Article
Chemistry, Physical
Vadim Samoilov, Mariia Kniazeva, Tatyana Kuchinskaya, Lev Foss, Dmitry Borisov, Makhmut Yakubov, Anton Maximov
Summary: A method for preparing heterogeneous acid catalysts based on asphaltenes from vacuum residue was proposed. The sulfonated asphaltenes showed high activity and stability in the ketalization reaction between glycerol and acetone. The most active sample had a lower activation energy compared to other known heterogeneous catalysts and exhibited no acid leaching or loss of activity after multiple cycles.
Article
Green & Sustainable Science & Technology
Shivali Arora, Vijayalakshmi Gosu, U. K. Arun Kumar, Verraboina Subbaramaiah
Summary: The present study investigated the catalytic activity of heterogeneous catalyst for transesterification of glycerol into glycerol carbonate. The study found that lithium impregnated on MCM-41 framework showed better catalytic activity, leading to an increase in the average pore diameter. The optimal conditions for glycerol carbonate yield were determined as 5% Li impregnation, calcination at 450°C, reaction temperature of 90°C for 3 hours, achieving a 93.14% yield.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Yaping Zhang, Tongying Feng, Jingli Liu, Qingze Jiao, Bin Zhen
Summary: Glycerol ketonization is an important method to increase its value and improve the sustainability of biodiesel. This study investigated the role of NaOH in the ketonization process.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Energy & Fuels
Jimmy Nelson Appaturi, Rajabathar Jothi Ramalingam, Hamad A. Al-Lohedan, Fitri Khoerunnisa, Tau Chuan Ling, Eng-Poh Ng
Summary: The highly active and selective acetalization catalyst MCM-41-16Alanine, synthesized using post-grafting method, exhibits excellent catalytic performance in the acetalization of glycerol with furfural reaction, achieving high conversion rate and selectivity for a valuable dioxolane biofuel additive.
Article
Chemistry, Multidisciplinary
Qingying Liu, Jiang Wang, Zhenxing Liu, Ruisheng Zhao, Aiju Xu, Meilin Jia
Summary: Mesoporous B-MCM-41 catalysts with varying boron content (B/Si = 0.015-0.147) were prepared using a simple hydrothermal synthesis method. The catalyst with B/Si = 0.048 exhibited favorable activity, stability, and water tolerance in the oxidative dehydrogenation of propane reaction. The active sites for ODHP were identified as the tri-coordinated B-OH species incorporated into the mesoporous silica framework.
Article
Nanoscience & Nanotechnology
Emad Al-Dhubhani, Michele Tedesco, Wiebe M. de Vos, Michel Saakes
Summary: Electrospinning combined with electrospraying can produce efficient bipolar membranes (BPMs) with enhanced water dissociation performance by introducing MCM-41 as a catalyst, which is of great significance for fuel cell and flow battery applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Ahmad Zuhairi Abdullah, Natasha Ghazali, Peng Yong Hoo, Nor Irwin Basir
Summary: In this study, zirconia was incorporated into mesoporous MCM-41 support for the selective esterification of glycerol with fatty acid. The catalysts showed correlations between their characteristics and activity under different reaction conditions, with the precipitation method demonstrating more internal incorporation of the acidic component.
