Article
Chemistry, Physical
Angeles Lopez-Martin, Alfonso Caballero, Gerardo Colon
Summary: The reduction temperature has a crucial effect on the catalytic performance of Mo/HZSM-5 catalyst for methane dehydroaromatiztion reaction. The optimum performance is achieved at 550 degrees C, which may be attributed to the higher fraction of reduced Mo species.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Guanna Li
Summary: This study investigated the catalytic behavior of Mo/ZSM-5 catalyst for methane dehydroaromatization to benzene reaction. The preferred location for ethylene formation was found to be the α-site, which is the main intermediate for aromatics production via the propagation pathway. On the other hand, the δ-site was favorable for the hydrocarbon pool aggregation reaction pathway.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yujie Liu, Aleksei Bolshakov, Marita Coza, Victor Drozhzhin, Emiel J. M. Hensen, Nikolay Kosinov
Summary: Dehydroaromatization of methane (MDA) under non-oxidative conditions is a promising reaction for direct valorization of natural gas and biogas. Fe-modified ZSM-5 catalysts prepared by direct hydrothermal synthesis, containing isomorphously substituted Fe-sites, exhibit superior MDA activity compared to impregnated Fe/ZSM-5 catalysts. The higher activity of [Fe,Al]ZSM-5 can be attributed to the transformation of tetrahedral Fe3+ into octahedral Fe2+ active sites during the MDA reaction.
Article
Chemistry, Physical
A. Lopez-Martin, M. F. Sini, M. G. Cutrufello, A. Caballero, G. Colon
Summary: This study analyzed the promoting effect of rhenium addition as a co-dopant in the Mo/ZSM-5 catalyst system. It was found that the sequential impregnation method affected the synergy between Mo and Re, and the catalyst with Re incorporated first showed higher aromatic yields and stability against deactivation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Energy & Fuels
Mengmeng Huang, Jianpeng Li, Qiang Liu, Meng Zhang, Zhongyi Liu, Beibei Gao
Summary: Hollow HZSM-5 zeolite catalysts with different cavity sizes and tunable shell thickness were prepared and exhibited higher conversion and selectivity in methane dehydroaromatization reaction compared to conventional solid catalyst.
Article
Chemistry, Multidisciplinary
Yujie Liu, Hao Zhang, Alexandra S. G. Wijpkema, Ferdy J. A. G. Coumans, Lingqian Meng, Evgeny A. Uslamin, Alessandro Longo, Emiel J. M. Hensen, Nikolay Kosinov
Summary: This study focused on the mechanism and structural changes of Mo/ZSM-5 catalysts during methane dehydroaromatization reaction using operando X-ray absorption near edge structure spectroscopy. The results showed that the nature of active sites is similar and the ZSM-5 unit cell contracts at the beginning of the reaction, coinciding with benzene formation.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yujie Liu, Hao Zhang, Alexandra S. G. Wijpkema, Ferdy J. A. G. Coumans, Lingqian Meng, Evgeny A. Uslamin, Alessandro Longo, Emiel J. M. Hensen, Nikolay Kosinov
Summary: This study focused on the methane dehydroaromatization reaction using Mo/ZSM-5 catalysts, revealing the reduction process of Mo-species and the nature of active sites. Additionally, the study found a correlation between the contraction of the unit cell in the catalysts and the formation of hydrocarbon pool intermediates.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Genwei Chen, Lingzhe Fang, Tao Li, Yizhi Xiang
Summary: In this study, ultralow-loading (0.001-0.05 wt %) Pt-and Zn-functionalized HZSM-5 catalysts were prepared and found to exhibit high activity and stability for light alkane dehydroaromatization. The bimetallic Pt-x-Zn-y/HZSM-5 catalysts showed significantly lower deactivation rate constants compared to the monometallic Pt/HZSM-5 catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Chemical
Yuyan Gan, Qian Lv, Yanru Li, Hua Yang, Kaiyang Xu, Lizhi Wu, Yu Tang, Li Tan
