Article
Chemistry, Physical
Riikka Kupila, Katja Lappalainen, Tao Hu, Henrik Romar, Ulla Lassi
Summary: In this study, heterogeneous biomass-based activated carbon-supported metal oxide catalysts were prepared and tested for lactic acid production from glucose in aqueous solution. The modification of the carbon support by nitric acid treatment together with Sn and Al oxides led to an increase in lactic acid yield, but long-term use resulted in a decrease in catalyst selectivity to lactic acid due to the deposition of carbonaceous byproducts and leaching of Al oxides.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Riikka Kupila, Katja Lappalainen, Tao Hu, Anne Heponiemi, Davide Bergna, Ulla Lassi
Summary: The study showed that SnO2@AC catalyst was more active and selective in triose conversion to ethyl lactate, while ZnO@AC was more selective in glucose and hydrolysate conversion.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Environmental Sciences
Yegeng Sun, Wei Zhang, Qing Wang, Ning Han, Avelino Nunez-Delgado, Yue Cao, Weimeng Si, Fagang Wang, Shaomin Liu
Summary: A mesoporous carbon derived from beancurd was used as a support for Au@Pd@Pt core-shell catalysts, showing higher ORR activity, specific, and mass activities compared to commercial Pt/C catalyst. The sample exhibited excellent durability after 20000 cycles of rapid testing, indicating promising potential for environmental applications.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Shuai Ding, Hairong Zhang, Bo Li, Wenping Xu, Xuefang Chen, Shimiao Yao, Lian Xiong, Haijun Guo, Xinde Chen
Summary: The study focuses on the synthesis of gamma-valerolactone (GVL) from butyl levulinate (BL) hydrogenation using sulfonated activated carbon (SAC) supported SnRuB bifunctional catalysts. The optimal 20Sn1RuB/SAC catalyst showed high BL conversion and GVL selectivity, attributed to the active surface species and strong interaction between SnRuB active site and SAC support. The catalyst also exhibited excellent recyclability in six runs, making it a potential candidate for cost-effective and efficient BL hydrogenation to GVL.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Thermodynamics
Nerea Viar, Jesus M. Requies, Ion Agirre, Aitziber Iriondo, Cristina Garcia-Sancho, Pedro L. Arias
Summary: In this study, catalysts supported on biomass-derived carbon were used for the hydrogenolysis of HMF to produce DMF and DMTHF in a continuous flow reactor. The carbon-supported catalysts showed good activity and selectivity, outperforming commercial carbon-supported catalysts in terms of selectivity and stability.
Article
Energy & Fuels
Filipe Mateus, Paula Teixeira, Joseï M. Lopes, Carlos Henriques, Carmen Bacariza
Summary: Activated carbons derived from cork wastes were used as supports for CO2 methanation catalysts for the first time. The addition of CeO2 improved the catalytic performance of the Ni-based catalysts, showing higher CH4 yields compared to the catalyst without CeO2.
Article
Chemistry, Physical
Shenghong Dong, Mingzhe Chen, Jiarui Zhang, Jinzhu Chen, Yisheng Xu
Summary: The plasmonic photocatalyst Pd/g-C3N4 shows excellent catalytic activity in the photo-induced hydrogenation of biomass-based aldehydes under visible-light irradiation. The Pd atom is identified as the true catalytic active site, and the photo-promoted reduction mainly occurs through the effect of surface plasmon resonance induced by noble metal nanoparticles.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Engineering, Aerospace
Junyeong Jeong, Seongmin Rang, Vincent Mario Pierre Ugolini, Sejin Kwon
Summary: This study investigated various activated carbon (AC)-supported catalysts for H2O2 hybrid rockets to improve the hypergolicity of solid fuels. Among the studied catalysts, Pt/AC, Ru/AC, and Pt-Ru/AC exhibited the best hypergolicity.
Article
Agricultural Engineering
Le Kim Hoang Pham, Suwadee Kongparakul, Mingyue Ding, Guoqing Guan, Narong Chanlek, Prasert Reubroycharoen, Dai-Viet N. Vo, Nguyen Van Cuong, Chanatip Samart
Summary: Catalytic pyrolysis is a cost-effective technology for producing high-quality biofuels. The development of catalysts plays a crucial role in controlling the reaction pathways and producing specific products. In this study, palm kernel shells were pyrolyzed with a melamine-doped activated-carbon-supported Ni2P catalyst. The catalyst showed great potential for the selective production of phenolic compounds.
