Article
Engineering, Environmental
Javier Remon, Marina Casales, Jesus Gracia, Maria S. Callen, Jose Luis Pinilla, Isabel Suelves
Summary: This study investigated the hydrodeoxygenation of lignocellulosic bio-oil over a carbon-neutral Mo2C/CNF catalyst, finding significant effects of temperature, initial pressure, reaction time, and catalyst/bio-oil ratio on conversion efficiency and product fractionation. Higher temperature, pressure, and appropriate catalyst dosage can achieve higher proportions of upgraded products and liquid biofuels from bio-oil.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Multidisciplinary
Lu Qu, Xia Jiang, Zihao Zhang, Xiang-gang Zhang, Guo-yong Song, Hua-lin Wang, Yuan-ping Yuan, Yu-long Chang
Summary: This article reviews the model compounds, catalysts, and equipment involved in the hydrodeoxygenation (HDO) of bio-oils, aiming to summarize the progress in the utilization of the HDO process and provide useful insights for the efficient practical application of bio-oils.
Article
Chemistry, Physical
Anthony D. Anderson, Michael P. Lanci, J. Scott Buchanan, James A. Dumesic, George W. Huber
Summary: Catalytic activity tests were conducted on a NiMoSx/Al2O3 catalyst to investigate the hydrodeoxygenation of glycerol and other aliphatic oxygenates. The results showed that sulfided NiMo catalyst exhibited higher C-C cleavage activity, and the addition of H2S could decrease the deactivation rate of the catalyst.
Article
Chemistry, Physical
Daria Ryaboshapka, Thomas Len, Pascal Bargiela, Mimoun Aouine, Christophe Geantet, Valerie Briois, Laurent Piccolo, Pavel Afanasiev
Summary: This study investigates the ultradispersion characteristics of MoS(x) catalysts on different supports. It is found that the support materials significantly affect the structure and temperature evolution of MoS(x). The sulfidation process involves the formation of oxysulfide and MoS(3)-like intermediates, which then transform into MoS(x) clusters. Compared to MoS2 nanoslabs, the coordination numbers of Mo in ultradispersed clusters decrease and the Mo-S and Mo-Mo distances shorten. Characterizations such as STEM-ADF confirm the prevalence of few-atom clusters and single-atom species in the catalysts. The activity per Mo atom in the thiophene hydrodesulfurization reaction varies with MoS(x) dispersion, with the sequence being Mo/carbons > Mo/TiO2 > Mo/Al2O3 & AP > Mo/SiO2 according to XAS measurements.
Review
Biochemistry & Molecular Biology
Yanfan Yang, Xuan Xu, Haodong He, Dan Huo, Xiaoyun Li, Lin Dai, Chuanling Si
Summary: The depletion of oil resources and environmental problems caused by fossil energy usage have led to the search for alternative energy sources, with bio-oil being a promising option. However, bio-oil cannot be directly utilized due to its high proportion of oxygenated compounds with low calorific value and poor thermal stability. Catalytic hydrodeoxygenation (HDO), with various catalyst systems like noble/non-noble metal catalysts, porous organic polymer catalysts, and polar solvents, is an effective method to refine oxygenated compounds from bio-oil. This review discusses the HDO process, different catalytic materials, mechanisms, and future challenges and opportunities for bio-oil upgradation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Green & Sustainable Science & Technology
Athanasios Dimitriadis, Loukia P. Chrysikou, George Meletidis, George Terzis, Milos Auersvald, David Kubicka, Stella Bezergianni
Summary: This study investigated the upgrading of pyrolysis bio-oil through mild hydrotreatment, finding that the longest catalyst life was achieved under specific operating conditions. Furthermore, several properties of the initial bio-oil were improved during the upgrading process.
Article
Energy & Fuels
Xing Zhang, Jingfeng Wu, Lingjun Zhu, Shurong Wang
Summary: A novel strategy was proposed to produce diesel-like liquid fuel from lignin-derived bio-oil and plant/animal oil through hydrodeoxygenation-in situ esterification. The utilization of both aromatic units and -OCH3 groups of lignin was achieved. Model compounds, guaiacol and lauric acid, successfully produced cyclohexyl laurate and methyl laurate, satisfying the biodiesel standard. The yield of esters reached 112.5 mol % with nearly complete conversion of guaiacol. The presence of an additional -OCH3 group hindered the formation of cyclohexanol while increasing the yield of methanol. Lignin-derived dimers were also efficiently converted into diesel-like liquid fuel rich in esters and cycloalkanes.
