Article
Energy & Fuels
Xiaomei Lei, Xiangze Du, Hui Xin, Xiaoqin Chen, Huiru Yang, Linyuan Zhou, Yan Zeng, Hualong Zhang, Yunfei Tian, Dan Li, Changwei Hu
Summary: In this study, the relationship between the micro-structure of NiCo bimetallic catalyst and its catalytic performance was explored. The catalyst pretreated by H2 exhibited superior performance in the hydrodeoxygenation of jatropha oil compared to catalysts pretreated by NH3 and CH4/H2.
Article
Chemistry, Inorganic & Nuclear
Saurabh Sharma, Udai P. P. Singh
Summary: A new hybrid catalyst has been synthesized by immobilizing copper(II) alpha-diimine complex on mesoporous silica. The catalyst shows high reactivity and stability in converting alkenes into epoxides, with trans stilbene achieving a maximum yield of 100%. It can be recycled and reused multiple times without significant loss of activity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Muthumanickam Shenbagapushpam, Thennila Muthukumar, Sathiya Mahakrishnan, Selvakumar Kodirajan
Summary: An efficient, mild, and reusable catalytic hydroacylation and hydroamination reactions were developed using heterogeneous Ti(IV) anchored MCM-41 catalyst from various aryl, heteroaryl, aliphatic aldehydes as well as aryl and aliphatic amines with dialkyl azodicarboxylate. The catalyst showed excellent yields, a wide substrate scope, and para-selectivity with unprotected amines.
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
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
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
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
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
Energy & Fuels
Maryam Sadehvand, Ahmad Amiri, Ali Pazoki, Farzaneh Fadaei Tirani
Summary: The electrochemical reduction of carbon dioxide to carbon monoxide was investigated using two different catalysts. These catalysts were synthesized and characterized using various spectroscopic techniques. The results showed that both catalysts exhibited high catalytic activity for the reduction of carbon dioxide to carbon monoxide under suitable reaction conditions.
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
Chemistry, Inorganic & Nuclear
M. Bharathi, S. Mathivathani, S. Indira, G. Vinoth, Denzil Britto Christopher Leslee, K. Shanmuga Bharathi
Summary: A new class of heterogeneous catalyst, Ni-MCM-41, has been synthesized and characterized. It shows excellent performance in the green synthesis of quinoxaline derivatives through thermal, ultrasonic, and microwave methods, providing advantages such as mild reaction conditions, short reaction time, high yield, catalyst stability, and easy retrievability.
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
Kuan Wang, Zhe Cao, Junlei Wang, Zhen-Hong He, Dan Wang, Rong-Rong Zhang, Weitao Wang, Yang Yang, Zhao-Tie Liu
Summary: This study presents an effective non-precious metal catalyst for the hydrogenation of quinolines under mild and solvent-free conditions. The catalyst shows high conversion and selectivity, as well as good reusability and scalability. The presence of Fe-Ni and Ni-Cu alloys in the catalyst contributes to the efficient and selective hydrogenation of quinolines at low temperatures.
MOLECULAR CATALYSIS
(2022)
Article
Engineering, Environmental
Yige Guo, Ying Zhao, Tianxue Yang, Bin Gong, Bin Chen
Summary: A new hybridization strategy of Fe/Cu bimetal and silica-based mesoporous molecular sieve MCM-41 has been proposed to improve the performance of Fe-0 in removing Cr (VI) from water. The results showed that the two-dimensional mesoporous structure of MCM-41 can provide skeleton support for Fe-0 and overcome aggregation bottleneck, leading to a high Cr(VI) removal rate of 98.98% after 40 minutes.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
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)