Results 41 to 50 of about 5,101 (224)

Organic Photoelectrochemical Cells Beyond Performance: Interface and Catalyst Engineering for Durability

Advanced Energy Materials, EarlyView.
Organic photoelectrochemical cells based on π‐conjugated semiconductors offer a versatile platform for solar fuel generation. This review outlines operating principles, device architectures, and key metrics, and highlights advances in p‐ and n‐type photoelectrodes, interfacial engineering, and catalyst integration.
Jaehyeong Kim, Jung Min Ha, Yeonjeong Lee, Seung Won Oh, Wangyeon Lee, Munsu Kwon, Soonyong Lee, Jin Young Kim, Han Young Woo   +8 more
wiley   +1 more source

"Supported Ziegler-Natta catalysts from MgCl2·nROH precursors and its catalytic behaviors for diene copolymerization"

Hecheng xiangjiao gongye
The precursor MgCl2 · nROH of supported Ziegler Natta catalyst was prepared by chemical activation method, and different pre catalysts TiCl4/MgCl2 (C-Cat) were prepared by loading TiCl4.
FAN Xun-zhang, ZHAO Yuan-jin, LUO Shu-fang, HE Ai-hua?
doaj   +1 more source

Visible‐Light Driven Acetylene Semi‐Hydrogenation to Ethylene With a Copper Photosensitizer and a Cobaloxime Catalyst

Chemistry – A European Journal, EarlyView.
A fully noble‐metal‐free photocatalytic system that couples cobaloxime catalysis with Cu photosensitizer for HAT‐driven acetylene‐to‐ethylene conversion is reported. ABSTRACT The purification of ethylene streams from acetylene impurities remains a key industrial challenge, for which light‐powered strategies are emerging as sustainable alternatives to ...
Anna Fortunato, Sharon Silloni, Brando Adranno, Marianna Barbieri, Luka Đorđević, Francesca Arcudi   +5 more
wiley   +1 more source

Electronic Structure, IR and UV-Vis Spectra of Some Suggested Ziegler-Natta Catalysts

Journal of Kufa-Physics, 2018
 Three aluminum metal complexes were suggested as Ziegler-Natta catalysts and studied theoretically at the ground and excited states. Becke’s three parameter exchange with Lee, Yang, and Parr correlation functional) density functional theory and SDD ...
Faeq A. AL-Temimeia, Hamid I. Abboodb
doaj   +1 more source

Reactions of (Arylimido)vanadium(V)–Trialkyl Complexes with Phenols: Effects of Arylimido Ligands and Phenols for Formation of the Vanadium Phenoxides [PDF]

, 2019
Reactions of a series of (arylimido)vanadium(V) trialkyl complexes, V(NAr′)(CH_2SiMe_3)_3 (Ar′ = C_6H_5, 2-MeC_6H_4, 2,6-Me_2C_6H_3, 2,6-Cl_2C_6H_3), with various phenols (ArOH, Ar = 2,6-F_2C_6H_3, 2,6-Cl_2C_6H_3, 2,6-Me_2C_6H_3, 2,6-^iPr_2C_6H_3, 2 ...
Hayashibara, Hitomi, Ngamnithiporn, Aurapat, Nomura, Kotohiro   +2 more
core   +4 more sources

“Naked” Divalent Metal Cations Stabilized by Weakly Coordinating Anions: Syntheses, Properties, and Emerging Applications

European Journal of Inorganic Chemistry, Volume 29, Issue 14, 14 May 2026.
The preparation of soluble and stable metal M2+ dications only stabilized by weakly coordinating anions, that is, M[WCA]2 salts, is an emerging field that, beyond its fundamental interest, holds promise in reactivity due to the high electrophilicity of the central M2+ center.
Samuel Dagorne, Béatrice Jacques, Geetika Gupta, Rudolf J. Wehmschulte   +3 more
wiley   +1 more source

Síntese de catalisadores Ziegler-Natta: algumas rotas e suas dificuldades Synthesis of Ziegler-Natta catalysts: some routes and their difficulties

Química Nova, 1997
The Ziegler-Natta catalyst and the polymerization thereof are systems which require careful handling and special treatment of chemicals. In spite of the use of inert atmosphere and dry chemicals, some Ziegler-Natta systems may present low activities or ...
Thaís H. S. Costa, Marcos A. S. Costa, Luiz Claudio de Santa Maria, Fernanda M. B. Coutinho, Neusa M. T. Pires   +4 more
doaj   +1 more source

Probing into morphology evolution of magnesium ethoxide particles as precursor of Ziegler-Natta catalysts [PDF]

Polyolefins Journal, 2016
Mg(OEt)2 with spherical morphology is one of the most important precursors for the preparation of industrial Ziegler-Natta catalysts. In the present article, morphology evolution of Mg(OEt)2 particles is studied in the course of the synthesis.
Goond Hongmanee, Patchanee Chammingkwan, Toshiaki Taniike, Minoru Terano   +3 more
doaj   +1 more source

Process Modeling for Propylene Polymerization to Transfer Reaction Kinetics From Lab to Plant

Chemie Ingenieur Technik, Volume 98, Issue 5, Page 254-261, May 2026.
The modeling approach combines an industrial model for a fourth‐generation Ziegler–Natta catalyst with lab‐scale derived kinetics of a novel fifth‐generation catalyst. By transferring intrinsic kinetics across scales, polypropylene production can be predicted. Accurate melt flow rate prediction is only obtained with an additional adjustment.
Anna Konopka, Matthias Feigel, Johanna Fernengel, Maximilian Dochnahl, Richard W. Fischer, Olaf Hinrichsen   +5 more
wiley   +1 more source

Sixtieth Anniversary of Ziegler-Natta Catalysts and Stereospecific Polymerization [PDF]

Kemija u Industriji, 2015
This review article highlights the history of the discoveries of organometallic catalysts and stereospecific polymerization of α-olefins, dienes and a number of vinyl monomers by Karl Ziegler and Giulio Natta sixty years ago, their developments and ...
Janović Z. , Veksli Z.
doaj