BIOMASS & BIOENERGY
(2023)
Article
Nanoscience & Nanotechnology
Yung Wei Hsiao, Darien K. Nguyen, Kewei Yu, Weiqing Zheng, Panagiotis Dimitrakellis, Dionisios G. Vlachos
Summary: We use a nonthermal, He/O-2 atmospheric plasma as an efficient method of surface functionalization for activated carbons. Plasma treatment rapidly increases the surface oxygen content of the activated carbon, introducing a diverse range of carbonyl and carboxyl functionalities. This surface functionalization improves the catalytic synthesis, reducing particle size, suppressing agglomerate formation, and increasing metal dispersion, leading to improved yield of biofuel replacement compound.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Zaira Ruiz-Bernal, Maria Angeles Lillo-Rodenas, Maria del Carmen Roman-Martinez
Summary: Ru catalysts supported on commercial and biomass-derived activated carbons were prepared and used for hydrogenation of levulinic acid to produce gamma-valerolactone. The catalysts with more acidic supports showed better catalytic properties, achieving high LA conversion and selectivity to GVL even in mild temperature conditions.
Article
Chemistry, Analytical
Yuanyuan Ge, Yuzhe Wang, Guozhong Xu, Zhigang Fang, Jinfeng Bai, Chao Li
Summary: Activated carbon with micropore and mesopore structure was prepared using soybean straw as a carbon source. A composite material PMo12/SSAC-OP was obtained by introducing redox-active H3PMo12O40 into SSAC-OP. The composite material exhibited both electric double layer capacitance and pseudocapacitance characteristics, with high specific capacitance and good cycling stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Simi Li, Yan Huang, Lingkui Zhao, Junfeng Zhang
Summary: This study presents a synthetic protocol for the preparation of oxygen-functionalized activated carbon supported vanadium catalysts. The catalysts exhibit enhanced acid and redox properties, leading to improved catalytic activity for low-temperature selective catalytic reduction. In-situ experiments reveal multiple adsorption and reaction mechanisms on the catalyst surface, which are significant for the understanding of the catalytic process.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Analytical
Shasha Liu, Gang Wu, Lei Zhang, Yong Huang, Jianbin Zhou, Shu Zhang
Summary: Catalytic pyrolysis of pine sawdust was utilized to produce valuable alkylphenol compounds by introducing surface active groups, such as metal iron species and oxygen-containing groups, to strengthen the biochar-based catalyst. The presence of these active sites promoted the conversion of pyrolytic intermediates into phenolic compounds during catalytic pyrolysis. The deactivated catalyst could be easily regenerated and showed a good selectivity for phenol production.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Energy & Fuels
Huanran Wang, Xianchun Li, Mingming Zhu, Zhezi Zhang, Junzhi Wu, Dongke Zhang
Summary: The study found that increasing Fe-0 dispersion can improve catalytic activity in the presence of CO, while increasing Fe loading is more important in the absence of CO. Catalyst deactivation is mainly attributed to NO oxidation of Fe-0 and activated carbon support, as well as Fe sintering and agglomeration.
Article
Chemistry, Applied
Francisco J. Garcia-Mateos, Ramiro Ruiz-Rosas, Juana Ma Rosas, Jose Rodriguez-Mirasol, Tomas Cordero
Summary: Phosphorus-containing carbon fibers prepared by electrospinning of lignin solutions exhibit excellent acid properties and catalytic activity, achieving good performance in isopropanol decomposition and other reactions.
Article
Chemistry, Applied
J. J. Ternero-Hidalgo, M. Daturi, G. Clet, P. Bazin, M. A. Banares, R. Portela, M. O. Guerrero-Perez, J. Rodriguez-Mirasol, T. Cordero
Summary: Simultaneous operando Raman and transmission FTIR spectroscopic measurements were used to study the structure-activity relationships of V-Zr-O catalysts during propane oxidative dehydrogenation. The combination of both spectroscopies allowed the identification of reaction intermediates and provided structural information about the catalyst. The results suggested a Mars-van Krevelen mechanism and showed higher activity of bridging oxygen sites than terminal V--O bonds.
