Article
Energy & Fuels
Miriam Gonzalez-Castano, Svetlana Ivanova, Miguel Angel Centeno, Theophiles Ioanides, Harvey Arellano-Garcia, Jose Antonio Odriozola
Summary: This study evaluates the functional modifications induced by Zr and Fe as dopants in Pt/CeO2-MOx/Al2O3 catalysts to improve water gas shift performance. Iron and zirconia dopants significantly influence the activity and reaction mechanisms of Pt/ceria catalysts, with a synergistic effect observed when both metals are combined, leading to higher CO conversion rates and catalytic activity.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Maria Mihet, Monica Dan, Lucian Barbu-Tudoran, Mihaela D. Lazar
Summary: Ni/oxide-SiO2 catalyst samples were prepared with Ni, MgO, CeO2, and La2O3 as supplementary oxides. Catalysts were characterized and functionally evaluated, with Ni/LaSi showing the best catalytic activity in CO2 methanation reaction.
Article
Chemistry, Physical
Penghui Yan, Xinxin Tian, Eric M. Kennedy, Michael Stockenhuber
Summary: This study investigates the hydrodeoxygenation (HDO) of anisole over Ni/SiO2 catalysts, and explores the correlation between catalyst properties and reaction mechanism. The results show that the Ni/SiO2 catalyst exhibits strong hydrogenolysis activity for anisole, promoting the formation of condensed-ring products.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Bin Zhang, Israel E. Wachs
Summary: A series of supported ReOx catalysts were investigated to identify the unique surface anchoring sites on oxide supports responsible for activating the surface ReO4 sites for propylene metathesis. The specific oxide support was found to control the number of activated sites and propylene metathesis activity, revealing that the oxide support is a potent ligand for the surface ReOx sites.
Article
Chemistry, Physical
Tiancheng Pu, Adhika Setiawan, Bar Mosevitzky Lis, Minghui Zhu, Michael E. Ford, Srinivas Rangarajan, Israel E. Wachs
Summary: This study systematically investigates the nature of surface oxygen species on a silver powder catalyst and their reactivity with ethylene. The experimental results demonstrate that the silver surface is covered by a thin oxide layer during the oxidation treatment and ethylene oxidation process. It is found that Ag4-O2 is the active oxygen species on the oxidized silver surface.
Review
Chemistry, Multidisciplinary
Yongbiao Hua, Younes Ahmadi, Ki-Hyun Kim
Summary: This comprehensive review summarizes the recent progress in transition metal oxide (TMO)-based thermocatalysts for the removal of formaldehyde (FA). The key factors affecting the catalytic activity of TMO-based thermocatalysts towards FA are discussed, including exposed crystal facets, alkali metal/nitrogen modification, type of precursors, and alkali/acid treatment. The performance of TMO-based composite catalysts is found to be superior to mono- and bi-metallic TMO catalysts, owing to their abundant surface oxygen vacancies and enhanced FA adsorptivity. The challenges and future prospects for TMO-based catalysts in the catalytic oxidation of FA are also discussed.
Article
Chemistry, Physical
Bin Zhang, Soe Lwin, Shuting Xiang, Anatoly Frenkel, Israel E. Wachs
Summary: The activity of catalysts supported by surface ReOx is controlled by the number and type of ligands on the oxide support, while the overall activity is influenced by the number of activated sites.
Review
Chemistry, Physical
Jiayu Zheng, Wenkang Zhao, Liyun Song, Hao Wang, Hui Yan, Ge Chen, Changbao Han, Jiujun Zhang
Summary: This paper comprehensively reviews the progress in developing MnOx-based catalysts for indoor formaldehyde removal, including catalytic oxidation mechanisms, catalytic deactivation, catalyst regeneration, and integrated application. The technical challenges in developing such catalysts are analyzed and possible research directions are proposed.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Dan Chen, Huayao Shen, Yue Zhang, Xuejun Zou, Aili Guan, Yulin Wang
Summary: This study explored the impact of cerium on the catalytic oxidation performance of formaldehyde over Ag/MCM-41 catalysts, with cerium-modified MCM-41 mesoporous materials synthesized at different ratios. The results showed that Ag/Ce-MCM-41 catalyst with Si:Ce = 1:1 ratio achieved complete formaldehyde oxidation above 130 degrees Celsius. The enhanced interaction between Ag and Ce, as well as Ce and SiO2, due to the addition of cerium to MCM-41, contributed to improved catalytic activity.
