Article
Biochemistry & Molecular Biology
Mihail Mihaylov, Elena Ivanova, Videlina Zdravkova, Stanislava Andonova, Nikola Drenchev, Kristina Chakarova, Radoslav Kefirov, Rositsa Kukeva, Radostina Stoyanova, Konstantin Hadjiivanov
Summary: This study explores the potential of Cu/ZSM-5 as an adsorbent for the purification of hydrogen from CO. The results show that Cu/ZSM-5 has high selectivity for CO adsorption. The samples prepared by different methods, aqueous solution cation exchange and solid-state exchange, exhibit different Cu ion contents, but both demonstrate good CO adsorption performance. The findings of this study are significant for hydrogen purification.
Article
Chemistry, Physical
Tong Qiao, Zhigang Liu, Changhong Liu, Wei Meng, Hong Sun, Ying Lu
Summary: The study demonstrates that the location of MnOx nanoparticles in MnOx-ZSM-5 catalysts significantly influences the catalytic activity for NH3-SCR, with MnOx clusters dispersed on the outside exhibiting higher activity at low temperatures than those encapsulated in the channels of the support. The redox ability and Mn3+ species play crucial roles in enhancing the oxidation of NO and formation of unstable NOx intermediates, ultimately improving the SCR activity at lower temperatures.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Multidisciplinary
Shadi Al-Nahari, Eddy Dib, Claudia Cammarano, Etienne Saint-Germes, Dominique Massiot, Vincent Sarou-Kanian, Bruno Alonso
Summary: The use of mineralizing agents (F- or OH-) in hydrothermal synthesis directly affects the distribution of Al sites in ZSM-5 zeolites. The Si/Al ratio impacts the proportions of Al sites for F-, whereas it remains constant for OH-. This understanding provides new and simple opportunities to control the acidity of zeolites.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Nanoscience & Nanotechnology
Nathan B. Jones, Bradley Gibbons, Amanda J. Morris, John R. Morris, Diego Troya
Summary: There is a strong demand for materials that can safely and reversibly store the toxic and highly reactive diborane gas at room temperature. This study investigates the interfacial chemistry of diborane storage in the UiO-66-NH2 metal-organic framework (MOF) and reveals a promising pathway for stable and long-term storage of diborane.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yanfeng Shen, Zhengxing Qin, Shunsuke Asahina, Natsuko Asano, Guanqun Zhang, Shuya Qian, Yanhang Ma, Zifeng Yan, Xinmei Liu, Svetlana Mintova
Summary: This study reveals the defect-zoning and Al-zoning in pseudo-single ZSM-5 crystals through unbiased NH4F etching, describing the formation process of these zones and establishing the correlation between Al zoning and the spatial distribution of C and Na. The distinct inner heterogeneity in the ZSM-5 crystals sheds light on the crystal growth process, providing insights for developing novel framework structures with targeted properties.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Engineering, Environmental
Shuhui Wu, Yaquan Wang, Chao Sun, Taotao Zhao, Jingjing Zhao, Ziyang Wang, Wenrong Liu, Jiaxin Lu, Mingxue Shi, Aijuan Zhao, Lingzhen Bu, Zhiqiang Wang, Mengyao Yang, Yaqiong Zhi
Summary: This study prepared a series of Y/ZSM-5 zeolite composites through a VPT method, showing excellent adsorption performance for volatile organic compounds and good performance under humid conditions after dealumination treatment. The composites had larger adsorption capacities for aromatics, alkanes, and esters.
CHEMICAL ENGINEERING JOURNAL
(2021)
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, 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
Peerapol Pornsetmetakul, Sorasak Klinyod, Chadatip Rodaum, Saros Salakhum, Ploychanok Iadrat, Emiel J. M. Hensen, Chularat Wattanakit
Summary: By fine-tuning the texture of HZSM-5 catalysts and reducing the crystal size to ultra-thin nanosheet, high and stable ethylene yield can be achieved from ethanol dehydration.