Article
Chemistry, Physical
Javier Torres-Linan, Ramiro Ruiz-Rosas, Juana Maria Rosas, Jose Rodriguez-Mirasol, Tomas Cordero
Summary: A Zr-loaded P-containing biomass-derived activated carbon (ACPZr) has been found to exhibit high selectivity towards dimethyl ether (DME) in methanol dehydration reactions at 500 degrees C, with a yield of more than 20% for over 24 hours. A kinetic model was developed to account for the inhibition of water and catalyst deactivation by coke. Results showed that water had a reversible competitive adsorption effect, while coke formation could be attributed to a formaldehyde intermediate.
Article
Energy & Fuels
Jose Palomo, Miguel A. Rodriguez-Cano, Jose Berruezo-Garcia, Jose Rodriguez-Mirasol, Tomas Cordero
Summary: In this study, a structured catalyst consisting of submicrometric fibrillar ZrO2 fibers with well-defined ZSM-5 zeolite aggregates was prepared by electrospinning technique. The catalyst showed high activity for the synthesis of DME and light olefins via methanol dehydration, and it could be easily structured inside a fixed-bed reactor, overcoming the limitations of mass and heat transfer. The selectivity to DME and light hydrocarbons could be controlled by tuning the zeolite loading in the catalyst.
Article
Energy & Fuels
Heresh Rayej, Mohammad Reza Vaezi, Behzad Aghabarari, Ramiro Ruiz-Rosas, Juana M. Rosas, Jose Rodriguez-Mirasol, Tomas Cordero
Summary: This work demonstrates the preparation of oxygen reduction reaction catalysts by pyrolysis of amino acid functionalized graphene oxide, with Histidine showing promising results in enhancing capacitance, conductivity, and ORR activity.
Article
Chemistry, Applied
Sandra Pioquinto-Garcia, J. Raziel Alvarez, Alan A. Rico-Barragan, Sylvain Giraudet, Juana Maria Rosas-Martinez, Margarita Loredo-Cancino, Eduardo Soto-Regalado, Victor M. Ovando-Medina, Tomas Cordero, Jose Rodriguez-Mirasol, Nancy E. Davila-Guzman
Summary: We demonstrate the potential of metal-organic framework (MOF) composite fibers produced by electrospinning for removing D4 siloxane from gaseous solutions. The fibers are based on polyacrylonitrile (PAN) and a microporous aluminum-based MOF called DUT-4. The best dispersion on the fiber surface is achieved using coaxial electrospinning with a DUT-4:PAN ratio of 1:1.4. The Al-MOF fiber composite shows higher adsorption capacity and faster adsorption kinetics compared to individual DUT-4 crystals.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Physical
M. J. Valero-Romero, F. J. Garcia-Mateos, Freek Kapteijn, J. Rodriguez-Mirasol, T. Cordero
Summary: Cobalt-containing lignin-based fibers were synthesized for low-temperature Fischer-Tropsch synthesis. The fibers heat-treated at 500℃ showed the best catalytic performance with selectivity of 75% and 60%.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Polymer Science
Al Mamun, Francisco Jose Garcia-Mateos, Lilia Sabantina, Michaela Kloecker, Elise Diestelhorst, Ramiro Ruiz-Rosas, Juana Maria Rosas, Jose Rodriguez-Mirasol, Tomasz Blachowicz, Tomas Cordero
Summary: In this study, electrospun carbon fiber electrodes were prepared for use as catalysts in the oxygen reduction reaction. The results showed that these catalysts exhibited good activity and selectivity.
Article
Engineering, Environmental
M. Garcia-Rollan, F. J. Garcia-Mateos, R. Ruiz-Rosas, J. M. Rosas, J. Rodriguez-Mirasol, T. Cordero
Summary: Alkalis in lignosulfonate enable the easy preparation of sustainable MgO-containing carbon catalysts by carbonization and gasification. Different carbon spheres with varied properties were obtained through different temperatures of treatment. The carbon spheres showed high selectivity to acetone as a catalyst for 2-propanol decomposition, and CO2-activated carbon spheres exhibited the highest activity and selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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.
