Article
Chemistry, Analytical
Xiaohua Li, Shengnan Ge, Shanshan Shao, Zhichao Lv, Xianliang Xiang, Yixi Cai
Summary: The study utilized an external recrystallization method to fabricate a core-shell catalyst HZSM-5@MCM-41 and analyzed the effect of zeolite acidity and mesoporosity on the yield of hydrocarbons by adjusting the mass ratio of template and HZSM-5. The results showed that a proper THR was beneficial for preparing a core-shell catalyst with excellent crystallinity, acidity, and mesoporosity, leading to an enhanced yield of hydrocarbons at an appropriate pyrolysis temperature.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Physical
Fei Gao, Cailin Ji, Shougui Wang, Jipeng Dong, Changqing Guo, Yuwen Gao, Guanghui Chen
Summary: Integrating multifunctional active sites into appropriate porous materials is a promising strategy for achieving excellent catalytic performance in CO2 cycloaddition. In this work, carboxy-functionalized imidazolium ionic liquids were successfully anchored onto MCM-41 mesoporous silicates. The resulting MCM-41-Imi/COOH catalyst integrates various active sites and possesses high surface area and mesopore structure. The catalyst exhibits good catalytic activity, cycling stability, and versatility for CO2 cycloaddition reactions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mohammad Ghadermazi, Somayeh Molaei
Summary: Samarium (III) complex immobilized in MCM-41 was synthesized and characterized. The catalysts showed the attachment of 3,4,5-tri hydroxyphenyl acetic acid ligand and Sm ions to the MCM-41 host. These catalysts exhibited good performance in the synthesis of 5-substituted 1H-tetrazoles through [3 + 2] cycloaddition with NaN3. The catalyst also showed excellent recyclability without significant loss of activity for up to six cycles.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Dan Chen, Huayao Shen, Yue Zhang, Xuejun Zou, Aili Guan, Yulin Wang
Summary: This study explored the impact of cerium on the catalytic oxidation performance of formaldehyde over Ag/MCM-41 catalysts, with cerium-modified MCM-41 mesoporous materials synthesized at different ratios. The results showed that Ag/Ce-MCM-41 catalyst with Si:Ce = 1:1 ratio achieved complete formaldehyde oxidation above 130 degrees Celsius. The enhanced interaction between Ag and Ce, as well as Ce and SiO2, due to the addition of cerium to MCM-41, contributed to improved catalytic activity.
Article
Energy & Fuels
Artita Na Rungsi, Thuong Hai Truong, Chachchaya Thunyaratchatanon, Apanee Luengnaruemitchai, Nuwong Chollacoop, Shih-Yuan Chen, Takehisa Mochizuki, Hideyuki Takagi, Yuji Yoshimura
Summary: The study investigated the partial hydrogenation of soybean oil-derived fatty acid methyl esters using MCM-41 mesoporous silica-supported Pd-Pt bimetallic catalysts, resulting in the production of H-FAME enriched in mono-FAME as a potential source for high blends of biodiesel fuel. Various MCM-41 supports with different structural properties and morphologies were synthesized using different amounts of ammonia solution, leading to a series of Pd-Pt/MCM-41 bimetallic catalysts with tunable porosity.
Article
Chemistry, Multidisciplinary
Tanmoy Mandal, Tapas Kumar Dutta, Sunit Mohanty, Joyanta Choudhury
Summary: The study successfully developed a highly efficient, heterogeneous, and recyclable Pd-NHC catalyst, which shows promise in the field of heterogeneous C-H functionalization where efficient catalysts are still rare.
CHEMICAL COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Behrooz Maleki, Reza Sandaroos, Sahar Peiman
Summary: Six catalysts MnL1-MnL6, containing two crown ether rings and their analogs supported on the MCM-41 heterogeneous substrate (MnL1@MCM41-MnL5@MCM41), were synthesized and characterized. The mixture of molecular oxygen as an oxidant and these catalysts were used for the epoxidation of styrene. The supported catalysts showed better performance compared to the unsupported analogs, and they did not require an axial base and reducing agent.
Article
Materials Science, Ceramics
W. S. Abo El-Yazeed, O. R. Hayes, Awad I. Ahmed
Summary: Phosphotungestic acid supported on mesoporous MCM-41 coated NiFe2O4 magnetic nanoparticles were prepared as efficient and recyclable heterogeneous catalysts for synthesizing coumarin and xanthene derivatives. The catalysts show advantages in easy recovery, simple preparation, high stability, good catalytic performance, short reaction time, and environmentally friendly reaction conditions.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
A. Prekob, L. Vanyorek, Z. Fejes
Summary: The study found that the BCNT support exhibited higher selectivity towards benzhydrol during the hydrogenation of benzophenone, possibly due to the presence of covalently bonded nitrogen atoms that can inhibit over-hydrogenation processes.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Physical
Ziting Liu, Zhaolu Feng, Xuefeng Bai
Summary: In this paper, Ni/MCM-41 catalyst was prepared by chemical reduction method, and Nin@Pd1/M41 core-shell nanocatalysts were prepared by ultrasound-assisted galvanic replacement method. The results showed that Nin@Pd1/M41 had electron transfer and SMSI effect, promoting its catalytic performance. The dehydrogenation efficiency of H12-NEC reached 100% at 180°C for 4 h and at 170°C for 6 h, and 97.58% for 6 h at 160°C, with a TOF of 5080.6 h-1, which was better than that reported in the literature. The excellent catalytic performance of Ni6@Pd1/M41 can mainly be attributed to the synergistic effect of coordination and strain effects between the bimetals.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Nanoscience & Nanotechnology
Adam Prekob, Gabor Muranszky, Milan Szori, Gabor Karacs, Ferenc Kristaly, Tibor Ferenczi, Bela Fiser, Bela Viskolcz, Laszlo Vanyorek
Summary: Carbon black-supported palladium-platinum catalysts were prepared with and without nickel(II) oxide or iron(III) oxide promoter materials using ultrasonic cavitation technology. The one-step catalyst preparation method without the need for post-treatments showed excellent catalytic activity in the hydrogenation of nitrobenzene, with no significant differences in selectivity and aniline yield observed even when promoters were present.
