scholarly journals Methanol Oxidation on Graphenic-Supported Platinum Catalysts

Surfaces ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 16-31 ◽  
Author(s):  
Gladys Arteaga ◽  
Luis M. Rivera-Gavidia ◽  
Sthephanie J. Martínez ◽  
Rubén Rizo ◽  
Elena Pastor ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Methanol Oxidation ◽  
Photoelectron Spectroscopy ◽  
Oxidation Reaction ◽  
Catalyst Support ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Methanol Oxidation Reaction ◽  
X Ray ◽  
Supported Platinum Catalysts

Graphene oxide (GO), reduced graphene oxide by thermal treatment (rGO-TT), nitrogen-modified rGO (N-rGO), and carbon Vulcan were synthesized and employed in the current work as catalyst support for Pt nanoparticles, to study their properties and impact toward the methanol oxidation reaction (MOR) in sulfuric acid medium. Several physicochemical techniques, such as X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), Transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), Raman, and elemental analysis were employed to characterize the novel materials, while potentiodynamic and potentiostatic methods were used to study catalytic performance toward the methanol oxidation reaction in acidic medium. The main results indicate a high influence of the support on the surface electronic state of the catalyst, and consequently the catalytic performance toward the MOR is modified. Accordingly, Pt/N-rGO and Pt/rGO-TT show the lowest and the highest catalytic performance toward the MOR, respectively.

Core-Shell Au-Pt Nanoparticles and Nanodendrites for Methanol Oxidation Reaction

2017 ◽  
Vol 1142 ◽  
pp. 234-237
Author(s):  
Hui Liu ◽  
Yan Feng ◽  
Jun Yang
Keyword(s):  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Au Nanoparticles ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Methanol Oxidation Reaction ◽  
Core Shell ◽  
Molar Ratios ◽  
The Core ◽  
Growth Method

Controlling the morphology of platinum (Pt)-based nanomaterials is an effective strategy to enhance their catalytic performance for a given reaction. Here we report the syntheses of bimetallic Au-Pt nanomaterials with spherical or dendritic morphologies by a seed-mediated growth method. In this route, the gold (Au) nanoparticles are firstly prepared as seeds in oleylamine, which are subsequently seeded the growth of regular or dendritic Pt shells at different Au/Pt molar ratios. The electrochemical measurements show that the core-shell Au-Pt nanodendrites have better catalytic activity than that of core-shell Au-Pt nanoparticles for methanol oxidation reaction due to their abundant atomic steps, edges, and corner atoms in the branched Pt shells.

Pt nanoparticles anchored over Te nanorods as a novel and promising catalyst for methanol oxidation reaction

2019 ◽  
Vol 55 (75) ◽  
pp. 11247-11250 ◽  
Author(s):  
Xudong Yang ◽  
Jia Xue ◽  
Ligang Feng
Keyword(s):  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Methanol Oxidation Reaction ◽  
Alkaline Electrolytes ◽  
Excellent Catalytic Performance

Pt/Te nanorods exhibited excellent catalytic performance for methanol oxidation in both acidic and alkaline electrolytes.

scholarly journals Synthesis and Characterization of Te Nanotubes Decorated with Pt Nanoparticles for Fuel Cell Anode/Cathode Working at Neutral pH

2019 ◽  
Author(s):  
Maria Rachele Guascito ◽  
Daniela Chirizzi ◽  
Emanuela Filippo ◽  
Francesco Milano ◽  
Antonio Tepore
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Photoelectron Spectroscopy ◽  
High Efficiency ◽  
Pt Nanoparticles ◽  
Synthesis And Characterization ◽  
Methanol Oxidation Reaction ◽  
X Ray

In fuel-cell technological development, one of the most important objectives is to minimize the amount of Pt, the most employed material as oxygen reduction and methanol oxidation electro-catalyst. In this paper we report the synthesis and characterization of Te nanotubes (TeNTs) decorated with Pt nanoparticles, readily prepared from stirred aqueous solutions of PtCl2 containing a suspension of TeNTs and ethanol acting as a reducing agent, avoiding the use of any hydrophobic surfactants as capping stabilizing substance. The as obtained TeNTs decorated with Pt nanoparticles (TeNTs/PtNPs) have been fully characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area diffraction patterns (SAD), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV). We demonstrate that the new material can be successfully employed in fuel cell either as anodic (for methanol oxidation reaction) and cathodic (for oxygen reduction reaction) electrode with high efficiency in terms of related mass activities and on-set improvement. Remarkably, the cell operates in aqueous electrolyte buffered at pH 7.0, thus avoiding acidic or alkaline conditions that may lead e. g. to Pt dissolution (at low pH) and paving the way for the development of biocompatible devices and on chip fuel cells.

Catalytic performance of non-alloyed bimetallic PtAu electrocatalysts for methanol oxidation reaction

2017 ◽  
Vol 42 (51) ◽  
pp. 30109-30118 ◽  
Author(s):  
Yuan-Yuan Feng ◽  
Gui-Hua Song ◽  
Qiang Zhang ◽  
Hua-Shuai Hu ◽  
Mei-Ying Feng ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Catalytic Performance ◽  
Methanol Oxidation Reaction

Carbon Supported Pt+Os Catalysts for Methanol Oxidation

2002 ◽  
Vol 57 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Gülsün Gökağaç ◽  
Brendan J. Kennedy
Keyword(s):  
Methanol Oxidation ◽  
Photoelectron Spectroscopy ◽  
Surface Composition ◽  
Carbon Support ◽  
Methanol Oxidation Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Metal Metal ◽  
Metal Support

11% Pt/C, 10% Pt + 1%Os/C, 9% Pt + 2%Os/C, 8% Pt + 3%Os/C, 7% Pt + 4%Os/C, 6% Pt + 5%Os/C and 5%Pt + 6% Os/C catalysts have been prepared for methanol oxidation reaction. Transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction and cyclic voltammetry have been used to understand the nature of the species present in these catalysts. 7% Pt + 4% Os/C was the most active catalyst, while 8% Pt + 3% Os/C was the least active one. It is found that the metal particle size and distribution on the carbon support, the surface composition and the oxidation states of the metal particles, the metal-metal and metal support interactions are important parameters to define the activity of the catalyst.

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