Summary: This study investigates the relationship between acid site control and the methane dehydroaromatization (MDA) reaction performance, and tunes the acid sites of the ZSM-5 zeolite by introducing promoters. The results show that appropriate strong Brønsted acid sites are favorable for aromatic formation, while excessive acid sites lead to coke deposition. The stability and aromatic selectivity of the MDA catalyst are further improved by passivating partial Brønsted acid sites using a Silicalite-1 coating.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Ruiyao Gao, Xin Li, Zhiheng Wang, Yanyan Liu, Jiong Sun, Yanmei Zhu, Songdong Yao
Summary: The study investigated the impact of oxygen-containing gas components on the reaction regeneration cycle of methane dehydroaromatization (MDA). The results indicated that the addition of oxygen components can prolong the reaction time but cannot prevent the deactivation of the regenerated catalyst. After regeneration, the species and texture properties of the catalyst were restored, leading to complete recovery of methane conversion and aromatic formation. However, the increase in the size of Mo species during regeneration disrupted carbon deposition and significantly reduced methane dissociation. The crystallinity and number of strong acid sites of the catalyst decreased to a stable level before the collapse of the zeolite framework, without hindering aromatic formation. The recovered large-sized Mo species may accelerate the irreversible collapse of the zeolite framework, thereby destroying the Mo/HZSM-5 catalyst.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Applied
Shaojie Li, Xianxuan Ren, Brahim Mezari, Yujie Liu, Peerapol Pornsetmetakul, Anna Liutkova, Nikolay Kosinov, Emiel J. M. Hensen
Summary: Nanosized ZSM-5 zeolites with high acidity (Si/Al < 15) are advantageous catalysts for obtaining aromatics in C1 chemistry. However, synthesizing these nanosized zeolites in a cost-effective and scalable manner is challenging. In this study, nanosized ZSM-5 (20-50 nm) with high acidity (Si/Al = 11) was successfully synthesized using p-phenylenedimethylene-bis(tripropylammonium) dichloride as the sole organic structure-directing agent (OSDA). The nanosized ZSM-5 demonstrated enhanced aromatics formation compared to bulk ZSM-5 due to its high acidity and shortened diffusion paths in methanol dehydration and non-oxidative dehydroaromatization of methane reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Pingping Chen, Xiaohui Wang, Rui Yu, Yu Gu, Yuchao Lyu, Yupeng Tian, Jianye Fu, Xinmei Liu
Summary: The dispersion of Mo is crucial for the performance of Mo/ZSM-5 catalyst in methane dehydroaromatization reaction. The introduction of citric acid during the catalyst preparation improves the Mo dispersion and enhances its activity and selectivity. The chelation between citric acid and Mo species leads to the isolation of active components during calcination, resulting in improved Mo dispersion.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Yu Gu, Pingping Chen, Hao Yan, Xiaohui Wang, Yuchao Lyu, Yupeng Tian, Wanrong Liu, Zifeng Yan, Xinmei Liu
Summary: The study shows that Brønsted acid sites play a key role in coke formation during methane dehydroaromatization. Modified catalysts exhibit lower naphthalene selectivity and higher C2 selectivity. It is proposed that aromatization is an intrinsic property of Mo, and Mo-associated carbonaceous species act as precursors for both coke and aromatics production.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Engineering, Chemical
Themba E. Tshabalala, Neil J. Coville, James A. Anderson, Michael S. Scurrell
Summary: The study investigated the catalytic performance of platinum modified Mo/H-ZSM-5 catalysts in the MDA reaction, showing that platinum helped to increase aromatic selectivity and reduce coke selectivity. Ruthenium promoted catalyst outperformed platinum and palladium promoted Mo/H-ZSM-5 catalysts in catalytic performance, achieving higher methane conversion and benzene selectivity.
APPLIED PETROCHEMICAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Taleb Zarei, Yegane Davoodbeygi, Saman Islamimanesh, Zahra Zarei
Summary: The methane aromatization reaction to produce benzene using tungsten and molybdenum catalysts supported on ZSM-5 zeolite was investigated. It was found that molybdenum catalysts showed higher activity and stability compared to tungsten catalysts, and an increase in molybdenum loading enhanced the catalytic activity and methane conversion.
