Article
Multidisciplinary Sciences
Xiaoyang Huang, Ouardia Akdim, Mark Douthwaite, Kai Wang, Liang Zhao, Richard J. Lewis, Samuel Pattisson, Isaac T. Daniel, Peter J. Miedziak, Greg Shaw, David J. Morgan, Sultan M. Althahban, Thomas E. Davies, Qian He, Fei Wang, Jile Fu, Donald Bethell, Steven McIntosh, Christopher J. Kiely, Graham J. Hutchings
Summary: This study demonstrates that the reaction rate can be almost doubled by separating the gold and palladium components in bimetallic carbon-supported catalysts. The enhancement is attributed to the coupling of separate redox processes occurring at isolated gold and palladium sites.
Article
Physics, Applied
Alexander Large, Jake Seymour, Wilson Quevedo Garzon, Kanak Roy, Federica Venturini, David C. Grinter, Luca Artiglia, Emily Brooke, Martha Briceno de Gutierrez, Agnes Raj, Kevin R. J. Lovelock, Roger A. Bennett, Tugce Eralp-Erden, Georg Held
Summary: Near ambient pressure x-ray photoelectron spectroscopy (NAP-XPS) was used to study the chemical states of alumina-supported monometallic Pd and bimetallic Pd-Pt nanocatalysts under methane oxidation conditions. The presence of Pt was found to be linked to Pd oxidation and catalyst activity under stoichiometric reaction conditions, while under oxygen-rich conditions, the behavior was less clear. However, adding Pt in place of Pd still showed benefits for complete oxidation of methane.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jiayi You, Ian Manners, Hongjing Dou
Summary: The redox activity of poly(ferrocenylsilane)-based polymer allows for the successful preparation of various noble metal nanoparticles. In this study, Pd nanoparticles were in situ prepared using a redox-active platform of poly(ferrocenylmethylethylthiocarboxylpropylsilane) micelles, resulting in PFC/Pd nanocomposites with uniform dispersion of Pd nanoparticles at the surface of PFC nanospheres. The PFC/Pd NCs showed significant catalytic activity in the reduction process of 4-nitrophenol, highlighting their potential as a composite nanocatalyst, with PFC micelles serving as an ideal platform for nanocatalysts.
Article
Engineering, Environmental
Joseph Brindle, Michael M. Nigra
Summary: The selective oxidation of methane is a challenging process, but AuPd nanoparticles have shown promise in activating methane at moderate temperatures and pressures. Through experimental studies, the formation of different surface intermediates and their relationship with selectivity and activity have been explored. It has been hypothesized that water and copper oxide can facilitate the selective oxidation of methane. The results indicate that AuPd catalysts are more active than monometallic Au and Pd catalysts in the presence of water, and the unprotonated formate can increase the methane oxidation rate. Additionally, copper oxide improves the selectivity of methane towards CO but decreases the overall methane consumption.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
M. Roger, L. Artiglia, A. Boucly, F. Buttignol, M. Agote-Aran, J. A. van Bokhoven, O. Krocher, D. Ferri
Summary: Ambient pressure X-ray photoelectron spectroscopy (APXPS) is used to characterise the surface structure of heterogeneous catalysts. By collecting consecutive APXPS spectra during the periodic perturbation of a catalyst, the time resolution and signal-to-noise ratio of photoemission spectra can be improved. Through phase sensitive analysis of the averaged time-resolved spectra, the formation/consumption dynamics of various species and their reactivity to gas switches can be studied with unprecedented precision.
