نتایج جستجو برای: palladium pd

تعداد نتایج: 67611  

2016
Hoik Lee Duy-Nam Phan Myungwoong Kim Daewon Sohn Seong-Geun Oh Seong Hun Kim Ick Soo Kim

Palladium (Pd) metal is well-known for hydrogen sensing material due to its high sensitivity and selectivity toward hydrogen, and is able to detect hydrogen at near room temperature. In this work, palladium-doped carbon nanofibers (Pd/CNFs) were successfully produced in a facile manner via electrospinning. Well-organized and uniformly distributed Pd was observed in microscopic images of the res...

Journal: :Biomedicine and chemical sciences 2022

Six new complexes of palladium(II) with a general formula [Pd(L)2Cl2], where L = 2-amino-4-(4-subsistuted phenyl)thiazole. The palladium were prepared by the reaction phenyl)thiazole ligands Bis(benzonitrile)palladium(II) dichloride in chloroform solvent at molar ratio Pd:L=1:2. resulting characterized magnetic susceptibility, conductivity measurements, infrared, 1H NMR and thermo gravimetric a...

2015
Feyyaz DURAP Önder METİN

Addressed herein is the catalysis of monodisperse palladium nanoparticles (NPs) supported on chemically derived graphene (CDG) for the Suzuki–Miyaura cross-coupling of phenylboronic acid and various aryl halides. Monodisperse Pd NPs were synthesized by the solution phase reduction of palladium(II) acetylacetonate with morpholine borane complex in oleylamine and deposited on CDG via the liquid p...

2009
M. A. Barakat M. Hegazy F. Zahran

Hydrometallurgical recovery of nano-palladium (Pd) from spent Pd/Al2O3 catalyst has been investigated. The Pd content in the spent catalyst sample was assayed to be 0.42% while the remainder was mainly aluminum oxide. Mixture of HCl and AlCl3 was studied as leaching agent for the sample. The Pd was deposited with formic acid. Different parameters affecting leaching and deposition processes such...

Journal: :Chemical communications 2008
Juzo Oyamada Tsugio Kitamura

Palladium complexes with bidentate phosphine ligands, Pd(dppe)(OAc)(2) and Pd(dppm)(OAc)(2), were found to be effective catalysts for reactions of simple arenes with ethyl propiolate, affording arylbutadiene derivatives selectively.

1999
M. Daenen Ph. Rogiers C. Van de Walle F. Rochette M. Demedts B. Nemery

Occupational asthma caused by palladium. M. Daenen, Ph. Rogiers, C. Van de Walle, F. Rochette, M. Demedts, B. Nemery. #ERS Journals Ltd 1999. ABSTRACT: Occupational exposure to complex platinum salts is a well-known cause of occupational asthma. Although there is evidence that platinum refinery workers may also be sensitized to other precious metals, such as palladium or rhodium, no instances o...

2009
V. Violante F. Sarto S. Lecci D. L. Knies G. K. Hubler

A recent joint work [1] identified the crucial role of material science in improving control of the Pd-D system to enhance the production of excess power during electrochemical loading of palladium foils with deuterium. Very high reproducibility, close to 100%, in loading Pd up to D/Pd ~1 (atomic fraction) was achieved. High loading about the threshold value of 0.9 is considered necessary to ac...

Journal: :Dalton transactions 2014
Radomír Pilný Přemysl Lubal Lars I Elding

Complex formation between [Pd(H2O)4](2+) and oxalate (ox = C2O4(2-)) has been studied spectrophoto-metrically in aqueous solution at variable temperature, ionic strength and pH. Thermodynamic parameters at 298.2 K and 1.00 mol dm(-3) HClO4 ionic medium for the complex formation [Pd(H2O)4](2+) + H2ox ⇄ [Pd(H2O)2(ox)] + 2H3O(+) with equilibrium constant K1,H (in mol dm(-3)) are log10K1,H = 3.38 ±...

Journal: :Dental materials : official publication of the Academy of Dental Materials 1996
W A Brantley Z Cai E Papazoglou J C Mitchell S J Kerber G P Mann T L Barr

OBJECTIVE The purpose of this study was to use x-ray diffraction (XRD) to obtain new information about the oxide layers on four representative oxidized high-palladium alloys. METHODS Cast specimens of two Pd-Cu-Ga alloys and two Pd-Ga alloys, with both polished and etched surfaces and air-abraded surfaces, were subjected to oxidation procedures recommended by the manufacturers. The specimens ...

Journal: :Australian Journal of Chemistry 2023

Multistage mass spectrometry (MSn) experiments were used to explore extrusion–insertion (ExIn) reactions of the palladium complex [(phen)Pd(O2CPh)]+ (phen, 1,10-phenanthroline). Under collision-induced dissociation (CID) conditions, organopalladium cation [(phen)Pd(Ph)]+ was formed via decarboxylation and found react with phenylmethylketene yield enolate [(phen)Pd(CPhMeC(O)Ph)]+ an insertion re...

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