IRANIAN JOURNAL OF CHEMISTRY & CHEMICAL ENGINEERING-INTERNATIONAL ENGLISH EDITION
(2022)
Article
Chemistry, Physical
Ofentse A. Makgae, Arthur N. Moya, Tumelo N. Phaahlamohlaka, Chen Huang, Neil J. Coville, Angus Kirkland, Emanuela Liberti
Summary: In this study, the surface terminations of Co3O4 nanoparticles supported on hollow carbon spheres were directly observed using exit wavefunction reconstruction from aberration-corrected transmission electron microscopy. The surface {100}, {110}, and {111} facets of spinel Co3O4 were found to exhibit characteristic active sites for CO adsorption, with the {100} and {110} terminations being more suitable than {111}. However, the presence of oxygen on the {111} surface termination also indicates its essential role in CO adsorption.
Article
Chemistry, Physical
Ofentse A. Makgae, Tumelo N. Phaahlamohlaka, Benzhen Yao, Manfred E. Schuster, Thomas J. A. Slater, Peter P. Edwards, Neil J. Coville, Emanuela Liberti, Angus Kirkland
Summary: In this study, the effect of CO reduction to CO on the reducibility of Co3O4 nanoparticles supported on hollow carbon spheres was investigated using high-resolution aberration-corrected analytical electron microscopy. It was found that carbon encapsulation of twinned fcc Co particles occurred during the syngas treatment, while H2-treated particles mainly consisted of CoO. Additionally, the reducibility of Co3O4 nanoparticles was improved in syngas compared to H2 at 350°C. The study also explored the impact of high temperature on the reducibility of Co3O4 nanoparticles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Chemistry, Multidisciplinary
Joyce B. Matsoso, Catherine Journet, Neil J. Coville, Zdenek Sofer
Summary: Graphene, an important 2D material, has been widely used in various applications due to its remarkable properties. Through intentional doping with boron and nitrogen, graphene derivatives with new and improved properties can be produced. However, the application of B/N co-doped graphene nanomaterials in renewable energy conversion and storage technology lacks research data.
Article
Energy & Fuels
Carl P. Wolmarans, Cuthbert Nyamupangedengu, Carina Schumann, Neil J. Coville, Marcelo M. F. Saba
Summary: This study investigates the effect of additives on the propagation velocity of positive polarity streamers in cyclohexane. It is found that diethylaniline (DEA) is an effective additive in slowing down streamers, while toluene does not significantly affect their propagation velocity.
Article
Chemistry, Analytical
Ludwe L. Sikeyi, Themba D. Ntuli, Thomas H. Mongwe, Nobanathi W. Maxakato, Neil J. Coville, Manoko S. Maubane-Nkadimeng
Summary: Well-dispersed ultrafine platinum nanoparticles (Pt NPs) loaded on carbon nano-onions (CNOs) surface were successfully synthesized and their catalytic performance was evaluated. Boron oxide modified carbon nano-onions (B-CNOs) as the support for Pt NPs showed enhanced catalytic activity and stability, which could be attributed to the increased electronic conductivity by boron oxide and the enhanced interaction with water.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Lerato L. Mokoloko, Roy P. Forbes, Neil J. Coville
Summary: Carbon dots (CDs) are a new type of carbon allotrope with a 0-D structure and nanoparticle sizes < 10 nm. This review discusses the synthesis strategies of converting 0-D carbons to higher-dimensional carbons, as well as the formation mechanisms and applications of larger carbon structures. The role of surface functional groups on CDs and the formation of supra-CDs are also explored.
