Article
Chemistry, Physical
Aliyah Alsharif, Natalie Smith, Elena F. Kozhevnikova, Ivan Kozhevnikov
Summary: The silica-supported zinc oxide catalyst exhibits both acid and dehydrogenation functionalities, making it an efficient bifunctional catalyst for the synthesis of p-Cymene from renewable monoterpene feedstock. The catalyst shows stable performance for over 70 hours without the co-feeding of hydrogen, providing high yields of p-Cymene under specific reaction conditions.
Review
Chemistry, Physical
Antonella Satira, Claudia Espro, Emilia Paone, Paolo Salvatore Calabro, Mario Pagliaro, Rosaria Ciriminna, Francesco Mauriello
Summary: Limonene, a renewable cyclic monoterpene obtained from citrus peel, has various applications such as nutraceuticals, antibacterials, and biopesticides, and serves as a starting substrate for building block chemicals. Despite its potential, achieving selective production of p-cymene through dehydrogenation remains a scientific and technological challenge.
Article
Chemistry, Physical
Aliyah Alsharif, Elena F. Kozhevnikova, Ivan Kozhevnikov
Summary: Cadmium oxide supported on silica is an efficient catalyst for the clean synthesis of p-cymene from cyclic monoterpenes. The reaction proceeds via acid-redox catalysis at the gas-solid interface, with monoterpenes isomerizing to p-menthadienes on acid sites of silica support, followed by dehydrogenation to p-cymene on oxo-metal sites of CdO. The catalyst exhibits highest efficiency among reported catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Applied
Teddy Roy, Julie Rousseau, Antoine Daudin, Gerhard Pirngruber, Benedicte Lebeau, Jean-Luc Blin, Sylvette Brunet
Summary: Mesostructured titania as a support for the CoMoS active phase enhances HDS activity and DDS selectivity, with temperature treatment significantly affecting catalyst activity. Higher activities are obtained after treatment at 380 degrees C, correlating with higher specific surface area and a semicrystalline anatase framework in the mesostructured TiO2 material.
Article
Plant Sciences
Umashankar Chandrasekaran, Siyeon Byeon, Kunhyo Kim, Seo Hyun Kim, Chan Oh Park, Ah Reum Han, Young-Sang Lee, Hyun Seok Kim
Summary: Climate change-related drought stress affects the physiology and biochemistry of eastern white pine, leading to changes in chlorophyll content, proline accumulation, antioxidant activity, root/shoot ratio, and synthesis of volatile organic compounds.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Chemistry, Physical
Hao Liu, Xian Li, Qiguang Dai, Hailin Zhao, Guangtao Chai, Yanglong Guo, Yun Guo, Li Wang, Wangcheng Zhan
Summary: The reducibility and surface acidity of Mn-Ti composite oxides were controlled by adjusting the Mn/Ti molar ratio, impacting their catalytic activity for the deep oxidation of vinyl chloride. It was found that the catalyst surface acidity played a decisive role in the oxidation process, while Lewis acidic sites from Ti species also influenced the catalytic activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Victor Deboos, Carla Calabrese, Jean-Marc Giraudon, Rino Morent, Nathalie De Geyter, Leonarda Francesca Liotta, Jean-Francois Lamonier
Summary: Cu (10 wt%) materials were prepared on silica nanotubes via two synthetic approaches, co-synthesis and wetness impregnation. The Cu-based silica nanotubes showed the best performance in toluene oxidation, with a lower T-50 (306 °C) compared to the reference catalyst (345 °C). The excellent catalytic properties were attributed to the finely dispersed copper (II) species on the surface of silica nanotubes.
Article
Chemistry, Applied
Bryan R. Moser, Michael A. Jackson, Kenneth M. Doll
Summary: The dehydration and isomerization of renewable perillyl alcohol to industrially useful p-cymene was achieved in high yield using para-toluenesulfonic acid catalyst. However, when applying the same parameters to other substrates, competing side reactions were observed due to the strong Bronsted acidity of the catalyst.
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
(2021)
Article
Chemistry, Applied
Weidong Zhang, Claude Descorme, Jose Luis Valverde, Anne Giroir-Fendler
Summary: Cu-Co mixed oxides were found to exhibit good catalytic performance in the oxidation of toluene, with Cu0.2Co showing the best performance. However, in propane oxidation, the activity of the catalysts decreased as the copper content increased due to the low intrinsic activity of CuO. Various factors affecting the oxidation reactions were studied, including the presence of CO2, water vapor and NO.