Article
Biotechnology & Applied Microbiology
Jeyashelly Andas, Siti Hajar Ekhbal, Tammar Hussein Ali
Summary: This study successfully prepared MCM-41 and modified MCM-41 from silica extracted from rice husk ash, and characterized the materials through various analytical techniques. Ni-MCM-41 showed higher catalytic activity with benzaldehyde as the sole product, while MCM-41 produced benzaldehyde and styrene oxide.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Multidisciplinary
Franklin J. Mendez, Roylena Vargas, Joel Blanco, Yahse Rojas-Challa, Ernesto Bastardo-Gonzalez, Jorge A. Garcia-Macedo, Esneyder Puello-Polo, Joaquin L. Brito
Summary: The study investigated the reactivity of Ti-modified MCM-41-supported NiMo and CoMo catalysts, showing that the incorporation of Ti can enhance the activity and selectivity of the catalysts, potentially beneficial for destabilizing sulfur-containing molecules.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Applied
J. C. Bedoya, R. Valdez, L. Cota, M. A. Alvarez-Amparan, A. Olivas
Summary: In this study, mesoporous Al-MCM-41 nanospheres with variable sizes were successfully synthesized and characterized, showing hexagonal and mesoporous structure with the successful incorporation of Al ions. The smaller nanospheres exhibited more medium acidic sites on the surface. All samples displayed good selectivity towards DME, with the smallest nanospheres achieving 78% DME yield at 300 degrees C. The stability test revealed high DME yield (>60%) maintained during a 48-hour time-on-stream, indicating the potential for material recycling.
Article
Chemistry, Physical
Nga T. T. Tran, Yoshimitsu Uemura, Anita Ramli, Thanh H. Trinh
Summary: This study evaluated Al-MCM-41 supported Pd, Co, and Fe catalysts for the fast pyrolysis of lignocellulosic biomass and the upgrading of bio-oil. The results showed that bimetallic Pd-Co and Pd-Fe catalysts exhibited higher yield and stability in the hydrodeoxygenation process. The addition of Pd improved the stability of Co and Fe catalysts and reduced coke formation. The lignin-derived bio-oil mainly contained phenolic compounds, and catalytic upgrading successfully removed oxygen and reduced the amount of tar and heavy components. The Pd-Fe catalyst was identified as a suitable catalyst for upgrading of lignin-derived bio-oil.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Kelly Machado, Suman Mukhopadhyay, Gopal S. Mishra
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
(2015)
Article
Chemistry, Multidisciplinary
Kelly Machado, Suman Mukhopadhyay, Romeu A. Videira, Jaya Mishra, Shaikh M. Mobin, Gopal S. Mishra
Article
Chemistry, Applied
Bidyut Kumar Kundu, Vaishali Chhabra, Novina Malviya, Rakesh Ganguly, Gopal S. Mishra, Suman Mukhopadhyay
MICROPOROUS AND MESOPOROUS MATERIALS
(2018)
Article
Chemistry, Physical
Gopal S. Mishra, Elisabete C. B. A. Alegria, Armando J. L. Pombeiro, Luisa M. D. R. S. Martins
Article
Chemistry, Physical
Gopal S. Mishra, Anil Kumar, Suman Mukhopadhyay, Pedro B. Tavares
APPLIED CATALYSIS A-GENERAL
(2010)
Article
Chemistry, Physical
Gopal S. Mishra, Anil Kumar
APPLIED CATALYSIS A-GENERAL
(2012)
Article
Chemistry, Inorganic & Nuclear
Kelly Machado, Jaya Mishra, Shinzo Suzuki, Gopal S. Mishra
DALTON TRANSACTIONS
(2014)
Article
Chemistry, Multidisciplinary
Gopal S. Mishra, Kelly Machado, Anil Kumar
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2014)
Article
Chemistry, Physical
Gopal S. Mishra, Anil Kumar, Pedro B. Tavares
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
(2012)
Article
Chemistry, Physical
Kelly Machado, Pedro B. Tavares, Gopal S. Mishra
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
(2014)
Article
Chemistry, Inorganic & Nuclear
Telma F. S. Silva, M. Fatima Guedes da Silva, Gopal S. Mishra, Luisa M. D. R. S. Martins, Armando J. L. Pombeiro
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2011)
Article
Chemistry, Inorganic & Nuclear
Kelly Machado, Pedro B. Tavares, Cristina Freire, Gopal S. Mishra
Article
Chemistry, Physical
Gopal S. Mishra, Anil Kumar
REACTION KINETICS MECHANISMS AND CATALYSIS
(2011)
Meeting Abstract
Chemistry, Multidisciplinary
Gopal S. Mishra, Anil Kumar, Pedro B. Tavares
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2012)
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)