Article
Chemistry, Physical
Son Dong, Houqian Li, Iris K. Bloede, Abdullah J. Al Abdulghani, Edgard A. Lebron-Rodriguez, George W. Huber, Ive Hermans
Summary: The catalytic conversion of model compounds for plastic pyrolysis oil (1-octene, octadiene, octane, and toluene) over ZSM-5 in a fixed-bed reactor was investigated mechanistically. The conversion of 1-octene resulted in the production of benzene, toluene, xylene, coke, and hydrogen through a series of cracking, oligomerization, cyclization, and hydrogen transfer reactions. Octadiene mainly contributed to reactor fouling through thermal coking, while octane and toluene were converted through cracking reactions and disproportionation, dealkylation, and coking reactions, respectively. The use of mesoporous ZSM-5 maintained product selectivity for 70 hours in time-on-stream experiments.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Nanoscience & Nanotechnology
Zhongwen Dong, Chuanyu Yang, Dongpu Zhao, Yanan Wang, Weifeng Chu, Zhaochi Feng, Xiangxue Zhu, Wenjie Xin, Yongchen Shang, Shenglin Liu, Longya Xu
Summary: A new interzeolite transformation method has been developed for the quick synthesis of nanoaggregate catalyst CDM-5, where the formation process of ordered aluminosilicate aggregate species was revealed through UV-Raman spectra and HRTEM, SEM images.
ACS APPLIED NANO MATERIALS
(2021)
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
Chemistry, Applied
Y. Zhang, B. Louis
Summary: A modified ZSM-5 zeolite with high external surface area (ESA) and mild acidity was efficiently synthesized using a biochar obtained from algae as a hard template. The modified zeolite exhibited an ESA of 171 m2/g, compared to 121 m2/g for pristine ZSM-5. It also showed improved catalytic lifetime in the methanol-to-hydrocarbons (MTH) reaction, with a methanol conversion >95% for 16 hours, compared to only 10 hours for H-ZSM-5.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Applied
Zoya N. Lashchinskaya, Anton A. Gabrienko, Alexander G. Stepanov
Summary: The transformation of propene on copper-modified ZSM-5 zeolite has been investigated using 13C MAS NMR and FTIR spectroscopy. Two major reaction pathways, namely aromatization to benzene and toluene, and oxidation to acrolein, have been identified. Copper-allyl species are found to be key intermediates in both processes. The role of different active sites, including Cu2+-O2- Lewis acid-base pairs and [Cu3(mu-O)3]2+ oxo-clusters, in the formation of allylic species and the oxidation of copper-allyls has been established. The obtained results are important for the development of zeolite-based catalysts for propene aromatization to simple aromatic compounds and the partial oxidation to acrolein.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Applied
Yu Zhang, Q. Wang, B. Louis
Summary: ZSM-5 zeolite crystals were successfully grown on perlite supports using an in situ hydrothermal synthesis method. The resulting ZSM-5/perlite composite materials exhibited promising potential for application in the Methanol-To-Olefins reaction (MTO) due to their highly porous structure and large particle size. The optimized ZSM-5/perlite catalyst showed excellent stability with high methanol conversion and selectivity towards light olefins.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Applied
Linhao Yu, Hong Chen, Yingying Li, Zhe Wen, Yongdan Li
Summary: In this study, metallic cobalt supported on nitrogen-doped carbon material was used as an efficient catalyst for the oxidative esterification of 5-hydroxymethylfurfural (HMF) to furan-2,5-dimethylcarboxylate (FDMC). The carbonization temperature had a significant impact on the morphology and structure of Co/N-C samples. Co/ N-C calcined at 900 degrees Celsius showed the best catalytic performance, with a 73.8% FDMC yield at a 91.7% HMF conversion rate measured at 130 degrees Celsius for 20 hours with K2CO3 under 1 MPa O-2. The catalytic activity of Co/N-C was enhanced by the synergistic effect between metallic cobalt and nitrogen-doped carbon material. A reaction mechanism for FDMC formation was proposed.
