Article
Chemistry, Multidisciplinary
Mingrui Li, Yixuan Liu, Xialing Lin, Jinyu Tan, Song Yang, Hu Li
Summary: The HfCl4-mediated acid-base bifunctional catalytic system efficiently converts furfural to gamma-Valerolactone with synergistic effects from Hf4+ Lewis acidity, HfO(OH)(2)center dot xH(2)O moderate basicity, and HCl Bronsted acidity. The catalytic strategy offers a new approach for selectively converting biomass feedstocks involving multiple steps and complex processes.
Article
Chemistry, Applied
Byeongju Song, Jeongmyeong Kim, Iljun Chung, Yongju Yun
Summary: The catalytic properties of Pt catalysts supported on mesoporous silica were studied in the enantio-selective hydrogenation of ethyl pyruvate. The results showed that the pore structure and size of the m-SiO2 supports significantly influenced both the activity and enantioselectivity. The use of specific modifiers and H-2 pressure further improved the performance of the catalysts.
Article
Energy & Fuels
Fujun Lan, Yu Shu, Huiling Zhang, Dexiang Zhang, Qingxin Guan, Wei Li
Summary: This study presents a confined Cu cluster catalyst by uniformly encapsulating ultrafine Cu nanoclusters in aminofunctionalized nanosized mesoporous silica spheres (NMSSs-NH2), which exhibits excellent hydrogenation performance for biomass-derived levulinic acid (LA) and demonstrates the potential of inexpensive Cu cluster-based catalysts for the production of high-value chemicals from renewable biomass.
Article
Nanoscience & Nanotechnology
Jacob W. Cleveland, Ji Il Choi, Ryoh-Suke Sekiya, Jinwon Cho, Hyun June Moon, Seung Soon Jang, Christopher W. Jones
Summary: This study explores the efficacy of silica/organic hybrid catalysts in aldol condensation and finds that lower-molecular-weight copolymers are more active than other catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Guanyi Chen, Lan Liang, Ning Li, Xukai Lu, Beibei Yan, Zhanjun Cheng
Summary: Bio-oil, as an alternative and promising green energy source, needs to be upgraded through the electrocatalytic hydrogenation (ECH) process due to its nature issues. ECH integrates the advantages of mild operating conditions, no petrochemically derived hydrogen and good controllability, but still faces challenges in determining the dominant steps and exploring efficient electrocatalysts.
Article
Chemistry, Multidisciplinary
Supphathee Chaowamalee, Ning Yan, Chawalit Ngamcharussrivichai
Summary: This study focused on the synthesis and characterization of propylsulfonic acid-functionalized nanocomposites based on natural rubber and hexagonal mesoporous silica (NRHMS-SO3H) as heterogeneous acid catalysts. The catalytic performance of these nanocomposites was evaluated in the esterification of levulinic acid with alcohols. Compared to traditional hexagonal mesoporous silica, the NRHMS-SO3H nanocomposites exhibited higher catalytic activity due to the synergistic effect between the strongly acidic-functional group and surface hydrophobicity. Tuning the hydrophobicity and acidity on a nanocomposite surface proved to be an effective strategy for energy reduction in catalysis.
Article
Engineering, Environmental
Young-Kwon Park, Jeong-Myeong Ha, Shinyoung Oh, Jechan Lee
Summary: The study reviews the transfer hydrogenation method to upgrade bio-oil, focusing on the major factors affecting the process. It concludes by identifying future challenges and the requirements to make the transfer hydrogenation upgrading process commercially available.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Analytical
Diana Catalina Palacio Lozano, Hugh E. Jones, Remy Gavard, Mary J. Thomas, Claudia X. Ramirez, Christopher A. Wootton, Jose Aristobulo Sarmiento Chaparro, Peter B. O'Connor, Simon E. F. Spencer, David Rossell, Enrique Mejia-Ospino, Matthias Witt, Mark P. Barrow
Summary: In this study, a hyphenated ultrahigh-resolution mass spectrometry combined with chemical reactivity was used for the first time to analyze the isomeric species in bio-oils. The reactivity of these species was found to be related to carboxylic acid, aldehyde, and ketone functional groups. This approach revealed the increased chemical complexity of upgraded bio-oils and allowed for targeted detection of valuable compounds within the bio-oils.
ANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Inorganic & Nuclear
Neha Benedicta Fernandes, Yogendra Nayak, Sanjay Garg, Usha Y. Nayak
Summary: The field of advanced nanotechnology offers a wide range of nanotheranostics for treating malignant tumors. Among them, Mesoporous Silica Nanoparticles (MSNs) combined with upconversion nanoparticles have gained prominence in biomedicine research due to their remarkable properties in drug targeting, bio-imaging, and photodynamic/photothermal therapy. MSNs have versatile pore sizes, high drug loading efficiency, and can be functionalized to enhance their applicability. This article focuses on MSN-based hybrid nanotheranostics and their designing strategies, characterization, applications, efficacy, limitations, biotoxicity, as well as current challenges and future perspectives.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Engineering, Environmental
Ali Ayub, Sara Ahsan, Daniel Meeroff, Masoud Jahandar Lashaki
Summary: The potential of amine-grafted silica materials for single-stage biogas purification was investigated. The materials showed high CO2 adsorption performance and stability, making them a viable method for biogas purification.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Jeongmyeong Kim, Minji Yun, Byeongju Song, Won Bae Kim, Yongju Yun
Summary: The development of chiral catalysts is crucial for producing enantiopure compounds, which are highly sought after by the pharmaceutical and fine chemical industries. Heterogeneous catalysts, such as supported and chirally modified Pt catalysts, offer advantages like high stability, easy separation, and reusability. In this study, a highly efficient and versatile Pt/B-SiO2 catalyst was developed through the facile impregnation method, demonstrating excellent enantioselective hydrogenation performance for alpha-keto esters.
Article
Energy & Fuels
Tharifkhan Shan Ahamed, Susaimanickam Anto, Thangavel Mathimani, Kathirvel Brindhadevi, Arivalagan Pugazhendhi
Summary: Bio-oil is being investigated as a potential alternative to petroleum crude due to its similar composition, but its complex composition presents challenges. Therefore, upgrading techniques are necessary to improve the quality and application of bio-oil. Research on enhancing bio-oil quality through various methods is an important direction for further study.
Article
Green & Sustainable Science & Technology
Yifeng He, Ronghou Liu, Dominic Yellezuome, Wanxi Peng, Meisam Tabatabaei
Summary: This study focuses on the upgrading of biomass-derived bio-oil through catalytic hydrogenation. A new catalyst, Rh/ZrO2, was developed with high deoxygenation ability. Catalytic hydrogenation can remove oxygen from bio-oil and reduce its oxygen content, thereby enhancing its potential as a biofuel.
Article
Chemistry, Physical
Jinyu Tan, Yixuan Liu, Mingrui Li, Hu Li, Song Yang
Summary: This study prepared a series of functionalized coordination organophosphate-Hf polymers with excellent morphology and performance, which can efficiently catalyze the conversion of furfural to gamma-valerolactone, exhibiting outstanding catalytic activity and stability.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Green & Sustainable Science & Technology
M. Srida, S. -Y. Chen, S. M. Smith, C. Ngamcharussrivichai, S. Boonyuen, H. Tateno, T. Mochizuki, A. Luengnaruemitchai
Summary: This study prepared bifunctional solid acid catalysts composed of aluminum (Al) as Lewis acid sites and sulfonic acid (SA) as Bronsted acid sites by direct synthesis. These catalysts were evaluated for the conversion of glucose to 5-hydroxymethylfurfural (HMF) and the 5Al-15SA-S15 catalyst achieved 95% conversion of glucose and a 51% yield of HMF with good stability and reusability. This study provides important insights into the properties and applications of solid acid catalysts.
MATERIALS TODAY SUSTAINABILITY
(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)