Article
Chemistry, Inorganic & Nuclear
Jordan Santiago Martinez, Jaime Mazario, Silvia Gutierrez-Tarrino, Carmen Galdeano-Ruano, Jose Gaona-Miguelez, Marcelo E. Domine, Pascual Ona-Burgos
Summary: Alcohol oxidation is an important industrial organic reaction. Pd, Pt, and Au supported nanoparticles have traditionally been the best catalysts. In recent years, the research community has been developing strategies for synthesizing carbon-supported Pd/Au bimetallic nanoparticles to enhance activity and selectivity.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Lazar Rakocevic, Svetlana Strbac, Irina Srejic
Summary: The HER was examined on various glassy carbon-supported Au and PdAu electrodes in acid solution, with the 30minPd/10minAu/GC electrode showing the best catalytic activity. This electrode, consisting of 48% Pd and 65% Au, with the total coverage of the GC substrate with PdAu islands of 70%, exhibited remarkable high activity and stability, making it a promising catalyst for HER in acid solution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Lesia Piliai, Peter Matvija, Thu Ngan Dinhova, Ivan Khalakhan, Tomas Skala, Zdenek Dolezal, Oleksii Bezkrovnyi, Leszek Kepinski, Mykhailo Vorokhta, Iva Matolinova
Summary: In this study, the metal-substrate interaction and species transformation during CO oxidation on CeO2(111) surface were investigated. It was found that the interaction between gold nanoparticles and peroxo oxygen species formed on ceria step edges resulted in the formation of ionic gold species. Moreover, the addition of O2 led to the rapid growth of Au particles and the formation of large particles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Theo Faverge, Bruno Gilles, Antoine Bonnefont, Frederic Maillard, Christophe Coutanceau, Marian Chatenet
Summary: The mechanisms of oxidation of glucose, gluconic acid, and sorbitol on gold, platinum, and palladium are investigated using cyclic voltammetry, differential electrochemical mass spectrometry, and in situ Fourier transform infrared spectroscopy. The nature of the reactant significantly influences the onset of the oxidation reaction, with glucose's anomeric function oxidized at low potentials on all three surfaces, while gluconic acid and sorbitol poison the surface at low potentials. Different reaction pathways are observed based on the metal surface, and gold features the best activity, selectivity, and specificity for glucose oxidation into gluconate at low potentials. The study highlights the dependence of the mechanism on reactant, catalyst, and potential.
Article
Chemistry, Physical
Theo Faverge, Bruno Gilles, Antoine Bonnefont, Frederic Maillard, Christophe Coutanceau, Marian Chatenet
Summary: The oxidation mechanisms of glucose, gluconic acid, and sorbitol on gold, platinum, and palladium surfaces were studied using cyclic voltammetry, differential electrochemical mass spectrometry, and in situ Fourier transform infrared spectroscopy. The nature of the reactant influenced the onset of the oxidation reaction, with glucose being oxidized at low potentials on all three surfaces, while gluconic acid and sorbitol exhibited poisoning effects. The metal surface also influenced the reaction pathways, with glucose oxidation being initiated through the partial dissociative adsorption of glucose on all three surfaces. Gold demonstrated the highest activity, selectivity, and specificity for glucose oxidation to gluconate at low potentials. The study reveals a reactant, catalyst, and potential-dependent mechanism.
Article
Chemistry, Physical
Caitlin M. Crombie, Richard J. Lewis, David Kovacic, David J. Morgan, Thomas E. Davies, Jennifer. K. Edwards, Martin Skov Skjoth-Rasmussen, Graham J. Hutchings
Summary: This study demonstrates that the in-situ production of H(2)O(2) by AuPd nanoparticles can catalyze the oxidation of cyclohexane to form KA oil under conditions where activity is limited when using molecular O-2, with no loss in catalytic activity observed upon re-use. The effect of key reaction parameters, including reaction temperature, catalyst mass and H-2:O(2) ratio, are evaluated.
Article
Chemistry, Multidisciplinary
Igor A. Chetyrin, Andrey Bukhtiyarov, Igor P. Prosvirin, Valerii Bukhtiyarov
Summary: The study found that a decrease in oxygen concentration leads to a sharp increase in catalytic activity of the bimetallic Pt-Pd catalyst during low-temperature oxidation of methane, causing the catalyst to transition from a high-activity state to a low-activity state due to the partial reduction/oxidation of the active component. Both platinum and palladium participate in the methane oxidation reaction.
MENDELEEV COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Silvia Nuti, Adriaïn Fernandez-Lodeiro, Lidia E. Chinchilla, Ana B. Hungria, Jose-Luis Capelo-Martinez, Carlos Lodeiro, Javier Fernandez-Lodeiro
Summary: This study presents a simple method for fabricating Au@Pd bimetallic branched nanoparticles, which allow for tunable optical response, using polyallylamine-stabilized branched AuNPs as template cores for Pd overgrowth. The concentration of PdCl4(2-) and ascorbic acid (AA) can be manipulated to alter the palladium content, enabling the growth of a Pd shell up to approximately 2 nm thick. The presence of palladium on the surface of gold nanoparticles enhances their catalytic properties, as demonstrated through a comparison of nanoenzymatic activity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Chen Wang, Wei Gao, Xinhao Wan, Bin Yao, Wenjing Mu, Jie Gao, Qiangang Fu, Dan Wen
Summary: The study proposed a three-dimensional hierarchical noble metal aerogel with abundant sites and channels to enhance electrocatalytic performance and reduce usage. Novel Pd aerogels were prepared through in situ electrochemical activation of PdOx aerogels, showing great potential for fuel cell anodic electrocatalysis.
