نتایج جستجو برای: Pt nanoparticles

تعداد نتایج: 151395  

Journal: :journal of physical & theoretical chemistry 2009
m. yari s. sedaghat

metal—polyaniline nanocomposites such as platinum-polyaniline nanocomposite is prepared by insitu oxidative polymerization of aniline and reduction of pt+4 ions into pt nanoparticles. thepolymerization of aniline was carried out in the presence of 1(2ptcn6 [potassium hexa cyanoplatinate (iv)] as oxidizing agent. during the reaction aniline monomers undergo oxidation andform polyaniline (pant) w...

Journal: :iranian journal of hydrogen & fuel cell 2015
serveh ghaderi biuck habibi

core-shell nanostructures are emerging as more important materials than alloy nanostructures and have much more interesting potential applications in various fields. in this work, we demonstrated the fast and facile synthesis of core-shell nanoparticles consisting of pt thin layer as the shell and ni nanoparticles as the cores. the described method herein is suitable for large-scale and low-cos...

Journal: :The Journal of chemical physics 2004
Guofeng Wang M A Van Hove P N Ross M I Baskes

We have investigated the segregation of Pt atoms to the surfaces of Pt-Re nanoparticles using the Monte Carlo method and modified embedded-atom method potentials that we have developed for Pt-Re alloys. The Pt(75)Re(25) nanoparticles (containing from 586 to 4,033 atoms) are assumed to have disordered fcc configurations and cubo-octahedral shapes (terminated by [111] and [100] facets), while the...

Journal: :iranian journal of chemistry and chemical engineering 0
biuck habibi electroanalytical chemistry laboratory, department of chemistry, faculty of sciences, azarbaijan shahid madani university, tabriz, i.r. iran serveh ghaderi electroanalytical chemistry laboratory, department of chemistry, faculty of sciences, azarbaijan shahid madani university, tabriz, i.r. iran

in the present work, the electrooxidation of formic acid and formaldehyde; potentially important fuels for future fuel cells, was investigated on the fe3o4@pt core-shell nanoparticles/carbon-ceramic electrode (fe3o4@pt/cce). the fe3o4@pt nanoparticles were prepared via a simple and fast chemical method and their surface morphology, nanostructure properties, chemical composition, crystal phase, ...

Core-shell nanostructures are emerging as more important materials than alloy nanostructures and have much more interesting potential applications in various fields. In this work, we demonstrated the fast and facile synthesis of core-shell nanoparticles consisting of Pt thin layer as the shell and Ni nanoparticles as the cores. The described method herein is suitable for large-scale and low-cos...

2017
Feng Li Bo Cao Wenxi Zhu Hua Song Keliang Wang Cuiqin Li Leonarda F. Liotta

Carbon nanotubes (CNTs)-supported Pt nanoparticles were prepared with selective deposition of Pt nanoparticles inside and outside CNTs (Pt–in/CNTs and Pt–out/CNTs). The effects of Pt loading and reaction solvents on phenol hydrogenation were investigated. The Pt nanoparticles in Pt–in/CNTs versus Pt–out/CNTs are smaller and better dispersed. The catalytic activity and reuse stability toward phe...

Journal: :Chemical communications 2008
Juan Xu Xuebin Yu Zhiqing Zou Zhilin Li Zhu Wu Daniel L Akins Hui Yang

The catalytic dehydrogenation of LiBH(4) doped with exceptionally low quantities of carbon-supported Pt nanoparticles can be improved significantly, and smaller Pt nanoparticles result in greater enhanced catalytic dehydrogenation of LiBH(4) than do larger Pt nanoparticles.

2012
QIANQIAN LIU LIFENG DONG Lifeng Dong

Submitted for the MAR11 Meeting of The American Physical Society DNA-Templated Synthesis of Pt Nanoparticles on Single-Walled Carbon Nanotubes and their Electrocatalytic Properties QIANQIAN LIU, LIFENG DONG1, Missouri State University — Platinum (Pt) supported on singlewalled carbon nanotubes is one of the most efficient catalysts for both methanol and ethanol electroxidations. However, there i...

Journal: :Physical chemistry chemical physics : PCCP 2016
Paul C Jennings Steen Lysgaard Heine A Hansen Tejs Vegge

Ternary Pt-Au-M (M = 3d transition metal) nanoparticles show reduced OH adsorption energies and improved activity for the oxygen reduction reaction (ORR) compared to pure Pt nanoparticles, as obtained by density functional theory. The strain and ligand effects in nanoparticles are decoupled and correlated with the extended Pt(111) surface for benchmarking. The ternary metal in the core allows f...

Journal: :Chemical communications 2015
Chunyu Chen Fang Chen Ling Zhang Shuxiang Pan Chaoqun Bian Xiaoming Zheng Xiangju Meng Feng-Shou Xiao

Size-controllable Pt nanoparticles ranging from 1.3 to 2.3 nm were successfully loaded onto ZSM-5 (Pt-x/ZSM-5, where x is the mean diameter of the Pt nanoparticles). Catalytic tests in complete oxidation of toluene as a model for VOC removal show that Pt-1.9/ZSM-5 has the highest activity, due to a balance of Pt dispersion and Pt(0) proportion.

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید