Review
Chemistry, Physical
Shiqun Wu, Lingzhi Wang, Jinlong Zhang
Summary: The study presents the prospect and challenges of photocatalytic non-oxidative coupling of methane conversion under mild conditions. Theory predictions and experimental results provide important guidance for the design of efficient and stable photocatalysts.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS
(2021)
Review
Chemistry, Multidisciplinary
Allison M. Arinaga, Morgan C. Ziegelski, Tobin J. Marks
Summary: Research on the catalytic oxidative coupling of methane (OCM) using alternative oxidants such as N2O, CO2, and S-2 is still in its early stages, with unique advantages and challenges compared to oxygen (O-2) as the oxidant. This area has not been extensively reviewed, despite the renewed interest in OCM due to the abundance of shale gas resources.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
Victor Abdelsayed, Dushyant Shekhawat, Robert S. Tempke
Summary: The increase in zeolite surface acidity led to higher formation of C2 and aromatic hydrocarbons in microwave reactions, resulting in less carbon production with higher thermal stability. Additionally, carbon deposits started forming inside the micropores under microwave, leading to heterogeneous filamentous carbon whiskers compared to homogeneous spherical carbon deposits on conventionally reacted samples.
Article
Chemistry, Organic
Yinpeng Wang, Mingming Zhao, Jingke Peng, Hongxia Zheng, Heng-Ying Xiong, Guangwu Zhang
Summary: The first Pd(0)-catalyzed synthesis of aryl-methylene ethers from hydrobenzoxazoles (hydrothiazoles) using dichloromethane (DCM) as the C1 feedstock is reported. This protocol demonstrates a broad substrate scope (38 examples) and wide tolerance to functional groups. The aryl-methylene ether adducts have been successfully coupled with isocyanate to provide bis-iminoisoindolinones. In this reaction, DCM serves as a twofold electrophile, undergoing double C-Cl bond cleavage to react with hydrobenzoxazoles.
Article
Chemistry, Inorganic & Nuclear
Reike Clauss, Saral Baweja, Dmitri Gelman, Evamarie Hey-Hawkins
Summary: A series of novel heterobimetallic Pd-II/M-II complexes were synthesized and exhibited a cooperative effect in catalyzing coupling reactions, leading to improved catalytic activity and selectivity for the formation of various Z-alkenes. The homogeneous nature of the catalytically active species was also demonstrated in the study.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Hao Zhang, Aleksei Bolshakov, Raghavendra Meena, Gustavo A. Garcia, A. Iulian Dugulan, Alexander Parastaev, Guanna Li, Emiel J. M. Hensen, Nikolay Kosinov
Summary: Non-oxidative coupling of methane enables the direct production of ethylene from natural gas. By using siliceous [Fe]zeolites with MFI and CHA topologies, high selectivity to ethylene and ethane (>90% for MFI and >99% for CHA) was achieved. Deactivated [Fe]zeolites can be regenerated by burning coke in air. In situ X-ray absorption spectroscopy and photoelectron photoion coincidence spectroscopy were employed to investigate the reaction mechanism, revealing the formation of methyl radicals as intermediates and proposing a reaction network leading to polyaromatic species over [Fe]MFI.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Anna Zanina, Vita A. Kondratenko, Henrik Lund, Jianshu Li, Juan Chen, Yuming Li, Guiyuan Jiang, Evgenii Kondratenko
Summary: This study shows that MnOx-Na2WO4/SiO2 is not the necessary catalyst to achieve high selectivity in the oxidative coupling of methane. Experimental results reveal that M2WO4/SiO2 materials perform similarly to MnOx-Na2WO4/SiO2 in terms of selectivity and conversion. An alternative concept is proposed, suggesting that the activity and product selectivity of M2WO4/SiO2 are determined by the interaction between lattice oxygen of M2WO4 and adsorbed oxygen species from the gas phase.
Article
Engineering, Environmental
R. S. Postma, P. S. F. Mendes, L. Pirro, A. Banerjee, J. W. Thybaut, L. Lefferts
Summary: The interplay between catalytic activation of methane on Fe (c) SiO2 and gas-phase free radical methane coupling under non-oxidative conditions is analyzed by mechanistic modeling and experiments. The model validates the significant contribution of gas-phase reactions responsible for methane conversion and the low-activity induction period in gas-phase methane pyrolysis can be overcome by catalytic activation. Gas-phase reactions determines the selectivity distribution while catalytic reaction only influences the activity of the system.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Surya Pratap Singh, Akihiko Anzai, Satoru Kawaharasaki, Akira Yamamoto, Hisao Yoshida
Summary: In this study, photocatalytic conversion of methane to ethane and hydrogen was successfully achieved using gallium oxide catalyst at room temperature. The addition of Pd cocatalyst improved the activity of the catalyst, leading to higher formation rates of ethane and hydrogen.
Article
Chemistry, Applied
Zixiao Liu, Sichao Cheng, Emily Schulman, Weiqi Chen, Dionisios G. Vlachos, Yuying Shu, Dat T. Tran, Dongxia Liu
Summary: This study prepared a vitreous silica-supported iron (Fe/SiO2-V) catalyst by fusion of quartz silica and fayalite, and investigated its physicochemical properties and performance in direct non-oxidative methane coupling (NMC). Compared to cristobalite support, the vitreous silica support with disordered Si-O bonds and structural defects enabled better iron dispersion and more vital metal-support interaction. The Fe/SiO2-V catalyst exhibited a shorter induction period in methane activation and produced less coke during NMC.
Article
Chemistry, Applied
Yixiao Wang, Bingwen Wang, Sagar Sourav, Rakesh Batchu, Zongtang Fang, M. Ross Kunz, Gregory Yablonsky, Eranda Nikolla, Rebecca Fushimi
Summary: In this study, the influence of surface and gas phase oxygen on the selective conversion of CH4 to C2H4 over the Mn-Na2WO4/SiO2 catalyst was investigated using Temporal Analysis of Products (TAP) and steady-state experiments. It was found that methane activation predominantly occurs via a short-lived, transient surface oxygen species on the catalyst, and there is competition between this species to form CO or methyl radicals on the surface. The concentration of the transient surface oxygen species was found to significantly impact the oxidative coupling of methane performance.
Article
Chemistry, Applied
Hao Zhang, Yaqiong Su, Nikolay Kosinov, Emiel J. M. Hensen
Summary: In this study, a series of Mo-doped CeO2 samples with isolated Mo sites were prepared and investigated for the non-oxidative coupling of methane. The catalyst exhibited high selectivity, with 98% yield of value-added C2 hydrocarbons (ethane and ethylene). The isolated Mo-oxo species in the catalyst were reduced to Mo (oxy-)carbide species, which acted as the active sites for methane activation.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Seraphine B. X. Y. Zhang, Quentin Pessemesse, Zachariah J. Berkson, Alexander P. Van Bavel, Andrew D. Horton, Pierre-Adrien Payard, Christophe Coperet
Summary: Li/MgO is a prototypical material for oxidative coupling of methane (OCM) with high C-2 selectivity. This study demonstrates that Li/MgO is also an effective catalyst for non-oxidative coupling of methane (NOCM). The presence of Li favors the formation of magnesium acetylide (MgC2), which promotes C-C bond formation and enhances C-2 selectivity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Svetlana Pavlova, Yulia Ivanova, Sergey Tsybulya, Yurii Chesalov, Anna Nartova, Evgenii Suprun, Lyubov Isupova
Summary: The methane oxidative coupling (OCM) is a potential method for producing C-2 hydrocarbons. In this study, a Sr2TiO4 catalyst was synthesized using mechanochemical activation (MA) and annealing methods. The OCM activity was found to be correlated with surface Sr concentration and surface oxygen amount.
Article
Engineering, Environmental
Tsegay Gebrekidan Gebreyohannes, Sung Woo Lee, Seung Ju Han, Yong Tae Kim, Seok Ki Kim
Summary: This study developed a detailed mechanism for non-oxidative coupling of methane (NOCM), consisting of 1,112 species and 106,877 gas-phase reactions. A reduced mechanism with 178 species and 9,695 reactions was obtained, focusing on four target products. The evaluation of methane conversion and species concentration revealed the significant impact of temperature and pressure.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Swen Zerebecki, Soma Salamon, Joachim Landers, Yuke Yang, Yujin Tong, Eko Budiyanto, Daniel Waffel, Maik Dreyer, Sascha Saddeler, Tim Kox, Stephane Kenmoe, Eckhard Spohr, Stephan Schulz, Malte Behrens, Martin Muhler, Harun Tueysuez, R. Kramer Campen, Heiko Wende, Sven Reichenberger, Stephan Barcikowski
Summary: This study investigates the effects of cation occupancy on oxidation catalysis by utilizing pulsed laser defect engineering. By gradually altering the cation occupancy and studying its impact on the oxidation reaction of cinnamyl alcohol, the importance of octahedral Co3+ sites and the feasibility of pulsed laser processing in changing cation occupancy and crystallographic defect density are demonstrated.