Article
Chemistry, Inorganic & Nuclear
Dharmalingam Sindhuja, Mayakrishnan Gopiraman, Punitharaj Vasanthakumar, Nattamai Bhuvanesh, Ramasamy Karvembu
Summary: A series of half-sandwich Ru(II) complexes containing acylthiourea ligand were reported with well-characterized analytical and spectroscopic methods. The catalytic ability of Ru complexes in the synthesis of quinoxaline compounds via transfer hydrogenation approach was evaluated, and an active homogeneous catalyst was heterogenized by supporting it on graphene oxide. The heterogeneous catalyst showed good reusability up to five cycles without any loss in activity.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2021)
Article
Engineering, Chemical
Paula Osorio-Vargas, Krishnamoorthy Shanmugaraj, Carla Herrera, Cristian H. Campos, Cecilia C. Torres, Francisca Castillo-Puchi, Luis E. Arteaga-Perez
Summary: In this study, Pd nanoparticles supported on natural halloysite were utilized as catalysts for the production of p-cymene from waste tire pyrolysis for the first time. Different acid-base properties were achieved by dispersing Pd NPs on the inner or outer surface of halloysite nanotubes, leading to higher selectivity and bifunctionality with PdHin than PdHout. Activation energies for waste tire conversion and p-cymene production were estimated under a kinetically controlled regime, providing valuable insights into the catalytic process.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
Jung-Hyun Park
Summary: The effect of H2O2 treatment on the catalytic activity of a PdO-based catalyst for methane oxidation was investigated. The results showed that the H2O2-treated catalysts exhibited improved catalytic activity in dry or water vapor conditions. The enhancement was attributed to increased surface exposure of PdO, facilitating reduction and desorption, as well as the formation of strong acid sites.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Environmental Sciences
Adrianna Kaminska, Joanna Srenscek-Nazzal, Jaroslaw Serafin, Piotr Miadlicki, Karolina Kielbasa, Agnieszka Wroblewska
Summary: In the era of ecology and careful care for the environment, it is important to use renewable raw materials of plant origin. Research on the use of waste plant biomass, such as producing activated carbons from food industry waste, is a rapidly developing direction. Carbons based on waste biomass offer environmentally friendly substitutes for catalysts in isomerization reactions, allowing for high conversion of organic raw materials and desired product selectivities.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Myeong Gon Jang, Sinmyung Yoon, Dongjae Shin, Hyung Jun Kim, Rui Huang, Euiseob Yang, Jihun Kim, Kug-Seung Lee, Kwangjin An, Jeong Woo Han
Summary: In this study, the activity and selectivity of oxide-supported metal catalysts were enhanced by controlling the catalyst's facet and doping methods. The WGSR activity of Pd supported on Cu-doped CeO2 (CDC) was found to synergistically increase, exceeding the sum of the effects of morphology and Cu doping. The effect of each tuning method on the activity was further investigated from a mechanistic perspective.
Article
Chemistry, Physical
Pedro Castro-Fernandez, Deni Mance, Chong Liu, Paula M. Abdala, Elena Willinger, Aurelio A. Rossinelli, Alexander I. Serykh, Evgeny A. Pidko, Christophe Coperet, Alexey Fedorov, Christoph R. Mueller
Summary: This study investigates the effect of H2 treatment on the structure, acidity, and catalytic activity of γ/β-Ga2O3 nanoparticle catalysts. The results show that the presence of the β-Ga2O3 phase increases the PDH activity of the catalysts, and H2 treatment enhances the catalytic activity for all three catalysts through different mechanisms.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Rafaela Gabriel, Sandra H. V. De Carvalho, Jose Leandro da Silva Duarte, Leonardo M. T. M. Oliveira, Dimitrios A. Giannakoudakis, Konstantinos S. Triantafyllidis, Jao I. Soletti, Lucas Meili
Summary: The global increase in energy demand, driven by population growth and socioeconomic development resulting from rapid industrialization and urbanization, has intensified dependence on energy resources and raised questions about their availability. This has highlighted the vulnerability of non-renewable fossil fuels. Biodiesel has been adopted as a mitigating solution to the problems caused by burning fossil fuels, due to its biodegradable, renewable, and non-toxic nature. The focus of recent studies has been on heterogeneous catalysts for biodiesel production, as economic and technological issues have been recognized in homogeneous reactions. Among the catalysts studied, layered double hydroxides (LDHs) have attracted attention for their adjustable properties related to the composition and synthesis methods, which are directly connected to the structural, morphological, and catalytic aspects of their oxides.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Kyriaki Kakamouka, Chrystalla Gavriel, Eleni D. Salonikidou, Dimitrios A. Giannakoudakis, Margaritis Kostoglou, Konstantinos S. Triantafyllidis, Eleni A. Deliyanni
Summary: The efficiency of deep desulfurization for commercial activated porous carbon and its chemically modified counterparts was evaluated through dynamic and batch experiments. The oxidation process affected the carbon's physicochemical features, resulting in controversial effects on desulfurization efficiency. The oxidized carbon showed slightly negative performance in column tests but positive performance in batch tests.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Ioannis D. Charisteidis, Pantelis N. Trikalitis, Konstantinos S. Triantafyllidis, Vasileios Komvokis, Bilge Yilmaz
Summary: Fluid Catalytic Cracking (FCC) is a key refining process for transportation fuel production and plays an increasingly important role in the petrochemical industry. Nickel is a challenging contaminant in FCC and its behavior at different stages on the catalyst surface is not well understood. This study aims to identify and quantify different phases of nickel in equilibrium FCC catalysts using a range of analytical techniques. The results show that powder X-ray diffraction is effective for quantitative determination of the nickel oxide phase, and boron-based technology can hinder the deleterious role of nickel in FCC operations.