Article
Agricultural Engineering
A. Dimitriadis, D. Liakos, U. Pfisterer, M. Moustaka-Gouni, D. Karonis, S. Bezergianni
Summary: This study found that hydrotreated pyrolysis oil can be miscible with different petroleum streams, and in some cases can even improve fuel characteristics, potentially allowing for its integration in oil refineries.
BIOMASS & BIOENERGY
(2021)
Article
Chemistry, Applied
Poulami Roy, Hossein Jahromi, Tawsif Rahman, Jonas Baltrusaitis, El Barbary Hassan, Allen Torbert, Sushil Adhikari
Summary: This study explores the synergistic effect of blending pyrolysis oil with triglycerides for hydrotreatment using different catalyst supports. It is found that biochar-supported catalysts exhibit better hydrodeoxygenation (HDO) activity, with lower coke formation and higher removal of oxygen via dehydration. Furthermore, blending pyrolysis oil with poultry fat results in better pyrolysis bio-oil quality and a higher percentage of jet fuel fraction compared to carinata oil.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Anjani R. K. Gollakota, Chi-Min Shu, Prakash Kumar Sarangi, Krushna Prasad Shadangi, Sudip Rakshit, John F. Kennedy, Vijai Kumar Gupta, Minaxi Sharma
Summary: The quest for renewable and sustainable alternatives, especially biomass/bio waste, has been prompted by rising environmental concerns and the depletion of natural fossil fuels. Converting biomass residues into liquid fuels using thermochemical means seems promising, but the poor quality of bio-oil produced through pyrolysis poses challenges. Hydrodeoxygenation (HDO) offers a cutting-edge method for upgrading bio-oil into sustainable fuels that can compete with traditional fossil fuels. However, producing high-performance catalysts and understanding the physico-chemical aspects of bio-oil remain difficult. Research on upgrading pyrolysis bio-oil to gasoline is crucial for biorefineries, and this review provides detailed information on HDO mechanisms, biofuels, model compounds, and catalyst suitability for biofuels obtained from various feedstock.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Materials Science, Paper & Wood
Yan Luo, Xuan Zhou, Hui Pu, Hongling Pan, Xiao Feng, Wenhai Ding, Chenfan Ding, Yiheng Dang
Summary: The study tested raw bio-oil with three types of commercial catalysts for hydrodeoxygenation, with different levels of HDO and organic phase product yields observed. Among the catalysts, HT-36 showed the best results, with improved yields and physio-chemical properties.
Review
Green & Sustainable Science & Technology
Hossein Shahbeik, Alireza Shafizadeh, Vijai Kumar Gupta, Su Shiung Lam, Hajar Rastegari, Wanxi Peng, Junting Pan, Meisam Tabatabaei, Mortaza Aghbashlo
Summary: The unfavorable properties of biomass pyrolysis bio-oil require physical/thermochemical methods to enhance its quality. Nanotechnology offers potential solutions to overcome the drawbacks of conventional catalysts used in bio-oil upgrading. This article provides a comprehensive overview of the application of nanocatalysts in bio-oil upgrading, including their mechanisms and effects on important operating parameters. Nanocatalysts have been shown to yield higher bio-oil quality and have advantages over bulk catalysts. However, more research and development are needed before nanocatalysts can be fully realized in practical applications.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Applied
Athanasios Dimitriadis, George Meletidis, Ulrich Pfisterer, Milos Auersvald, David Kubicka, Stella Bezergianni
Summary: The study demonstrates that by blending BioMates with LCO in hydroprocessing tests, the product quality meets the expected fuel properties, while effectively reducing hydrogen consumption.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Xingfei Tang, Wentao Ding, Hao Li
Summary: This study utilizes solid-acidic zeolites and PMHS as low-load Pd-based catalyst supports to achieve efficient hydro-deoxygenation of bio-oil models under mild conditions, providing an attractive opportunity for bio-oil upgrading with improved efficiency and reduced environmental impact.
Article
Energy & Fuels
Anton Alvarez-Majmutov, Sandeep Badoga, Jinwen Chen, Jacques Monnier, Yi Zhang
Summary: The study showed that co-processing deoxygenated pyrolysis bio-oil with vacuum gas oil did not significantly impact baseline hydrocracking selectivity under fixed reaction temperatures, but led to increased hydrogen consumption with higher bio-oil content. Additionally, differences in hydrocarbon composition and fuel properties were observed in the liquid products from different bio-oil blends after co-processing.
