نتایج جستجو برای: palladium nanoparticles pd nps

تعداد نتایج: 176490  

Journal: :ASEAN Engineering Journal 2021

2,5-Furan dicarboxylic acid (FDCA) is a bio-based chemical used as feedstock for wide range of industrial applications - particularly the bioplastic industries. It derived from 5-hydroxymethylfurfural (HMF) through reaction oxidation using either homogeneous or heterogeneous catalysts. According to advantages catalysts, this research aims seek novel catalyst type with high selectivity and activ...

2012
Simon De Corte Tom Hennebel Bart De Gusseme Willy Verstraete Nico Boon

While precious metals are available to a very limited extent, there is an increasing demand to use them as catalyst. This is also true for palladium (Pd) catalysts and their sustainable recycling and production are required. Since Pd catalysts exist nowadays mostly under the form of nanoparticles, these particles need to be produced in an environment-friendly way. Biological synthesis of Pd nan...

H. Khojasteh, I. Mohammadpoor-Baltork M. Moghadam S. Tangestaninejad V. Mirkhani

Palladium is the best metal catalyst for Suzuki cross coupling reaction for synthesize of unsymmetrical biaryl compounds. But its high cost limits its application in wide scale. Using of nanoscale particles as active catalytic cites is a good approach for reducing needed noble metal. By loading precious nanoparticles on magnetic nanocores as a support, recycling and reusing of catalyst will be ...

Journal: :Organic & biomolecular chemistry 2011
Babak Karimi Dawood Elhamifar James H Clark Andrew J Hunt

The application of a novel palladium containing ionic liquid based periodic mesoporous organosilica (Pd@PMO-IL) catalyst in the aerobic oxidation of primary and secondary alcohols under molecular oxygen and air atmospheres is investigated. It was found that the catalyst is quite effective for the selective oxidation of several activated and non-activated alcoholic substrates. The catalyst syste...

Journal: :Nanoscale 2015
Hyunje Woo Ji Chan Park Sungkyun Park Kang Hyun Park

A facile synthesis of rose-like Pd-Fe3O4 nanocomposites via controlled thermal decomposition of Fe(CO)5 and reduction of Pd(OAc)2, followed by the immobilization of Au nanoparticles (NPs) onto the Pd-Fe3O4 supports, is reported. The morphology of these hybrid nanostructures could be easily controlled by varying the amount of Fe(CO)5 and the reaction temperature. Moreover, the synthesized Au/Pd-...

2015
Byungjin Cho Jongwon Yoon Sung Kwan Lim Ah Ra Kim Sun-Young Choi Dong-Ho Kim Kyu-Hwan Lee Byoung Hun Lee Heung Cho Ko Myung Gwan Hahm

We have investigated the effects of metal decoration on the gas-sensing properties of a device with two-dimensional (2D) molybdenum disulfide (MoS₂) flake channels and graphene electrodes. The 2D hybrid-structure device sensitively detected NO₂ gas molecules (>1.2 ppm) as well as NH₃ (>10 ppm). Metal nanoparticles (NPs) could tune the electronic properties of the 2D graphene/MoS₂ device, increa...

2011
Ondrej Cernohorsky Karel Zdansky Jiri Zavadil Pavel Kacerovsky Katerina Piksova

Layers of palladium (Pd) nanoparticles on indium phosphide (InP) were prepared by electrophoretic deposition from the colloid solution of Pd nanoparticles. Layers prepared by an opposite polarity of deposition showed different physical and morphological properties. Particles in solution are separated and, after deposition onto the InP surface, they form small aggregates. The size of the aggrega...

2014
Zheye Zhang Fei Xiao Jiangbo Xi Tai Sun Shuang Xiao Hairong Wang Shuai Wang Yunqi Liu

Double-shelled hollow carbon spheres with reduced graphene oxide (RGO) as inner shell and carbon (C) layer as outer shell have been successfully designed and prepared. This tailor-making structure acts as an excellent capsule for encapsulating with ultrafine Pd nanoparticles (Pd NPs), which could effectively prevent Pd NPs from aggregation and leaching. As a result, the as-obtained RGO@Pd@C nan...

Journal: :Molecules 2010
Antonio Monopoli Angelo Nacci Vincenzo Calò Francesco Ciminale Pietro Cotugno Annarosa Mangone Lorena Carla Giannossa Pietro Azzone Nicola Cioffi

Palladium nanoparticles have been electrochemically supported on zirconium oxide nanostructured powders and all the nanomaterials have been characterized by several analytical techniques. The Pd/ZrO(2) nanocatalyst is demonstrated to be a very efficient catalyst in Heck, Ullmann, and Suzuki reactions of aryl halides in water. The catalyst efficiency is attributed to the stabilization of Pd nano...

Journal: :Dalton transactions 2011
Yinghuai Zhu Li Chuanzhao Algin Oh Biying Meriska Sudarmadji Anqi Chen Dang Thanh Tuan Abdul M Seayad

Well-dispersed palladium (0) nanoparticles stabilized with phosphonium based ionic liquid were synthesized conveniently and fully characterized. A catalyst system comprising of the Pd(0) nanoparticles and a base was found to be recyclable and efficient for the aminocarbonylation reaction of aryl iodide in ionic liquid media. In the presence of potassium tert-butyloxide, for the relatively stabl...

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