Article
Chemistry, Multidisciplinary
Ioannis Nikolopoulos, George Kogkos, Vasiliki D. Tsavatopoulou, Eleana Kordouli, Kyriakos Bourikas, Christos Kordulis, Alexis Lycourghiotis
Summary: Two nickel alumina catalysts were synthesized by different methods and evaluated for their catalytic efficiency in the transformation of sunflower oil into green diesel. The catalyst prepared by co-precipitation showed higher efficiency due to its higher specific surface area and smaller nickel nanoparticle size compared to the catalyst prepared by wet impregnation. Increasing the activation temperature resulted in larger nickel nanoparticles and decreased catalytic efficiency. The optimized reaction conditions achieved complete transformation of sunflower oil and waste cooking oil into green diesel with high yield.
Article
Engineering, Chemical
Nikolaos Nikolopoulos, Eleana Kordouli, Labrini Sygellou, Kyriakos Bourikas, Christos Kordulis, Alexis Lycourghiotis
Summary: The promoting action of molybdenum species in high nickel loading Ni-ZrO2 co-precipitated catalysts was investigated. Mo addition nearly doubled the green diesel yield by accelerating the hydrodeoxygenation pathway. Increasing the activation temperature further enhanced the catalytic efficiency of the promoted catalysts, resulting in a 70.1% green diesel yield. The promoting action of molybdenum was attributed to the increase of specific surface area and the synergy between oxygen vacancies on the well-dispersed Mo-species and nickel surface sites.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
George Petropoulos, John Zafeiropoulos, Eleana Kordouli, Alexis Lycourghiotis, Christos Kordulis, Kyriakos Bourikas
Summary: The efficiency of Ni/TiO2 catalysts for renewable diesel production was evaluated. Two series of catalysts were synthesized and characterized using various physicochemical techniques. The yield towards renewable diesel was maximized over the catalyst with 50 wt.% Ni loading. The efficiency of the catalysts in green diesel production was influenced by the preparation method.
Review
Chemistry, Applied
Sotiris Lycourghiotis, Eleana Kordouli, Kyriakos Bourikas, Christos Kordulis, Alexis Lycourghiotis
Summary: This paper reviews the important contributions of metals and metal oxides as promoters in the production of green diesel using reduced nickel catalysts. The promotion effect includes accelerating green diesel production, shifting the reaction network to the dehydration pathway, reducing C-C hydrogenolysis and fragmentation of triglyceride side chains, and decreasing methanation. The promoting action is achieved through various mechanisms such as increasing the active surface of nickel, forming alloys, intermetallic compounds, and mixed oxides, as well as the synergy between nickel or Ni-Me hydrogenation sites and oxygen vacancies of the second metal oxide. The contribution of each mechanism depends on the type of promoter used.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ioannis Nikolopoulos, Eleana Kordouli, Nikolaos Mourgkogiannis, Hrissi K. Karapanagioti, Alexis Lycourghiotis, Christos Kordulis
Summary: This study aims to use biochars derived from residual biomass as supports for Ni-based catalysts. The biochars were prepared from espresso coffee residue (C) and rice husks (R) via pyrolysis, and were further treated with hot water, H3PO4 or H2SO4 solution, and NaOH solution. The obtained biochars had high surface areas and microporous structure. The most promising biochars were used as supports for Ni catalysts, and the addition of Mo significantly increased the hydrocarbon yield.