Article
Chemistry, Inorganic & Nuclear
Gereon Behrendt, Nils Prinz, Anna Wolf, Lorena Baumgarten, Abhijeet Gaur, Jan-Dierk Grunwaldt, Mirijam Zobel, Malte Behrens, Sebastian Mangelsen
Summary: The phase width of copper hydroxycarbonate malachite upon substitution with magnesium was studied, and crystalline hydroxycarbonate samples with up to 37% magnesium were obtained. The study revealed that samples with up to 18% magnesium were phase-pure magnesian malachites, but the magnesium content can be increased beyond this threshold when mcguinnessite is accepted as a side phase. The samples were found to be promising candidates for the preparation of Cu/MgO catalysts.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Bidyut Bikash Sarma, Jelena Jelic, Dominik Neukum, Dmitry E. Doronkin, Xiaohui Huang, Felix Studt, Jan-Dierk Grunwaldt
Summary: The structural changes of CeO2-supported single-atom catalysts (SACs) under reducing and oxidizing reaction atmospheres were studied. It was found that the changes in CO vibrational frequencies can indicate the oxidation state of the metals. Pt2+ and Pd2+ are more prone to cluster formation, while Rh3+ and Ru4+ remain as single sites.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Harald Silau, Antonios Melas, Kim Dam-Johansen, Hao Wu, Anders Egede Daugaard, Martin Hoj
Summary: In the study, liquid oligomeric lignin structures were successfully synthesized through the combination of sequential solvent fractionation and catalytic hydrogenolysis. These lignin structures have potential as a bio-based aromatic substitute to fossil-based bisphenol A. The chemical properties of the lignin structures were controlled by the choice of lignin soluble fraction.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Jie Huang, Xiaozhi Li, Rui-Hong Xie, Xinglong Tan, Jiangbo Xi, Fan Tian, Pei Liu, Thomas Willum Hansen, Zheng-Wu Bai
Summary: This study reports a facile and practical method to anchor atomically dispersed Pd on an N-doped holey carbon nanotube (Pd/NHCNT) by efficiently strengthening metal-support interaction. The Pd/NHCNT catalyst shows remarkable activity for nitroarenes hydrogenation with a turnover frequency as high as 1091.49 min-1, surpassing noble metal-based catalysts. The defect-induced anchoring approach provides a new avenue for designing other highly active atomic metal catalysts with high metal dispersion.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Dan Zhao, Mingbin Gao, Xinxin Tian, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Mao Ye, Guiyuan Jiang, Haijun Jiao, Evgenii V. Kondratenko
Summary: This study investigated the effects of diffusion on the performance of ZnOx catalysts in propane and isobutane dehydrogenation reactions. Molecular dynamics simulations showed that mass transport limitations do not play a significant role in the PDH reaction, but do affect the iBDH reaction. X-ray absorption spectroscopy revealed that the nature of active ZnOx sites depends on the support material.
Review
Chemistry, Physical
Hamed Baniamerian, Martin Hoj, Matthias Josef Beier, Anker Degn Jensen
Summary: This review discusses the attractive approaches of catalytic conversion of (ligno)cellulosic biomass for the production of valuable oxygenated chemicals and platform molecules under hydrothermal or pyrolysis conditions. To design the most effective catalysts and gain a better understanding of the processes, the main reactions and possible products obtained from cellulose catalytic valorization, specifically diols, are discussed. The review systematically summarizes recent advancements of heterogeneous catalysts and their structure-activity relationships for the selective production of diols from cellulose and cellulose-derived sugars under both pyrolysis and hydrothermal conditions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Microscopy
Matthew Helmi Leth Larsen, William Bang Lomholdt, Cuauhtemoc Nunez Valencia, Thomas W. Hansen, Jakob Schiotz
Summary: Motivated by the need for low electron dose transmission electron microscopy imaging, we report the optimal frame dose range for object detection and segmentation tasks with neural networks. The MSD-net architecture shows promising abilities over the industry standard U-net architecture in generalising to frame doses below the range included in the training set, for both simulated and experimental images. It also presents a heightened ability to learn from lower dose images.