Article
Engineering, Environmental
Oana Grad, Angela M. Kasza, Alexandru Turza, Monica Dan, Lucian Barbu-Tudoran, Mihaela D. Lazar, Maria Mihet
Summary: This study presents a novel and feasible method to obtain Ni catalysts for CO2 methanation using sacrificial MIL-53(Al). The sacrificial MIL-53(Al) was obtained through a less time and energy-consuming hydrothermal synthesis, without compromising its structural and textural properties. The subsequent Ni catalysts derived from MIL-53(Al) exhibited an ordered mesoporous structure, uniform distribution of Ni nanoparticles, and enhanced H2 and CO2 adsorption capacity compared to the reference catalyst (Ni/Al-(com)).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Yang Liu, Wei Shi, Xu Sun, Zhengfeng Xie
Summary: In this study, a novel dopamine-based polytetrahydroisoquinoline derivative was synthesized by a metal-free Pictet-Spengler/Mannich cascade reaction using dopamine and formaldehyde as starting substrates. The prepared PDT showed effective iodine adsorption performance and was used as a support for silver nanoparticles, exhibiting good catalytic activity and cycling stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhihao Xu, Kai-Hang Ye, Yuying Zheng, Zhiting Liang, Tongxin Tang, Ying Zhang, Xiaohui He, Hongbing Ji
Summary: Formaldehyde oxidation at room temperature with low-cost catalysts is a significant research direction in environmental governance. In this study, a low-cost Ce/Na-ZSM-5 catalyst with excellent performance was developed, demonstrating atomic dispersion for the oxidation of indoor formaldehyde at low temperature. The optimized Ce/Na-ZSM-5 catalyst exhibits high formaldehyde removal efficiency (95% at room temperature) and maintains stable performance with 90% removal after 100 hours of testing. Furthermore, a reasonable reaction mechanism of formaldehyde catalytic oxidation is proposed based on in situ DRIFT spectra and DFT calculation. This work provides a new approach for designing efficient catalysts for complete formaldehyde oxidation.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Environmental
Xiaotong Li, Guangzhi He, Jinzhu Ma, Xufei Shao, Yingfa Chen, Hong He
Summary: The study demonstrates that Ag-Mn catalysts prepared by impregnation method with high Ag utilization exhibit excellent O-3 decomposition activity compared to other catalysts. The unique Ag-O-Mn bonds formed between Ag and manganese vacancies improve the dispersion of Ag nanoparticles, leading to enhanced O-3 decomposition performance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Mariia Merko, Sara Delsing, G. Wilma Busser, Martin Muhler
Summary: The non-oxidative dehydrogenation of methanol to formaldehyde offers potential advantages including the production of anhydrous formaldehyde and valuable hydrogen by-products. Supported GaOx catalysts showed promising catalytic performance, with fumed SiO2 identified as the more suitable support. The loading of Ga and coke deposition affected the formaldehyde production rate and the generation of by-products.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Gang Yan, Yefan Gu, Peiyu Qin, Wen Deng, Meina Lin, Chunna Huang, Yitong Ning, Hongliang Hu, Liguang Xiao
Summary: The photocatalytic degradation of formaldehyde is an ideal solution for indoor air pollution. In this study, a ternary heterojunction photocatalyst K-C3N4/Ag/Ag3PMo12O40 was synthesized and it exhibited significantly improved photocatalytic activity compared to other catalysts. The structure and mechanism of the photocatalyst were investigated, providing insights for the design of new and efficient photocatalysts for environmental applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Guoqiang Gan, Shiying Fan, Xinyong Li, Zhongshen Zhang, Zhengping Hao
Summary: Volatile organic compounds (VOCs) are significant pollutants in the environment due to their toxicity, volatility, and poor degradability. Controlling their emission is urgent, and efficient technologies for removal and recovery are of great importance. Adsorption and membrane separation processes have been extensively studied and favored for their industrial prospects.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Guoqiang Gan, Fengquan Xu, Xinyong Li, Shiying Fan, Chunpeng Bai, Qidong Zhao, Moses O. Tade, Shaomin Liu, Wenjun Zhang
Summary: The influence of crystal phase on the electrocatalytic performance and active sites of CuFe2O4 spinel for the electrochemical dechlorination of 1,2-dichloroethane is studied. A higher activity and ethylene selectivity are observed for the cubic phase compared to the tetragonal phase, indicating the significant enhancement of electrocatalytic performance by the cubic crystal structure. The octahedral Fe atom on the surface of cubic CuFe2O4(311) is identified as the active site responsible for ethylene production with an energy barrier of 0.40 eV. This work highlights the importance of crystal phase engineering for optimizing electrocatalytic performance and provides an efficient strategy for the development of advanced electrocatalysts.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Zhiyuan Liu, Shiying Fan, Xinyong Li, Zhaodong Niu, Jing Wang, Chunpeng Bai, Jun Duan, Moses O. Tade, Shaomin Liu