Editorial Material
Chemistry, Multidisciplinary
James Darkwa, Neil J. Coville, Marian A. Nkansah, Adebola O. Oyedeji, Mama El Rhazi
FRONTIERS IN CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Ludwe L. Sikeyi, Laercia R. Bila, Themba D. Ntuli, Cyril T. Selepe, Nobanathi W. Maxakato, Neil J. Coville, Manoko S. Maubane-Nkadimeng
Summary: This study presents the synthesis of Pt supported on titania oxide nanoparticles decorated on sulfur doped onion-like carbon nanoparticles (S-OLCNs) and their application as electrocatalysts for ammonia oxidation reactions. The incorporation of TiO2 nanoparticles into Pt/S-OLCN was found to significantly enhance the activity of Pt for the ammonia oxidation reaction by facilitating the electron transfer process. Pt/TiO2/S-OLCN also exhibited better long term stability and faster charge transfer resistance compared to other catalysts tested.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Electrochemistry
B. Shaku, T. P. Mofokeng, N. J. Coville, K. I. Ozoemena, M. S. Maubane-Nkadimeng
Summary: This study presents the conversion of marula nutshell waste into nitrogen-doped activated carbon (N-ACs) for supercapacitor electrode material. The N-ACs demonstrated high surface area and porosity, resulting in excellent electrochemical performance in KOH and KNO3 electrolytes. The material achieved remarkable energy and power densities in 2.5 M KNO3 electrolyte, making it a promising energy storage material for supercapacitors.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Ryan O'Connor, Joyce B. Matsoso, Victor Mashindi, Pumza Mente, Lebohang Macheli, Beatriz D. Moreno, Bryan P. Doyle, Neil J. Coville, Dean H. Barrett
Summary: In this study, the influence of counter anion on the structural properties of hollow carbon spheres (HCS) support was investigated. It was found that the thickness of the HCS shell depended on the type of nickel precursor salt used. The choice of precursor salt also affected the textural properties of the HCS nanosupports and influenced the growth of nickel nanoparticles.
Article
Materials Science, Multidisciplinary
Ibrahim B. Usman, Clara I. Garcia-Martinez, Joyce B. Matsoso, Isidro Cruz-Cruz, Rudolph Erasmus, Neil J. Coville, Jose P. M. Serbena, Daniel M. Wamwangi
Summary: This study investigates the chemical vapour sensing behavior of pristine gallium nitride (GaN) and carbon coated GaN nanostructures towards different analytes. The findings show that carbon coating improves the sensitivity of GaN to polar protic analytes, especially toxic ammonia. Additionally, the carbon coating enhances the sensitivity to water molecules.
MATERIALS TODAY COMMUNICATIONS
(2022)
Review
Optics
Orlette Mkhari, Themba D. Ntuli, Neil J. Coville, Edward N. Nxumalo, Manoko S. Maubane-Nkadimeng
Summary: Carbon dot/support nanocomposites exhibit improved properties and hold great potential for applications in fields such as photocatalysis, electrochemistry, optics, and nanomedicine.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Djalila Guettaia, Hanane Zazoua, Mohammed Reda Ramdani, Khaldoun Bachari, Neil J. Coville, Amel Boudjemaa
Summary: This paper reports on the photodegradation of ibuprofen (IBP) using SiO2@xTiO(2) synthesized via a hydrothermal method. The catalysts were prepared by adding TiO2 to a Stober synthesized silica at different weight loadings. The SiO2@xTiO(2) showed excellent photodegradation efficiency and the degradation rate of IBP increased with the formation of H2O2.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Themba D. Ntuli, Ludwe L. Sikeyi, Faria Dziike, Neil J. Coville, Edward N. Nxumalo, Manoko S. Maubane-Nkadimeng
Summary: Waste cooking oil was converted into onion-like nanocarbons (OLNCs) through flame pyrolysis and then combined with TiO2 to form TiO2/OLNC nanocomposites using hydrothermal treatment. The mass ratio of TiO2 to OLNCs was varied, while the mass of TiO2 was kept constant. The nanocomposites exhibited enhanced photocatalytic activity and degradation efficiency for methyl orange due to the high adsorption efficiency of OLNCs and the hindrance of electron-hole recombination.
APPLIED SCIENCES-BASEL
(2023)
Review
Chemistry, Physical
Lerato L. Mokoloko, Roy P. Forbes, Neil J. Coville
Summary: Since their discovery in 2004, carbon dots (CDs) have been widely used in various applications due to their fluorescent properties. However, the potential uses of CDs as catalysts and supports in catalytic reactions are still relatively unexplored. Studies have shown the advantages of using CDs in catalysis, but there are challenges associated with their stability and aggregation due to their small size.
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)