Article
Chemistry, Multidisciplinary
Amit Kumar Singh, Dimitrios A. A. Giannakoudakis, Michael Arkas, Konstantinos S. S. Triantafyllidis, Vaishakh Nair
Summary: In this study, composites of bismuth oxyhalide nanoparticles and lignin-based biochar were synthesized for the photocatalytic and adsorptive remediation of methyl orange dye (MO). The optimized conditions achieved 100% degradation of MO after 60 minutes of light exposure. The incorporation of biochar enhanced the photocatalytic performance of the BiOCl photocatalyst, making it a promising and eco-friendly nanomaterial for wastewater treatment.
Article
Chemistry, Multidisciplinary
Michael Arkas, Konstantinos Giannakopoulos, Evangelos P. Favvas, Sergios Papageorgiou, George V. Theodorakopoulos, Artemis Giannoulatou, Michail Vardavoulias, Dimitrios A. Giannakoudakis, Konstantinos S. Triantafyllidis, Efthalia Georgiou, Ioannis Pashalidis
Summary: Two different silica conformations, xerogels and nanoparticles, were tested for uranyl cation sorption at low pHs using dendritic poly (ethylene imine) as a mediator. The study investigated the effect of factors such as temperature, electrostatic forces, adsorbent composition, pollutant accessibility, and organic matrix properties to determine the optimal formulation for water purification. Through various techniques including spectroscopy, light scattering, porosimetry, TGA, and SEM, the results showed that both adsorbents exhibited extraordinary sorption capacities. Xerogels were cost-effective and could be used to create composite purification devices.
Article
Chemistry, Multidisciplinary
Dimitra Makarouni, Chara Dimitriadi Evgenidi, Christos Kordulis, Vassilios Dourtoglou
Summary: In this study, the mordenite catalyst TECH NOSA-H2 from Greek volcanic soils was used for synthesizing ethers and acetals from renewable materials. The yields of di-furfuryl ether and furfuryl ethyl ether achieved with TECH NOSA-H2 were 30% and 60% respectively, in 3 hours at 150°C. The catalyst also demonstrated high efficiency in synthesizing citral propylene glycol acetal and citral diethyl acetal, with 50% yields obtained in 20 minutes at mild temperatures. The active sites of TECH NOSA-H2 were found to be dominated by Bronsted acidity.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Materials Science, Composites
Dimitrios Gkiliopoulos, Dimitrios Bikiaris, Doukas Efstathiadis, Konstantinos Triantafyllidis
Summary: The study evaluated the reinforcing efficiency of SBA-15-type mesoporous silica as an additive in epoxy polymers. The effects of silica loading and its physicochemical characteristics on the properties of glassy and rubbery epoxy mesocomposites were examined. The addition of up to 6 wt.% silica improved the properties of glassy polymers, while up to 9 wt.% silica improved the properties of rubbery polymers.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Chemistry, Applied
George Petropoulos, John Zafeiropoulos, Eleana Kordouli, Labrini Sygellou, Christos Kordulis, Alexis Lycourghiotis, Kyriakos Bourikas
Summary: Research was conducted on reduced NiMo catalysts supported on titania for the transformation of vegetable oils to green diesel. The catalysts were prepared using the deposition-precipitation method and characterized by various techniques. The optimal catalyst formulation had a synergistic [Ni/(Ni+Mo)] atomic ratio of 0.99 and achieved high conversion yields of 65±2% for various crude oils.
Article
Chemistry, Multidisciplinary
Mariusz Barczak, Dorota Pietras-Ozga, Moaaz K. K. Seliem, Giacomo de Falco, Dimitrios A. A. Giannakoudakis, Konstantinos Triantafyllidis
Summary: Mesoporous silicas with different structural properties were synthesized by varying the time intervals between the addition of different silica monomers. One sample exhibited an unusual isotherm with two hysteresis loops and high pore volume. The materials were characterized and used as adsorbents and release platforms for diclofenac sodium, revealing differences in adsorption and release behavior.
Meeting Abstract
Plant Sciences
G. Papapanagiotou, M. Panou, U. Lortou, T. Piszter, S. Kavoukis, G. Iakovou, A. Margellou, G. Zalidis, K. Triantafyllidis, S. Gkelis
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)