Editorial Material
Chemistry, Applied
Zhaofu Fei, De Chen, Emiel J. M. Hensen, Yongdan Li, Rajenahally Jagadeesh
Article
Engineering, Environmental
Qianyuan Qiu, Zheng-Ze Pan, Penghui Yao, Jiashu Yuan, Chun Xia, Yicheng Zhao, Yongdan Li
Summary: A bi-functional catalytic perovskite LaNi0.5Co0.5O3 (LNCO) is utilized as the cathode in a high-efficiency Li-O2 battery with a molten nitrate salt electrolyte at 160 degrees C. This LNCO cathode exhibits stable low charge-discharge overpotential and high energy efficiency over 100 cycles. The discharge product, Li2O, has a porous and fluffy morphology, facilitating the transfer of oxygen and other intermediate species. Li2O as a discharge product enables a higher theoretical specific energy density compared to Li2O2 in ambient temperature Li-O2 batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Tian Gan, Hexuan Song, Xinqiang Fan, Ye Liu, Shouqing Liu, Yicheng Zhao, Yongdan Li
Summary: A Sn-doped Ce0.8Sm0.2O2_delta (SDC) supported Sn-Ni alloy anode was designed and prepared through a dual-modification strategy. The substitution of Sn improved the mobility of lattice oxygen in SDC, and Sn exsolves from the oxide phase to form intermetallic compounds with Ni after reduction. The composite anode showed unprecedented activity in the electrochemical oxidation of H2 and CH3OH, with high power densities achieved using these fuels. This work opens a new path for the design of high-performance SOFC anodes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xuelan Hou, Yicheng Zhao, Yongdan Li
Summary: The construction of Z-scheme graphitic carbon nitride-titanium dioxide nanotubes (C3N4-TNT) is beneficial for optimizing the band structure and improving the efficiency of photoelectrochemical water splitting cells. However, the narrow operating potential window of 0-1.23 VRHE limits the understanding of the C3N4-TNT electrode. This study applied a broader potential window of -0.5-2.5 VRHE to analyze the effect of external electrons and simulated sunlight on C3N4-TNT@Ti, revealing enhanced photocurrent density and potential for advanced water oxidation/reduction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Running Kang, Zirui Zhang, Feng Bin, Xiaolin Wei, Yongdan Li, Guoxing Chen, Xin Tu
Summary: The effects of catalyst support on the CO catalytic ignition performance and reaction pathways were investigated, and it was found that TiO2 or ZSM-5 supports promote copper dispersion and the oxidation process mainly occurs at the phase interface. The Cu and Ce interactions lead to the formation of solid solutions, which enhance the activity of individual copper sites and favor the ignition of CO at low temperatures. The Cu2+ species are reduced to form dicarbonyls, which also take part in the oxidation process.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Jie Zheng, Rui Xia, Congli Sun, Najma Yaqoob, Qianyuan Qiu, Liping Zhong, Yongdan Li, Payam Kaghazchi, Kangning Zhao, Johan E. ten Elshof, Mark Huijben
Summary: Fast and durable lithium storage in entropy-stabilized Fe0.4Ti1.6Nb10O28.8 (FTNO) is achieved by tuning entropy via Fe substitution. Increasing the entropy leads to reduced grain size and a shorter Li+ pathway along diffusion channels. The increased entropy also stabilizes the lithium intercalation channel by decreasing expansion along the a-axis.
Article
Chemistry, Multidisciplinary
Shibo Yuan, Peng Bai, Yi He, Jiafa Chen, Yicheng Zhao, Yongdan Li
Summary: Photocatalytic N-formylation of amines with CO2 is achieved using a black TiO2-supported Cu photocatalyst prepared through a solvothermal method. Reduction with H-2 results in the formation of Cu nanoparticles and oxygen vacancies on the surface of the photocatalyst, enhancing the photocatalytic activity. A 100% conversion and an 81% yield of N-methylformanilide are achieved after 9 hours of radiation. The amount of NaBH4 and the pressure of CO2 significantly affect the activity and selectivity of the photocatalytic process.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Applied
Qianyuan Qiu, Jilan Long, Penghui Yao, Jiaqi Wang, Xiang Li, Zheng-Ze Pan, Yicheng Zhao, Yongdan Li
Summary: Lithium oxygen battery (LOB) is a promising energy storage device for electric vehicles due to its high energy density, but its electrochemical performances are unsatisfactory. This article reviews the recent progress in cathode materials and reaction mechanism of LOBs. The principles and requirements for cathode materials are discussed, and the performance of LOBs with different cathode materials is described. Approaches to improve cathode performance and research trends on cathode catalyst are proposed.
