Preparation and characterization of polysiloxane networks containing metallic platinum particles

2015 ◽  
Vol 133 (10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Edyta Stochmal ◽  
Joanna Strzezik ◽  
Agnieszka Krowiak
Keyword(s):  
Metallic Platinum ◽  
Platinum Particles

Preparation and Characterization of Pt/Superfine Mesocarbon Microbead Powers Electrocatalysts

2005 ◽  
Vol 3 (3) ◽  
pp. 358-360 ◽  
Author(s):  
Jia Rong-Li ◽  
Wang Cheng-Yang ◽  
Zhu Bin
Keyword(s):  
Reduction Method ◽  
Direct Methanol Fuel Cells ◽  
Electrochemical Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Platinum Particles ◽  
Platinum Electrocatalyst ◽  
Direct Methanol

Superfine mesocarbon microbead powders (SFMCMBs) as the new supports for platinum electrocatalysts were first investigated. The Pt∕SFMCMB electrocatalysts were prepared by an impregnation-reduction method, with hexachloroplatinic acid as the platinum precursor and formaldehyde as the reducing agent. The catalysts were characterized with x-ray diffraction (XRD), field emission gun transmission electron microscope (TEM), and electrochemical analysis. TEM photos showed the platinum particles were dispersed uniformly on the surface of SFMCMBs and there existed a little aggregation of platinum particles in the Pt∕SFMCMB catalysts. The TEM photos showed the existence of the platinum on the supports where the average platinum particle size were 4-6nm. The electrochemical analysis proved that SFMCMBs are excellent candidates to be used as the support of platinum electrocatalyst for methanol electrochemical oxidation as the potential catalyst candidate for direct methanol fuel cells (DMFCs).

Synthesis and characterization of nanoporous metallic platinum

2005 ◽  
Vol 253 (1-3) ◽  
pp. 199-202 ◽  
Author(s):  
Michihiro Asai ◽  
Toshinari Onoe ◽  
Hirofumi Kanoh ◽  
Katsumi Kaneko
Keyword(s):  
Synthesis And Characterization ◽  
Metallic Platinum

scholarly journals Electrochemical and microstructural characterization of platinum supported on glassy carbon

2007 ◽  
Vol 61 (3) ◽  
pp. 135-141
Author(s):  
Sanja Terzic ◽  
Vladislava Jovanovic ◽  
Dusan Tripkovic ◽  
Andrzej Kowal ◽  
Jerzy Stoch
Keyword(s):  
Methanol Oxidation ◽  
Glassy Carbon ◽  
Microstructural Characterization ◽  
Electrochemical Treatment ◽  
Organic Residues ◽  
Remarkable Effect ◽  
Platinum Particles ◽  
Order Of Magnitude

The effect of the electrochemical oxidation of glassy carbon on the deposition of platinum particles and the electrocatalytic activity of platinum supported on oxidized glassy carbon were studied for methanol oxidation in H2SO4 solution. Platinum was potentiostatically deposited from H2SO4 + 6mM H2PtCl6 solution. Glassy carbon was anodically polarized in 1 M NaOH at 1.41 V (SCE) for 35 and 95 s and in 0.5 M H2SO4 at 2V (SCE) for 35; 95 s and 2.25 V for 35 and 95 s. Electrochemical treatment of the GC support leads to a better distribution of platinum on the substrate and has remarkable effect on the activity. The activity of the Pt/GCox electrode for methanol oxidation is larger than that of polycrystalline Pt and by more than one order of magnitude larger than that of a Pt/GC electrode. This increase in activity indicates the pronounced role of the organic residues of the GC support on the properties of Pt particles deposited on glassy carbon.

Characterization of mono- and bi-metallic platinum catalysts using CO FTIR spectroscopy Size effects and topological segregation

1997 ◽  
Vol 93 (20) ◽  
pp. 3715-3720 ◽  
Author(s):  
Louis-Charles de Me´norval ◽  
Abdellah Chaqroune ◽  
Bernard Coq ◽  
and François Figueras
Keyword(s):  
Ftir Spectroscopy ◽  
Size Effects ◽  
Platinum Catalysts ◽  
Metallic Platinum

Preparation and Characterization of Platinum Nanorods Using Ascorbic Acid as the Reducing Agent

2013 ◽  
Vol 774-776 ◽  
pp. 577-580 ◽  
Author(s):  
Ming Yang ◽  
Juan Juan Xia
Keyword(s):  
Ascorbic Acid ◽  
Room Temperature ◽  
Average Length ◽  
Decisive Role ◽  
Photoelectron Spectra ◽  
Direct Reaction ◽  
X Ray ◽  
Platinum Particles ◽  
Scanning Electron

Nanorods of platinum with an average length of 500-1000nm have been prepared by a simple reaction between H2PtCl6·6H2O and ascorbic acid in the presence of deionized gelatin at room temperature. Gelatin played a decisive role as an inhibitor of the direct reaction of ascorbic acid with H2PtCl6·6H2O and coagulation of the growing platinum in producing the nanorods. In the absence of gelatin, we can only obtain irregular large platinum particles. The products were characterized by X-ray powder diffraction, scanning electron microscope and X-ray photoelectron spectra.

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