Summary: We demonstrate a composite photocatalyst for nitric oxide conversion with a Cu-Fe alloy, graphitic carbon nitride (g-C3N4), and ZnIn2S4. The superior photocatalytic performance of 6.45-fold that of g-C3N4 was confirmed. The delay effect on charge recombination was observed through time-resolved photoluminescence, and heterojunction establishment was attributed to the hole-trapping ability of ZnIn2S4. The combined effects of the Cu-Fe alloy were confirmed by NO-specific adsorption and conversion experiments, and the active species involved were examined via electron spin resonance. Density functional theory calculations revealed the molecular mechanisms of photocatalytic conversion of NO to NO3-. Therefore, g-C3N4|ZnIn2S4|CuFe has potential for sustainable and efficient pollutant conversion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Multidisciplinary Sciences
Yijing Liu, Rankun Zhang, Le Lin, Yichao Wang, Changping Liu, Rentao Mu, Qiang Fu
Summary: In this study, stripe-like MnO(001) and grid-like Mn3O4(001) monolayers were constructed on Pt(111) substrate to investigate hydrogen spillover. The experimental results showed that hydrogen diffused unidirectionally along the stripes on MnO(001), while it had an isotropic pathway on Mn3O4(001). The dynamic surface imaging in H-2 atmosphere revealed that hydrogen diffused 4 times faster on MnO than on Mn3O4, which was attributed to the one-dimensional surface-lattice-confinement effect. Theoretical calculations indicated that a uniform and medium O-O distance favored hydrogen diffusion while low-coordinate surface O atom inhibited it. This work illustrated the surface-lattice-confinement effect of oxide catalysts on hydrogen spillover and provided a promising route to improve the hydrogen spillover efficiency.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yamei Fan, Fei Wang, Rongtan Li, Conghui Liu, Qiang Fu
Summary: In this study, gamma-alumina supports with different hydroxyl (OH) contents were prepared by calcinating pseudo-boehmite at different temperatures. The effect of surface OH on the oxidative redispersion process of supported Ag nanoparticles was investigated. The results show that the dispersion capacity of Ag species is thermodynamically determined by the surface OH contents, while the dispersion rate is kinetically limited by the OH densities. Both OH contents and OH densities play critical roles in the redispersion of metal particles and can be utilized to manipulate CO oxidation reactions catalyzed by Ag.
Article
Chemistry, Physical
Zhaodong Niu, Shiying Fan, Xinyong Li, Jun Duan, Aicheng Chen
Summary: In this study, a new catalyst was developed for efficient wastewater treatment and high-value ammonia generation. The catalyst exhibited high Faradaic efficiency and yield at specific potentials, and the reaction was promoted by the interface effect. The experimental results and theoretical calculations provided insights into the catalytic mechanism and product formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Zhiyuan Liu, Shiying Fan, Xinyong Li, Zhaodong Niu, Jing Wang, Chunpeng Bai, Jun Duan, Moses O. Tade, Shaomin Liu
Summary: In this paper, single atom Cu/Ta3N5/CdIn2S4 S-scheme hierarchical polyhedrons (SACu/TN/CIS SHPs) were successfully synthesized and their photocatalytic activity improvement was investigated. The synergistic effect of SACu and S-scheme was confirmed to exhibit excellent charge separation and reduction of energy barriers during ammonium production reaction. The NH3 production rate of SACu/TN/CIS SHPs under light conditions was remarkably 43.6 times higher than that of Ta3N5. This study not only proposes an efficient catalyst under visible light, but also provides an advantageous solution for photocatalytic nitrate reduction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Zhiyu Yi, Le Lin, Xuda Luo, Yanxiao Ning, Qiang Fu
Summary: Interfacial interaction between supported catalysts and the underlying substrate is crucial in catalysis. This study demonstrates that the interaction between Cr2O7 and Au can be weakened by applying an electric field, allowing for manipulation of the individual clusters. However, surface alloying with Cu enhances the interaction and makes the manipulation difficult.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Applied
Chao Wang, Xianjin Li, Guiming Zhong, Caixia Meng, Shiwen Li, Guohui Zhang, Yanxiao Ning, Xianfeng Li, Qiang Fu