Article
Materials Science, Ceramics
Zhi Yang, Jian Zhang, Bingxue Wu, Xin Zhao, Xuanlin Lu, Yicheng Zhao, Yongdan Li
Summary: A cobalt-free composite cathode composed of La0.6Sr0.4FeO3-& delta; phase and La1.2Sr0.8NiO4+& delta; phase was synthesized using self-assembly technology. The composite cathode exhibited excellent oxygen activity, electrical conductivity, and ionic conductivity, leading to the lowest polarization resistances at 700 degrees C in oxygen and air. The one-pot synthesized nanocomposite is a promising cathode material for protonic ceramic fuel cells.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Yihan Zhen, Cuijuan Zhang, Yongdan Li
Summary: By functionalizing with imidazole and grafting with an oligoether chain, a ferrocene derivative 1-ferrocenylmethyl-3-(2-(2-(2-methoxyethoxy)ethoxy)ethyl)imidazolium-bis(trifluoromethylsulfonyl)imide (FcMITEGTFSI) is designed. The imidazolium cationic group induces a positive shift in redox potential of the ferrocene core while ensuring the stability of the active species; the flexible oligoether side chain renders the molecule liquid at room temperature and miscible with acetonitrile solvent. The flow battery exhibits robust cycling stability, with an overall discharge capacity retention of approximately 95.5% after 200 cycles, corresponding to a capacity retention of approximately 99.98% per cycle at 25 mA cm(-2) with 0.1 M electrolyte.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Mingze Yang, Anna Lenarda, Sana Frindy, Yushuai Sang, Valtteri Oksanen, Adriano Bolognani, Lisa Hendrickx, Juho Helaja, Yongdan Li
Summary: This study investigates a metal-free route to synthesize biphenyls using a carbon catalyst, demonstrating that air-oxidized active carbon exhibits the best activity and the catalyst is highly recyclable. The mechanism of the reaction is proposed to be based on the redox cycle of the quinoidic groups on the carbon surface, and the addition of a catalytic acid is found to accelerate the reaction.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Energy & Fuels
Linzhe Zhao, Yongdan Li, Cuijuan Zhang
Summary: In this study, amorphous Co-Mn binary oxides loaded on porous carbon nanosheets were prepared and their composition, microstructure, and ORR/OER performance with different calcination temperatures were investigated. The amorphous CoMn2Ox supported on carbon nanosheets showed higher ORR/OER bifunctional electrochemical performance in terms of activity and stability. The rechargeable zinc-air battery with the amorphous CoMn(2)Ox on carbon nanosheets as air electrode achieved a peak power density of 89.6 mW cm(-2) and maintained stable operation for about 500 cycles at 10 mA cm-2. The ORR/OER bifunctional performance was closely related to the microstructure, oxidation states of Co/Mn species, and their corresponding proportions. Although there is still room for performance enhancement, this work provides insights into the development of high-performance and cheap ORR/OER bifunctional catalysts for rechargeable metal-air batteries by engineering the crystallinity of the metal oxides.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Najla Grioui, Amal Elleuch, Kamel Halouani, Yongdan Li
Summary: This study investigates the feasibility of using exhausted olive pomace biochar as a fuel in a direct carbon fuel cell. The results confirm the feasibility, with a maximum power density of 10 mW cm(-2) at 700 degrees C. The limited output of the fuel cell is attributed to the high ash content and low volatile matter content of the biochar.
C-JOURNAL OF CARBON RESEARCH
(2023)
Article
Chemistry, Physical
Qianyuan Qiu, Jiaqi Wang, Penghui Yao, Yongdan Li
Summary: In this study, a facile coprecipitation approach was used to synthesize a LaNi0.5Co0.5O3 perovskite oxide with a low annealing temperature, which was then utilized as the cathode material for a lithium-oxygen battery. The assembled battery exhibited superior electrochemical performance and stable operation.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.