Article
Chemistry, Physical
Linda Klag, Abhijeet Gaur, Matthias Stehle, Sebastian Weber, Thomas L. Sheppard, Jan-Dierk Grunwaldt
Summary: This study systematically investigated the activity and selectivity of Bi-Mo-Co-Fe oxide catalysts in selective oxidation of isobutene. The results showed that the activity and selectivity of the catalysts depend on the variety and interaction of metal oxide phases, and the reducibility of Fe3+ is crucial for catalytic activity.
Article
Chemistry, Multidisciplinary
Lili Zhang, Ziwei Xu, Tian-liang Feng, Maoshuai He, Thomas Willum Hansen, Jakob Birkedal Wagner, Chang Liu, Hui-Ming Cheng
Summary: This study uses environmental transmission electron microscopy to observe for the first time the breaking of symmetry during the growth of a single-wall carbon nanotube. It reveals the role of topological defects and the importance of the tube-catalyst interface.
Article
Nanoscience & Nanotechnology
Chiara Mazzariol, Francesca Tajoli, Alexander E. Sedykh, Paolo Dolcet, Jan-Dierk Grunwaldt, Klaus Muller-Buschbaum, Silvia Gross
Summary: Controlling the properties of inorganic materials, such as size, shape, and functional properties, is a main focus in material development. Confined reactions within nanoreactors have shown to have advantages over traditional methods in terms of control and uniformity. A study on calcium molybdate nanophosphors found that confinement in a miniemulsion approach resulted in more uniform size, shape, and doping effectiveness, leading to improved photoluminescence properties.
ACS APPLIED NANO MATERIALS
(2023)
Review
Engineering, Environmental
William Gundtorp, Thomas Klint Torp, Anker Degn Jensen
Summary: Due to convenience and toxicity, research on the catalytic oxidation of poly-chlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) is mainly conducted on model compounds instead of PCDD/Fs themselves. This raises questions about the validity of using model compounds to design catalysts for PCDD/F removal. A review of the literature on catalytic destruction of PCDD/Fs and model compounds indicates that their reaction kinetics are similar, but with some deviations in gas phase composition. It is found that V2O5/TiO2-based catalysts are the most studied and achieve higher catalytic activity compared to other non-precious metal catalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Hamed Baniamerian, Martin Hoj, Matthias Josef Beier, Anker Degn Jensen
Summary: Hydrous pyrolysis of glucose is a promising method to produce glycolaldehyde and other valuable oxygenates. A pulsed chromatographic method was proposed to investigate the effect of operating parameters on the product distribution and glycolaldehyde yield. This technique provided insights into the reaction pathways and allowed for determination of the reaction time-frame and rate parameters.
REACTION CHEMISTRY & ENGINEERING
(2023)
Correction
Chemistry, Physical
Bidyut Bikash Sarma, Jelena Jelic, Dominik Neukum, Dmitry E. Doronkin, Xiaohui Huang, Sarah Bernart, Felix Studt, Jan-Dierk Grunwaldt
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Vasyl Marchuk, Xiaohui Huang, Jan-Dierk Grunwaldt, Dmitry E. Doronkin
Summary: The influence of Pt particle size and structure on the catalytic performance in selective ammonia oxidation for emission control applications is poorly understood. In this study, operando XAS was used to complement traditional laboratory tests to determine the factors governing activity and selectivity in Pt catalysts with different particle sizes. It was found that the increase in activity with particle size was mainly due to the presence of favorable Pt ensembles on the surface. Spectroscopic data revealed different reaction mechanisms for particles above and below a size threshold of about 2 nm. The evolution of these mechanisms correlated with catalyst activity and selectivity change.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Meng Yang, Jiafeng Yu, Anna Zimina, Bidyut Bikash Sarma, Jan-Dierk Grunwaldt, Habib Zada, Linkai Wang, Jian Sun
Summary: Converting CO2 into methanol is of great significance in the sustainable methanol economy. In this study, single-site Zr species in an amorphous SiO2 matrix were created by enhancing the Zr-Si interaction in Cu/ZrO2-SiO2 catalysts. It was found that CO2 preferentially adsorbs on the interface of Cu and single-site Zr, rather than on ZrO2 nanoparticles. Methanol synthesis was verified to occur on single-dispersed Zr sites, while the ordinary formate pathway occurred on ZrO2 nanoparticles. This work opens up new possibilities for understanding the role of atomically dispersed oxides in catalysis science.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(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)