Article
Multidisciplinary Sciences
Xiaohui Zhang, Zhihu Sun, Rui Jin, Chuwei Zhu, Chuanlin Zhao, Yue Lin, Qiaoqiao Guan, Lina Cao, Hengwei Wang, Shang Li, Hancheng Yu, Xinyu Liu, Leilei Wang, Shiqiang Wei, Wei-Xue Li, Junling Lu
Summary: Core-shell bimetallic nanocatalysts have been widely studied in heterogeneous catalysis. In this study, Au@Pd core-shell catalysts were investigated and it was found that a large Au core with a thin Pd shell is crucial for achieving optimum benzyl alcohol adsorption and high catalytic activity. A series of Au@Pd/SiO2 catalysts with different core sizes and shell thicknesses were fabricated, and it was observed that the activity increased with core size but varied nonmonotonically with shell thickness. The findings reveal the importance of conjugated dual particle size effect in bimetallic catalysis.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Andrea Merenda, Samantha A. Orr, Yang Liu, Blanca Hernandez Garcia, Amin Osatiashtiani, Gabriel Morales, Marta Paniagua, Juan A. Melero, Adam F. Lee, Karen Wilson
Summary: In this study, a dual-catalyst bed configuration was developed to achieve efficient conversion of levulinic acid into gamma-Valerolactone (GVL). By utilizing sulfated zirconia (SZ) and ZrO2/SBA-15 as the Bronsted and Lewis acid catalysts, respectively, high conversion and selectivity were achieved in the esterification and hydrogenation reactions. The dual-bed system showed significantly higher productivity compared to the individual catalysts or their physical mixture.
Article
Chemistry, Multidisciplinary
P. Rajapaksha, R. Orrell-Trigg, D. Shah, S. Cheeseman, K. B. Vu, S. T. Ngo, B. J. Murdoch, N. R. Choudhury, H. Yin, D. Cozzolino, Y. B. Truong, A. F. Lee, V. K. Truong, J. Chapman
Summary: Antimicrobial resistance is a global health challenge, which requires innovative nanomaterials and antimicrobial strategies. In this study, a broad-spectrum antimicrobial nanomaterial combining light-responsive ZnO nanoparticles and reduced graphene oxide was developed for water depollution. The nanocomposite demonstrated strong antimicrobial efficacy against methicillin-resistant Staphylococcus aureus, Escherichia coli, and Salmonella typhimurium bacteria, and also showed potential for photocatalytic degradation of dye.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Sasha Yang, Binbin Qian, Yuan Wang, Kenji Taira, Qiaoqiao Zhou, Karen Wilson, Adam F. Lee, Lian Zhang
Summary: In this study, the reductive thermal processing of iron oxide catalyst derived from fly ash waste was investigated. The resulting catalyst showed enhanced activity for the ketonization reaction of acetic acid due to the introduction of surface oxygen vacancies and acid-base sites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Energy & Fuels
Gabriel Morales, Marta Paniagua, Daniel de la Flor, Maria Sanz, Pedro Leo, Clara Lopez-Aguado, Hector Hernando, Samantha A. Orr, Karen Wilson, Adam F. Lee, Juan A. Melero
Summary: Mesoporous silica-supported Zr-MOF-808 catalysts were synthesized and tested for the aldol condensation of furfural and methyl isobutyl ketone to bio-jet fuel precursors. The addition of Zr-MOF-808 nano-crystals to silica scaffolds resulted in well-dispersed Zr species with strong Lewis acidity. The Zr-MOF-808/silica hybrid materials exhibited higher condensation activity compared to unsupported Zr-MOF-808, and the textural properties of the silica support played a significant role in the catalytic performance.
Article
Chemistry, Multidisciplinary
Joao Otavio Mendes, Andrea Merenda, Karen Wilson, Adam Fraser Lee, Enrico Della Gaspera, Joel van Embden
Summary: The growth of (001) oriented antimony chalcogenide thin films can be controlled by tuning the substrate nanostructure, which is crucial for enhancing the performance of these films.