Summary: In-depth understanding of the electrolyte-dependent intercalation chemistry in batteries is crucial for high-performance battery development. This study investigated the effect of electrolyte coordination structure on intercalation processes in the Al/graphite battery using operando XPS and X-ray diffraction. The weaker anion-cation interaction in the HMI-based electrolyte led to a lower atomic ratio of co-intercalated N to intercalated Al, resulting in lower ionic diffusion rate, capacity, and cycling performance. These findings emphasize the critical role of electrolyte coordination structure in (co-)intercalation chemistry.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Physical
Yijing Liu, Le Lin, Liang Yu, Rentao Mu, Qiang Fu
Summary: The search for efficient non-noble-metal catalysts for selective oxidation reactions is important but often hampered due to controversial origin of the selectivity, especially for oxide-catalyzed reactions. In this study, high-pressure surface imaging techniques and theoretical calculations were used to identify spatially separated active sites for O-2 activation and H-2 adsorption on an ultrathin Mn3O4 surface, enabling selective oxidation of CO over H-2. The study sheds light on the atomic-level understanding of surface structure-dependent selective oxidation reactions on oxide catalysts.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Cui Dong, Rentao Mu, Rongtan Li, Jianyang Wang, Tongyuan Song, Zhenping Qu, Qiang Fu, Xinhe Bao
Summary: The interaction between oxide catalyst and oxide support is crucial in catalytic reactions. The construction of chemically bonded oxide-oxide interface by deposition of Co3O4 onto ZnO powder inhibits the complete reduction of Co3O4 and maintains a metastable CoOx state, resulting in high selectivity towards CO in CO2 hydrogenation reaction. On the other hand, physically contacted oxide-oxide interface formed by mechanical mixing promotes the reduction of Co3O4 and enhances CO2 conversion and selectivity towards CH4 through the remote spillover of dissociated hydrogen species.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Penglei Wang, Shiying Fan, Xinyong Li, Jun Duan, Dongke Zhang
Summary: The impact of the piezoelectric effect on the photocatalytic production of hydrogen peroxide (H2O2) over graphitic carbon nitride (CN) was investigated by modulating its molecular structure. The results showed that the photocatalytic activity of CN, CN-P, CN-OF was enhanced by approximately 1.40, 1.46, and 1.51 times due to the piezoelectric effect, respectively, while CN-CA exhibited a 6-fold decrease in activity. Various techniques were employed to explore the active sites, piezoelectric polarization, and charge separation, revealing that the piezoelectric effect's influence on photocatalytic H2O2 production over CN is determined by multiple factors.
Article
Chemistry, Physical
Changping Liu, Le Lin, Hao Wu, Yijing Liu, Rentao Mu, Qiang Fu
Summary: Tuning the oxide/metal interface is crucial for enhancing the performance of many catalytic reactions. However, catalytic oxidation at the interface between non-reducible oxide and metal is challenging due to the reluctance of non-reducible oxides to lose oxygen. This study investigates CO oxidation at the ZnO/Au(111) interface using a ZnO monolayer film as an inverse catalyst and demonstrates that oxygen intercalation underneath the ZnO film significantly enhances the oxidation reaction.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Yu Qin, Shiying Fan, Jinsuo Gao, Moses O. Tade, Shaomin Liu, Xinyong Li
Summary: Cu-doped CoMn2O4 catalysts showed excellent catalytic performance in NO reduction by CO, with Cu0.3Co0.7Mn2O4 achieving 100% NO conversion and 80% N2 selectivity at 250 degrees C. Structural analysis revealed that the introduced Cu replaces some Co in tetrahedral coordination, resulting in a strong synergistic effect between different metals.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Environmental Sciences
Jinyun Luo, Jincheng Mu, Xinyong Li, Baojun Liu
Summary: With the development of metallurgy, chemical manufacturing, and mining, lead pollution in water, especially from battery industries, has become a serious environmental problem. In this study, a highly efficient removal of Pb2+ from wastewater was achieved using MoO2@N-doped hollow carbon sphere (MoO2@ NHCS) anodes in a capacitive deionization (CDI) process. The MoO2@NHCS electrodes exhibited a high adsorption capacity of 202.14 mg/g for Pb2+ in a 50 ppm solution (pH = 6 and U = 1.2 V). Additionally, the electrodes showed selectivity towards Pb2+ even in the presence of Na+ and other heavy metal ions. The selective removal was attributed to the transformation of octahedral MoO2 into tetrahedral [MoO4]2-, which could effectively trap Pb2+ to form PbMoO4.
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.