CHEMICAL ENGINEERING COMMUNICATIONS
(2022)
Article
Polymer Science
Houda Douba, Smain Sabour, Lakhdar Benatallah, Meriem Fizir, Ourida Mohammedi
Summary: In this study, titanium-containing MCM-41 was synthesized and used as a catalyst for the oxidation of secondary alcohol. Characterization techniques such as FT-IR, BET, XRD, SEM-EDX, and Raman spectroscopy were used to analyze the catalysts and the results showed successful insertion of Ti into the MCM-41 framework. The catalytic performance of Ti-MCM-41 and Ti/Al-MCM-41 was evaluated, with Ti directly inserted into mesoporous silica gel showing better performance and Ti/Al-MCM-41 prepared by impregnation exhibiting high catalytic activity and regeneration ability.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Weilu Wang, Xiangke Zeng, Yanliu Dang, Ping Ouyang, Haidong Zhang, Guangming Jiang, Fan Dong, Tao Yang, Steven L. Suib, Yang He
Summary: An inexpensive Fe doped aluminoborate material with high selectivity and recyclability has been developed for the ketalization of glycerol. The structure of iron species and surface boron sites play crucial roles in the reaction process. Changing the iron loading can tune the structure of iron species in the material, thereby affecting the selectivity of the reaction.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Applied
Arti Malik, Udai P. Singh
Summary: We report the synthesis, characterization, and catalytic activity of a highly efficient and reusable silica-based catalyst MCM-41@CP@PAL@Cu. The catalyst was prepared by anchoring a Cu(II)-Schiff base complex onto mesoporous MCM-41 with a surface-grafted -chloro group. Various analytical methods, including FT-IR, Low angle P-XRD, TGA, N-2 adsorption-desorption, SEM, TEM, and MPAES, were used to characterize the obtained catalyst. The composition and chemical state of Cu metal in the catalyst were identified using X-ray photoelectron spectroscopy. The catalyst MCM-41@CP@PAL@Cu was employed for the conversion of various alkenes to their epoxides with a yield of 99% in the model reaction. The catalyst can be reused for at least six times.
JOURNAL OF POROUS MATERIALS
(2023)
Review
Chemistry, Physical
Evandro Alves Nakajima, Ligia Gomes Oliveira, Lazaro Jose Gasparrini, Guilherme Emanuel de Queiros Souza, Antonio Augusto Ignacio, Helton Jose Alves, Carlos Eduardo Borba
Summary: This article investigates the kinetic model for dry methane reforming using Ni/Si-MCM-41 catalysts, with the single-site reversible Langmuir-Hinshelwood model showing the best fit among six models tested. The higher temperatures and lower flow rates resulted in increased methane conversion and hydrogen production, with methane conversions over 85% and H2/CO ratio near 1. The activation energy for the best model was estimated to be 76.6 kJ/mol, demonstrating its potential for mathematical modeling in reactor simulation for syngas or hydrogen-rich gas production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Dhruvi Pithadia, Anjali Patel
Summary: This article reports a sustainable synthesis method of an innovative heterogeneous catalyst (SiW11/MCM-22), which shows great potential in catalysis. The catalyst exhibited commendable catalytic performance in the acetalization reaction of glycerol and furfural, achieving high conversion and selectivity under mild reaction conditions.
Article
Materials Science, Paper & Wood
Yuehui Luo, Lijuan Zhu, Yuting He, Mingyu Yang, Yanhua Zhang, Minghui Fan, Quanxin Li
Summary: This study demonstrates the directional production of cresol from cellulose through selective catalytic pyrolysis and catalytic oxidation. The proposed reaction pathways and mechanism provide insights into the transformation of cellulose into bio-based cresol.
Article
Chemistry, Physical
Opeoluwa O. Fasanya, Abdulazeez Y. Atta, Myo T. Z. Myint, Joydeep Dutta, Baba Y. Jibril
Summary: CuZn-based catalysts synthesized by different methods showed diverse physico-chemical properties. Catalysts prepared by one pot hydrothermal synthesis and coimpregnation exhibited the highest methanol conversion and H2 selectivity, indicating that catalytic activity is largely affected by the nature of Cu species within the catalyst matrix.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Yixuan Huang, Guangcai Zhang, Qinhui Zhang
Summary: The experiment demonstrated that the dispersity and acidity of the WOX/MCM-41 solid acid catalyst were influenced by the impregnation amount and calcination temperature of WOX speciation. In the ketalization reaction of glycerol and acetone, the optimal preparation conditions for the WOX/MCM-41 solid acid catalyst were impregnation of 20 wt % and calcination at 350 degrees C.
