efficiency and stability of ODS reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Organic
M. S. S. Vinod Mouli, Dipayan Mondal, Kusum Kumari, Saurabh Kumar Singh, Ashutosh Kumar Mishra
Summary: A bioinspired mimic was designed and investigated for stabilizing hydroperoxyflavin intermediate formation in monooxygenase-like catalytic reactions. Peptides were attached to the neutral isoalloxazine core, and it was found that the presence and identity of the peptide appendage were crucial for catalytic efficiency. Theoretical studies further supported the importance of precise conformational requirements for stabilizing the hydroperoxyflavin intermediate.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Applied
Wen-Ting Chen, Song Han, Zhi-Hong Dai, Yu-Xuan Fu, Ming-Shuai Sun, Zhang-Min Li, Yan Zhou, Duan-Jian Tao
Summary: A MoO2/Mo2C hybrid catalyst supported by N-doped carbon was successfully prepared, showing moderate mesoporosity, uniform metallic nanoparticles, and rich oxygen vacancies. It exhibited excellent catalytic efficiency and reusability for oxidative self-coupling of benzylamine, as well as universal applicability for oxidative coupling of other primary amines to imines.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Engineering, Environmental
Lei Chen, Jin-Tao Ren, Zhong-Yong Yuan
Summary: This study demonstrates the importance of the electronic structure of active sites in the oxidative desulfurization process. By designing a hollow spherical molybdenum phosphonate catalyst with -OH functional groups, the researchers were able to modulate the electronic structure at the molecular level and accelerate the reaction. This research provides new inspiration for manipulating the nanostructures and electronic states of metal phosphonates for green catalysis.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Wenhui Wang, Wei Gao, Xinhao Nie, Weihua Liu, Xiang Cheng, Ningzhao Shang, Shutao Gao, Chun Wang
Summary: A series of hyper-cross-linked polymers (HCPs) photocatalysts were synthesized through Friedel-Crafts alkylation reaction. Different crosslinkers could change the energy level of HCPs, affecting their photocatalytic performance. Among them, DCM-HCPs showed the highest conversion and selectivity, as well as high production of H2O2 under blue LED lamp and sunlight irradiation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Applied
Diana P. Gomes, Andreia F. Silva, Ana C. Gomes, Patricia Neves, Anabela A. Valente, Isabel S. Goncalves, Martyn Pillinger
Summary: The study focused on the confinement and catalytic behavior of Mo(CO)(6) species encapsulated in UiO-66 metalorganic frameworks, demonstrating their immobilization within the pore spaces of the hosts and their catalytic activity in olefin epoxidation. Excellent epoxide selectivity and efficiency were achieved, along with catalyst recycling and structural integrity retention. The study also highlighted the broader substrate scope and potential of UiO-66(Hf) as a catalyst support compared to its Zr counterpart.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Donatella Giomi, Jacopo Ceccarelli, Antonella Salvini, Marika Pinto, Alberto Brandi
Summary: The reduction of aromatic nitro compounds can be efficiently achieved using Wang-PQM catalyst and NaBH4, leading to high yields of azo and/or hydrazoarenes.
Article
Chemistry, Physical
Jacopo De Maron, Tommaso Tabanelli, Francesca Ospitali, Carlos Lopez Cruz, Paolo Righi, Fabrizio Cavani
Summary: For the first time, the continuous-flow, gas-phase oxidative dehydrogenation (ODH) of an actual mixture of decen-1-ol isomers (Isorosalva alcohol) towards the corresponding mixture of aldehydes (Costenal analogues, valuable ingredients in perfumes formulation) was achieved over noble metal-free catalysts. The optimized reaction conditions over a copper ferrite (Cu/Fe/O) and the characterization of the catalytic material revealed the important role of well dispersed copper oxide over a Fe-enriched spinel in promoting the selective ODH of Isorosalva alcohol. The high dispersion of Cu over the support and the cooperative effect between Cu and Fe species were identified as the main factors for the superior catalytic activity and selectivity of CuO/gamma-Fe2O3.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Riccardo Bacchiocchi, Jacopo De Maron, Tommaso Tabanelli, Daniele Bianchi, Fabrizio Cavani
Summary: By investigating the catalytic activity of various Re-based catalysts, we confirmed the crucial role of support acidity in promoting the ring-opening of γ-valerolactone (GVL) and its consecutive reduction to valeric compounds. Under optimized conditions, bimetallic Re-Ru-O/HZSM-5 yielded methyl valerate (MV) and valeric acid (VA) with high productivity. However, we found that Re-based catalysts undergo leaching of the active phase in the presence of carboxylic acids, limiting their recyclability.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Applied
Diana M. Gomes, Andreia F. Silva, Ana C. Gomes, Patricia Neves, Anabela A. Valente, Isabel S. Goncalves, Martyn Pillinger
Summary: The development of new catalysts is important for expanding the horizons of epoxidation and sulfoxidation processes. In this study, three pyrazine-bridged molybdenum-based coordination networks were investigated for their efficiency in these reactions. The catalysts showed high activity and selectivity for both epoxidation of olefins and oxidation of sulfides.