Review
Chemistry, Physical
Hamidreza Arandiyan, Putla Sudarsanam, Suresh K. Bhargava, Adam F. Lee, Karen Wilson
Summary: Biomass is a renewable energy source that is being increasingly utilized due to concerns about climate change caused by fossil fuel consumption. Waste biomass-derived fuels and chemicals offer a solution to reduce reliance on fossil fuels and achieve "Net Zero 2050 CO2 emissions" with environmental, health, and economic benefits. This review focuses on the use of perovskite oxide catalysts for biomass valorization, discussing their structure-reactivity relationships in various reactions. The study highlights the prospects and challenges for the broader application of perovskite oxide catalysts in biomass valorization.
Article
Chemistry, Multidisciplinary
Sabina Siles-Quesada, Christopher M. A. Parlett, Alexander C. Lamb, Jinesh C. Manayil, Yang Liu, Jim Mensah, Hamidreza Arandiyan, Karen Wilson, Adam F. Lee
Summary: Researchers successfully synthesized an ordered macroporous KIT-6 material with 370nm macropores, a face-centered cubic Ia3d structure, and 5nm mesopore channels. After functionalization, this material allows rapid diffusion and esterification of fatty acids. Compared with traditional mesoporous PrSO3H/KIT-6, the esterification rate of fatty acids increased by 5 times, and it also showed a 33% enhancement compared with ordered macroporous PrSO3H/SBA-15.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Environmental
Naif Raja, Gloria M. Monsalve-Bravo, Yusuf Valentino Kaneti, Jim Mensah, Karen Wilson, Adam F. Lee, Muxina Konarova
Summary: Thermal pyrolysis of organic components in municipal solid waste (MSW) offers a scalable route to liquid fuels, but requires deep insight into thermochemistry and kinetics. This study investigates the (catalytic) pyrolysis of a model MSW feedstock using thermogravimetric analysis (TGA) and kinetic modeling. Catalytic pyrolysis is sensitive to the catalyst:feedstock mass ratio, and selecting the appropriate heating rate is crucial for catalyst selection and process optimization.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Energy & Fuels
Prince J. J. Sagayaraj, Ashil Augustin, Mariyappan Shanmugam, Brahmari Honnappa, Thillai Sivakumar Natarajan, Karen Wilson, Adam F. Lee, Karthikeyan Sekar
Summary: This review discusses the sustainable production of solar fuels through reduction of molecular CO2 using photocatalysts, emphasizing the importance of this approach for controlling global warming. The unique properties of graphene quantum dots (GQD), such as enhanced solar light absorption and high photocatalytic efficiency, are highlighted. Additionally, the challenges and future outlook of GQD-based photocatalytic systems for solar fuels production are presented.
Article
Chemistry, Multidisciplinary
Jiajia Zhao, Yuan Wang, Hamidreza Arandiyan, Anita M. D'Angelo, Aaron Seeber, Daksh Shah, Rachel A. Caruso, Ivan S. Cole, Yunxia Yang, Karen Wilson, Renata Lippi, Adam F. Lee
Summary: We demonstrate how subtle changes in a mixed phase zirconia support induce large changes in catalyst activity and selectivity. Ru/Sn0.2Zr0.8O2 catalyst exhibited similar structrue and metal ion distribution as Ru/ZrO2, but XRD evidence showed new crystalline phases where Sn substituted for Zr. Operando infrared spectroscopy identified linear surface CO* as a catalytic spectator, and Sn0.2Zr0.8O2 promoted CO2 decomposition, favoring a reverse water gas shift pathway.
MATERIALS TODAY CHEMISTRY
(2023)
Correction
Chemistry, Physical
Vannia C. dos Santos-Durndell, Lee J. Durndell, Mark A. Isaacs, Adam F. Lee, Karen Wilson
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Physical
Vannia C. C. dos Santos-Durndell, Lee J. J. Durndell, Mark A. A. Isaacs, Adam F. F. Lee, Karen Wilson
Summary: Despite its significance in aqueous phase reactions and those wherein water is a by-product, the hydrophobicity of catalysts is often neglected. In this study, we synthesized WOx/ZrOx impregnated periodic mesoporous organosilicas (PMOs) with varying organic framework content. The incorporation of phenyl groups into the framework of mesoporous SBA-15 silica imparted surface hydrophobicity and tuned the solid acidity, leading to excellent turnover frequencies (TOFs) for the esterification reactions. The hydrophobic, solid acid catalysts showed superior activity and stability compared to the hydrophilic catalysts, making them suitable for aqueous phase synthesis.
SUSTAINABLE ENERGY & FUELS
(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.