Article
Engineering, Chemical
Joscha Priessen, Fernando Barths, Malte Behrens, Heyko Juergen Schultz
Summary: This study analyzed the impact of the length of axially segmented lifters on the process behavior of industrial rotary drums, particularly on axial solid transport. Experimental measurements showed a significant influence of lifter length on mean residence times, drum capacity, and axial dispersion, with different flow patterns observed. Novel design recommendations for lifter length and the installation of front side walls at the lifter blades were derived from the findings.
Article
Chemistry, Physical
Carlos Alberto Chagas, Martin Schmal
Summary: The effect of copper oxide species on the CuO-NiO/CeO2 structure and its influence on the preferential CO oxidation in H-2 excess reaction were investigated. The addition of Cu+ species increased the active sites and reduced the temperature of CO2 formation or selectivity. The stabilizing effect of carbonyl species inhibited the oxidation of H-2 and contributed to the superior selectivity towards CO2 at low temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Electrochemistry
Ann Cathrin Brix, Maik Dreyer, Adarsh Koul, Moritz Krebs, Anna Rabe, Ulrich Hagemann, Swapnil Varhade, Corina Andronescu, Malte Behrens, Wolfgang Schuhmann, Dulce M. Morales
Summary: Mitigating high energy costs in sustainable H-2 production via water electrolysis is crucial for commercial viability. One approach is to investigate low-cost OER catalysts and explore alternative anode reactions to reduce overpotential and generate value-added products. Non-noble metal-based perovskites, such as LaFe1-xCoxO3, show promise as catalysts with structure-activity relationships observed for OER, iPOR, and GOR reactions.
Article
Chemistry, Physical
Maik Dreyer, Ulrich Hagemann, Markus Heidelmann, Eko Budiyanto, Nicolas Cosanne, Klaus Friedel Ortega, Sharif Najafishirtari, Nils Hartmann, Harun Tuysuz, Malte Behrens
Summary: Oxidation reactions play a significant role in the industry, and mixed Co and Fe containing oxides are considered as promising substitutes for noble-metal-based catalysts due to their lower cost and higher thermal stability. Performing oxidation catalysis in the liquid phase can prevent total oxidation, and adding water vapor to the gas stream can bridge the gap between the gas and liquid phases. The study on nanocasted Co3-xFexO4 spinels reveals that low amounts of Fe are beneficial for the activity, but under wet conditions, competitive adsorption has a negative effect on the activity at lower temperatures during heating.
Article
Environmental Sciences
Auta Narjara de Brito Soares, Karina Tamiao C. Roseno, Reinaldo Giudici, Martin Schmal
Summary: This study investigated the effect of CO2 on the performance of nickel supported on LaFeO3 perovskite catalysts in the TRM process. The results showed that CO2 enhanced the hydrogen selectivity of the tri-reforming process compared to the partial oxidation reaction.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Anna Rabe, Maximilian Jaugstetter, Felix Hiege, Nicolas Cosanne, Klaus Friedel Ortega, Julia Linnemann, Kristina Tschulik, Malte Behrens
Summary: A computer-controlled microemulsion-assisted co-precipitation method is established to control the pore size of catalysts for the electrochemical oxygen evolution reaction. It is found that when the pore size reaches a certain threshold, the overpotential increases significantly and the oxygen release mechanism changes. These findings are of great importance for the development of better catalysts.
Article
Nanoscience & Nanotechnology
Tobias Falk, Eko Budiyanto, Maik Dreyer, Julia Bueker, Claudia Weidenthaler, Malte Behrens, Harun Tueysuez, Martin Muhler, Baoxiang Peng
Summary: A series of transition-metal-substituted mesoporous cobalt oxide catalysts were synthesized and applied in the selective oxidation of 2-propanol. Copper and nickel substitutions were found to be beneficial for the catalytic activity, while chromium, manganese, and iron substitutions were detrimental.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Chemical
Martin Schmal, Rubens W. S. Lima, Thiago L. R. Hewer, Rita M. B. Alves
Summary: This study investigates the hydrogenation processes of bio-oils using different catalysts and supports. The results show that the SBA-15 catalysts exhibit higher activity and better performance than the alumina catalyst. The temperature also plays an important role in the conversion of guaiacol and anisole, with higher conversions observed at 300 degrees C. The Ni-Mo/SBA-15 catalyst at 200 degrees C shows the best results for the HDO deoxygenation of the guaiacol and anisole mixture (96.5%).
