scholarly journals Radiolytic Synthesis of Pt-Ru Catalysts Based on Functional Polymer-Grafted MWNT and Their Catalytic Efficiency for CO and MeOH

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Dae-Soo Yang ◽  
Kwang-Sik Sim ◽  
Hai-Doo Kwen ◽  
Seong-Ho Choi
Keyword(s):  
Catalytic Efficiency ◽  
Multiwalled Carbon ◽  
Ru Catalysts ◽  
Functional Polymer ◽  
Co Stripping ◽  
Ru Nanoparticles ◽  
Direct Methanol ◽  
Radiation Induced ◽  
Electro Oxidation ◽  
Methanol Fuel Cell

Pt-Ru catalysts based on functional polymer-grafted MWNT (Pt-Ru@FP-MWNT) were prepared by radiolytic deposition of Pt-Ru nanoparticles on functional polymer-grafted multiwalled carbon nanotube (FP-MWNT). Three different types of functional polymers, poly(acrylic acid) (PAAc), poly(methacrylic acid) (PMAc), and poly(vinylphenyl boronic acid) (PVPBAc), were grafted on the MWNT surface by radiation-induced graft polymerization (RIGP). Then, Pt-Ru nanoparticles were deposited onto the FP-MWNT supports by the reduction of metal ions usingγ-irradiation to obtain Pt-Ru@FP-MWNT catalysts. The Pt-Ru@FP-MWNT catalysts were then characterized by XRD, XPS, TEM ,and elemental analysis. The catalytic efficiency of Pt-Ru@FP-MWNT catalyst was examined for CO stripping and MeOH oxidation for use in a direct methanol fuel cell (DMFC). The Pt-Ru@PVPBAc-MWNT catalyst shows enhanced activity for electro-oxidation of CO and MeOH oxidation over that of the commercial E-TEK catalyst.

Synthesis of Bimetallic Pt–Ru Nanoparticles by Bioreduction Using Shewanella algae for Application to Direct Methanol Fuel Cell

2016 ◽  
Vol 49 (5) ◽  
pp. 488-492 ◽  
Author(s):  
Noriaki Sano ◽  
Yuta Nakanishi ◽  
Kazuki Sugiura ◽  
Hiroyuki Yamanaka ◽  
Hajime Tamon ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Ru Nanoparticles ◽  
Shewanella Algae ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Methanol electro-oxidation and direct methanol fuel cell using Pt/Rh and Pt/Ru/Rh alloy catalysts

2004 ◽  
Vol 50 (2-3) ◽  
pp. 787-790 ◽  
Author(s):  
Jong-Ho Choi ◽  
Kyung-Won Park ◽  
In-Su Park ◽  
Woo-Hyun Nam ◽  
Yung-Eun Sung
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Direct Methanol ◽  
Electro Oxidation ◽  
Methanol Fuel Cell ◽  
Alloy Catalysts

scholarly journals Use of Dendrimers during the Synthesis of Pt-Ru Electrocatalysts for PEM Fuel Cells: Effects on the Physical and Electrochemical Properties

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
J. C. Calderón ◽  
L. Calvillo ◽  
M. J. Lázaro ◽  
E. Pastor
Keyword(s):  
Fuel Cells ◽  
Direct Methanol Fuel Cells ◽  
Pem Fuel Cells ◽  
X Ray Diffraction ◽  
X Ray ◽  
Co Stripping ◽  
Ru Nanoparticles ◽  
Treatment Benefits ◽  
Heat Treated ◽  
Direct Methanol

In this work, Pt-Ru catalysts were synthesized by a novel methodology which includes the use as encapsulating molecules of dendrimers of different generation: zero (DN-0), one (DN-1), two (DN-2), and three (DN-3). Synthesized catalysts were heat-treated at 350°C, and the effects of this treatment was established from the physical (X-ray dispersive energy (XDE) and X-ray diffraction (XRD)) and electrochemical characterization (cyclic voltammetry and chronoamperometry). Results showed that the heat-treatment benefits the catalytic properties of synthesized materials in terms of CO and methanol electrochemical oxidation. The curves for CO stripping were more defined for heat-treated catalysts, and methanol oxidation current densities were higher for these materials. These changes are principally explained from the removal of organic residues remaining on the surface of the Pt-Ru nanoparticles after the synthesis procedure. After the activation of the catalysts by heating at 350°C, the real importance of the use of these encapsulating molecules and the effect of the generation of the dendrimer become visible. From these results, it can be concluded that synthesized catalysts are good catalytic anodes for direct methanol fuel cells (DMFCs).

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