Results 31 to 40 of about 1,785,034 (337)

Single-Atom Catalysts: Synthetic Strategies and Electrochemical Applications

Joule, 2018
The performance and the cost of electrocatalysts play the two most vital roles in the development and application of energy conversion technologies. Single-atom catalysts (SACs) are recently emerging as a new frontier in catalysis science.
Yuanjun Chen, Shufang Ji, Chen Chen, Q. Peng, Dingsheng Wang, Yadong Li   +5 more
semanticscholar   +1 more source

Guanidinylated SBA-15/Fe3O4 mesoporous nanocomposite as an efficient catalyst for the synthesis of pyranopyrazole derivatives

Scientific Reports, 2021
In this study, a novel mesoporous nanocomposite was fabricated in several steps. In this regard, SBA-15 was prepared by the hydrothermal method, next it was magnetized by in-situ preparation of Fe3O4 MNPs.
Fereshte Hassanzadeh-Afruzi, Somayeh Asgharnasl, Sara Mehraeen, Zeinab Amiri-Khamakani, Ali Maleki   +4 more
doaj   +1 more source

Factors affecting the extent of branching in fischertropsch synthesis products with iron-based catalysts [PDF]

, 1989
Branched products are mainly formed during secondary isomerization reactions, and not in the main synthesis reaction itself. The extent of branching is a function of the catalyst formulation. High acidity and a low hydrogenation strength of the catalyst (
Snel, R.
core   +2 more sources

The effect of Nb2O5 and ZrO2 additions on the behaviour of Li/MgO and Li/Na/MgO catalysts for the oxidative coupling of methane [PDF]

, 1991
Incorporation of Nb2O5 or ZrO2 into both Li/MgO and Li/Na/MgO systems produced ternary and quaternary catalysts, respectively, capable of attaining optimal C2 yields and selectivities at lower temperatures relative to the unpromoted materials. The degree
Korf, S.J., McNamara, D.J., Ommen, J.G. van, Ross, J.R.H., Seshan, K.   +4 more
core   +10 more sources

Functionalization of magnetic nanoparticles by creatine as a novel and efficient catalyst for the green synthesis of 2-amino-4H-chromene derivatives

Scientific Reports, 2022
By employing the naturally-originated molecule of creatine, Fe3O4@SiO2-creatine as an environmentally benign magnetic organometallic nanobiocatalyst was successfully prepared via a convenient and green route. Then to acquire an inclusive comprehension of
Reza Eivazzadeh-Keihan, Shahrzad Bahrami, Mostafa Ghafori Gorab, Zahra Sadat, Ali Maleki   +4 more
doaj   +1 more source

A diselenobis-functionalized magnetic catalyst based on iron oxide/silica nanoparticles suggested for amidation reactions

Scientific Reports, 2022
In this study, a new heterogeneous magnetic catalytic system based on selenium-functionalized iron oxide nanoparticles is presented and suggested for facilitating amide/peptide bonds formation.
Reza Taheri-Ledari, Fateme Sadat Qazi, Mahdi Saeidirad, Ali Maleki   +3 more
doaj   +1 more source

Recent Advances in Homogeneous Metal-Catalyzed Aerobic C–H Oxidation of Benzylic Compounds [PDF]

, 2018
Csp(3)-H oxidation of benzylic methylene compounds is an established strategy for the synthesis of aromatic ketones, esters, and amides. The need for more sustainable oxidizers has encouraged researchers to explore the use of molecular oxygen.
Domínguez Pérez, Pilar Esther, Herrero Corral, María Teresa, San Martín Faces, Raúl, Urgoitia Gabikaetxebarria, Garazi   +3 more
core   +3 more sources

Spectroscopic characterization of two peroxyl radicals during the O2-oxidation of the methylthio radical

Communications Chemistry, 2022
The atmospheric oxidation of dimethyl sulfide affects the Earth’s climate, but the intricate pathways of this complex reaction are still not fully described.
Zhuang Wu, Xin Shao, Bifeng Zhu, Lina Wang, Bo Lu, Tarek Trabelsi, Joseph S. Francisco, Xiaoqing Zeng   +7 more
doaj   +1 more source

Efficient and Green Synthesis of Acridinedione Derivatives Using Highly Fe₃O₄@Polyaniline-SO₃H as Efficient Heterogeneous Catalyst

Chemistry Proceedings, 2021
In the present investigation, an efficient heterogeneous catalyst system made of a polyaniline-derived polymer (Poly [anthranilic acid]-[N-(1′,3′-phenylenediamino) −3-butane sulfonate]) and iron oxide nanoparticles (Fe3O4 NPs) is presented. Firstly, this
Hossein Ghafuri, Shahram Moradi, Nastaran Ghanbari, Haniyeh Dogari, Mostafa Ghafori   +4 more
doaj   +1 more source

Palladium-bismuth intermetallic and surface-poisoned catalysts for the semi-hydrogenation of 2-methyl-3-butyn-2-ol [PDF]

, 2015
The effects of poisoning of Pd catalysts with Bi and annealing in a polyol (ethylene glycol) were studied on the semi-hydrogenation of 2-methyl-3-butyn-2-ol (MBY).
Anderson, James A., Cherkasov, Nikolay, Ibhadon, Alex O., Johnston, Shaun K., McCue, Alan J.   +4 more
core   +1 more source