Article
Chemistry, Physical
Iqra Zubair Awan, Phuoc Hoang Ho, Giada Beltrami, Olinda Gimello, Thomas Cacciaguerra, Pierrick Gaudin, Nathalie Tanchoux, Stefania Albonetti, Annalisa Martucci, Fabrizio Cavani, Didier Tichit, Francesco Di Renzo
Summary: Ethanol is used as a renewable hydrogen-donor for the conversion of a lignin model molecule. Noble metal-free porous mixed oxides derived from Cu-Ni-Al and Cu-Ni-Fe layered double hydroxide (LDH) precursors act as heterogeneous catalysts for the hydrogen transfer and hydrogenation reactions. The activity and selectivity of the catalysts are influenced by the Cu/(Cu+Ni) ratio and the trivalent cation (Al or Fe), as well as the cleavage of lignin-like phenylether bonds. The composition of the LDH precursors has a significant impact on the structural and textural properties of the catalysts.
Article
Chemistry, Physical
Martinique S. Nunes, Diana M. Gomes, Ana C. Gomes, Patricia Neves, Ricardo F. Mendes, Filipe A. Almeida Paz, Andre D. Lopes, Martyn Pillinger, Anabela A. Valente, Isabel S. Goncalves
Summary: The discovery of a hybrid catalyst synthesized from renewable biomass is attractive for its environmental and economic benefits. This catalyst demonstrates stable catalytic activity for the oxidation of olefins and sulfides.
Article
Materials Science, Biomaterials
Andreia F. Silva, Isabel B. Calhau, Ana C. Gomes, Anabela A. Valente, Isabel S. Goncalves, Martyn Pillinger
Summary: Metal-organic frameworks (MOFs) have potential as nanoplatforms for the storage and delivery of therapeutic gasotransmitters. Tricarbonyl-pyrazine-molybdenum (0) MOFs were investigated for their ability to release carbon monoxide (CO). The study found that these MOFs can release high amounts of CO in the dark, making them attractive as potential CO-releasing materials.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Chemistry, Physical
Francesco Puzzo, Noemi Capece, Laura Setti, Giulia Pavarelli, Jacopo De Maron, Tommaso Tabanelli, Fabrizio Cavani
Summary: The transformation of 1-butanol into butenes or maleic anhydride was investigated using V/P/O catalysts with and without oxygen. Selectivity to butenes was higher than 90% at temperatures below 240 degrees C without oxygen, while maleic and phthalic anhydrides were the main products with selectivity of 60% and 14% at temperatures above 300 degrees C in the presence of air. Crystallinity and acidity of the catalysts affected their catalytic performance.
APPLIED CATALYSIS A-GENERAL
(2023)
Review
Chemistry, Inorganic & Nuclear
Patricia Neves, Diana M. Gomes, Isabel S. Goncalves, Martyn Pillinger, Anabela A. Valente
Summary: Catalysis is a fundamental field that contributes to the greenness and sustainability of chemical processes. A recent discovery in this field is reaction-controlled self-separating metal-based catalytic systems, which combine features of both homogeneous and heterogeneous catalysis. This system allows easy separation and reuse of the catalyst, without requiring energy-intensive downstream processes.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Physical
Giancosimo Sanghez de Luna, Tommaso Tabanelli, Juan J. Velasco-Velez, Eleonora Monti, Francesca Ospitali, Stefania Albonetti, Fabrizio Cavani, Giuseppe Fornasari, Patricia Benito
Summary: The selective electrochemical oxidation of biomass compounds is a promising approach to reduce the carbon footprint in the chemical industry. However, achieving the selective production of desired reaction products from highly reactive biomass compounds remains a challenge.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Multidisciplinary
Eleonora Monti, Alessia Ventimiglia, Luke Forster, Elena Rodriguez-Aguado, Juan Antonio Cecilia, Francesca Ospitali, Tommaso Tabanelli, Stefania Albonetti, Fabrizio Cavani, Ivan Rivalta, Carmine D'Agostino, Nikolaos Dimitratos
Summary: Supported Au colloidal nanoparticles were synthesized with the presence of stabilizing polymers, including PVA, PVP and PEG. The polymer to Au weight ratio was varied to control the particle size and distribution of the nanoparticles, resulting in mean diameters ranging from 3 to 8 nm. The synthesized Au catalysts were evaluated for the oxidation of glucose to glucaric acid, with the highest yield (22%) achieved using Au-PVA catalysts. Deactivation of the Au catalysts was observed and further investigation was conducted to determine the reasons.
Article
Chemistry, Multidisciplinary
Aduraseyi A. Adeoye, Fabrizio Passarini, Jacopo De Maron, Tommaso Tabanelli, Fabrizio Cavani, Daniele Cespi
Summary: Green chemistry is a response from the chemical industry to improve environmental responsibility and address its reputation as one of the most polluting sectors. This study compared the environmental impacts of three different approaches to methyl methacrylate (MMA) production using life cycle assessment methodology. The results highlighted areas for process improvements and the potential benefits of green chemistry principles. However, limitations in the methodology required the use of an additional tool, GREEN MOTION, to assess potential risks. Overall, the study emphasized the importance of data quality, process optimization, and energy sources in achieving favorable results in life cycle assessments.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