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Benjamin Mockenhaupt, Philipp Schwiderowski, Jelena Jelic, Felix Studt, Martin Muhler, Malte Behrens
Summary: The active site of the industrially used Cu/ZnO catalyst for methanol formation is still controversial. Ammonia has been used as a probe molecule and it was found to inhibit methanol synthesis in CO2-containing synthesis gas. In this study, an industrial-type Cu/ZnO/Al2O3 catalyst was used to investigate poisoning effects. Injection of trimethylamine (TMA) and ammonia during steady-state methanol synthesis in a CO2/CO/H2 synthesis gas reversibly poisoned methanol formation, with ammonia showing stronger poisoning effect than TMA. DFT calculations provided a mechanism for ammonia poisoning, suggesting activation of ammonia on adsorbed oxygen or hydroxyl groups, followed by reaction with CO2 to form a stable carbamate on the active site.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Engineering, Chemical
Alberth Renne Gonzalez Caranton, Martin Schmal, Noemi Raquel Checca Huaman, Jose Carlos da Silva Pinto
Summary: This study prepares bimetallic PdCu catalysts supported on modified ZrO2 with Ti and Al using sol-gel and sonochemical methods. The catalysts exhibit higher activity in the synthesis of vinyl acetate. Characterization results show bimetallic species and distorted alloys dispersed onto the support. In situ reaction analysis reveals the formation of palladium acetate monomers and mono and bidentate intermediates, suggesting their involvement in vinyl acetate formation. The interaction between PdCu and the supports promotes the exposure of PdCu species, enhancing the catalytic performance.
MACROMOLECULAR REACTION ENGINEERING
(2023)
Article
Electrochemistry
Bhawana Kumari, Michael Braun, Steffen Cychy, Ignacio Sanjuan, Gereon Behrendt, Malte Behrens, Martin Muhler, Corina Andronescu
Summary: In this work, the electrooxidation of solketal (SOR), acetal-protected glycerol, is explored over Cu-Co hydroxycarbonates to promote the formation of glycerol-derived C3 products and to limit Cu leaching from the catalyst. The competition between oxygen evolution reaction (OER) and SOR was evaluated, and the solketal de-acetalization as a function of potential was studied. The solketal/OH- ratio was found to affect the reaction selectivity.
Article
Chemistry, Multidisciplinary
Julian Klein, Laura Kampermann, Benjamin Mockenhaupt, Malte Behrens, Jennifer Strunk, Gerd Bacher
Summary: The Tauc plot is a widely used method for determining the optical gap of amorphous semiconductors. It has also been modified to study direct and indirect interband transitions in (poly-) crystalline semiconductors. Despite its popularity, the Tauc plot should be used with caution due to the variability in electronic structure.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Benjamin Mockenhaupt, Jan Konrad Wied, Sebastian Mangelsen, Ulrich Schuermann, Lorenz Kienle, Joern Schmedt Auf der Guenne, Malte Behrens
Summary: The preparation of Al-doped ZnO via thermal decomposition of crystalline precursors was studied, with a focus on kinetic effects on solubility limits. The promoting effect of Al3+ on methanol synthesis catalyst system was discussed. The synthesis of Al-doped zinc oxides was inspired by the industrial synthesis of the methanol synthesis catalyst via a co-precipitated crystalline precursor. The aluminium speciation and solubility limit were determined through calcination of precursors with varying aluminium contents, showing advantageous conditions to suppress crystalline side-phases and achieve uniform distribution of aluminium in the solid.
DALTON TRANSACTIONS
(2023)
Article
Environmental Sciences
Camila Emilia Kozonoe, Vinicius Modolo Santos, Martin Schmal
Summary: This study investigated the performance of catalysts based on Ni and Fe nanoparticles selectively deposited on carbon nanotubes before and after dry methane reforming. The results showed that the nanotube structure was maintained even after acid treatment and high-temperature calcination. The catalysts exhibited high activity in dry methane reforming reactions, indicating their potential in this application.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
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)