Article
Chemistry, Physical
Zi-Ye Liu, Qian-Yu Wang, Ji-Ming Hu
Summary: In this study, a layered carbon dot composite catalyst (NiFe LDH@CDs) was prepared using a one-step coprecipitation method, without the need for heating or hydrothermal treatment. The CD-functionalized catalyst facilitated rapid charge transfer and accelerated the oxygen evolution reaction. Additionally, the heterojunction structure formed between NiFe LDH and CDs efficiently suppressed photoelectron-hole recombination.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Rohit Kumar, Ankit Kumar Srivastava, Palaniyappan Nagarasu, Vedichi Madhu, Ekambaram Balaraman
Summary: We designed and synthesized a NN-CoII bidentate complex and used it for the amination of alcohols under mild and solventless conditions. The complex exhibited good reactivity towards both primary and sterically hindered secondary alcohols, providing high yields of amines. The pyrazole moiety in the ligand played a crucial role in the reaction. Furthermore, we demonstrated the reusability of the complex as a homogeneous cobalt catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shivanand Chettri, Liang-Ting Wu, Sagarmani Rasaily, Debesh Sharma, Bikram Gurung, Rajani Dewan, Sudarsan Tamang, Jyh-Chiang Jiang, Anand Pariyar
Summary: Replicating the enzymatic surface microenvironment in vitro is challenging, but constructing an analogous model could facilitate our understanding of surface effects and aid in developing an efficient bioinspired catalytic system. In this study, five unique Cu2O morphologies were generated, and the surface morphology variations were found to be a consequence of differences in the exposure of low-index facets. The reactivity of Cu2O was found to be influenced by the proportion of {110} planes, with r-Cu2O exhibiting the highest reactivity.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Yong Tang, Jianhao Qiu, Dingliang Dai, Guanglu Xia, Lu Zhang, Jianfeng Yao
Summary: Defect engineering has been shown to improve the photocatalytic performance. This study investigated the use of defect-rich UiO-66-NH2 wrapped by ZnIn2S4 as a catalyst for photocatalytic H2O2 production. The defects in UiO-66-NH2 enhanced O-2 adsorption and charge separation, leading to higher H2O2 yield. The insights from this work can advance the research in defect engineering of MOFs and photocatalytic H2O2 synthesis.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Ruiyang Qu, Shuxin Mao, Jana Weiss, Vita A. Kondratenko, Evgenii V. Kondratenko, Stephan Bartling, Haifeng Qi, Annette-Enrica Surkus, Kathrin Junge, Matthias Beller
Summary: The hydrogenation of amides, a challenging reaction usually performed at high temperatures, has been achieved under milder conditions using a new Pt-MoOx/TiO2 catalyst. This catalyst system enables the selective hydrogenation of various amides and imides.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Xiaoran Niu, Ao Wang, Lei Tong, Lei Wang, Yuan Kong, Chenliang Su, Hai-Wei Liang
Summary: This study introduces a novel intermetallic PdCu3 catalyst supported on defective nanodiamond-graphene (ND@G), which exhibits high selectivity (95%) and remarkable activity (turnover frequency: 2940 h(-1)), six times higher than that of the commercial Lindlar catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Review
Chemistry, Physical
Zhiyuan Zheng, Yiming Yue, Hongying Zhuo, Qinggang Liu, Yanqiang Huang
Summary: This review presents the recent research advances on single-atom catalysis for deep reduction of CO2. Detailed introductions and summaries were classified into three categories based on proton-coupled multi-electron transfer approaches: strengthening metal-support interaction, rational design and regulation of coordination environment, and development of SACs with multi-atom active sites. The challenges and future research directions in the field of SACs for CO2 reduction are also proposed.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shiv Kumar, Paramita Datta, Anup Bhunia, Swadhin K. Mandal
Summary: This article reports a transition-metal-free process for in situ denitrogenation of tosylhydrazones, resulting in the production of various sulfones. The authors used a phenalenyl-based odd alternant hydrocarbon as a photoredox catalyst, which acted as a potent oxidant to facilitate the denitrogenation reaction. The method showed wide functional-group tolerance and high yields, making it suitable for late-stage modification of natural products.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
L. A. Luque-Alvarez, J. Gonzalez-Arias, F. Romero-Sarria, T. R. Reina, L. F. Bobadilla, J. A. Odriozola
Summary: Currently, the production of acetic acid through the carbonylation reaction of methanol has limitations, leading to the exploration of alternative methods using heterogeneous catalysts. This study investigates the methanol carbonylation reaction over a Cu-H-MOR catalyst and proposes a reaction mechanism based on the catalytic behavior and performance of the catalyst. The results provide insights into the reaction mechanism and the involvement of acid and redox centers.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)