A Comparative Investigation of the Electrocatalytic Oxidation of Methanol on Pt Modified TiO2 Nanotube Electrodes with Two Methods

2014 ◽  
Vol 521 ◽  
pp. 586-590
Author(s):  
Yong Ping Luo ◽  
Shun Jian Xu ◽  
Zong Hu Xiao ◽  
Yong Huang ◽  
Wei Zhong ◽  
...  
Keyword(s):  
High Performance ◽  
Direct Methanol Fuel Cells ◽  
Comparative Investigation ◽  
Electrolytic Deposition ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxidation Of Methanol ◽  
Direct Methanol ◽  
Electro Catalytic Oxidation ◽  
Electro Catalytic Activity

In this work, it was investigated and compared that electro-catalytic oxidation of methanol in acidic medium at TiO2nanotube (TNT) electrode modified by platinum (Pt) with two methods. Pt modified TNT electrodes were prepared by thermal decomposition (TD) and electrolytic deposition (ED). The so-prepared TD-Pt/TNT and ED-Pt/TNT electrodes were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Electrochemical investigations indicate that ED-Pt/TNT has higher electro-catalytic activity and better tolerance to poisoning species in methanol oxidation than TD-Pt/TNT, which can be ascribed to the higher dispersion and stability of ED-Pt than TD-Pt on TNT electrode. The present work provides some basis for the design of high performance catalysts for direct methanol fuel cells.

TiO2 Nanotube Film as the Support of Platinum Electro-Catalyst with Enhanced Electrochemical Activity for Methanol Oxidation

2013 ◽  
Vol 750-752 ◽  
pp. 1696-1699
Author(s):  
Yong Ping Luo ◽  
Shun Jian Xu ◽  
Wei Zhong ◽  
Zong Hu Xiao
Keyword(s):  
Methanol Oxidation ◽  
Present Method ◽  
High Performance ◽  
Direct Methanol Fuel Cells ◽  
High Dispersion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Scanning Electron

A facile method to prepare well-dispersed Platinum nanoparticles (Pt NPs) on FTO and TiO2 nanotube (TNTs) film was reported. The so-prepared Pt/FTO and Pt/TNT film electrodes are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD). The results show Pt NPs have been dispersed on the supporting matrixs uniformly. Electrochemical investigations indicate that Pt/TNT has higher electrocatalytic activity and better tolerance to poisoning species in methanol oxidation than Pt/FTO, which can be ascribed to the high dispersion of Pt NPs on the TiO2 nanotubes surface. The present method is promising for the design of high performance catalysts for direct methanol fuel cells.

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).

PtRu, PtRuFe and PtRuNi alloy electrocatalysts decorated on composite support C-MWCNTs for direct methanol fuel cells

2021 ◽  
Vol 11 (1) ◽  
pp. 94-98
Author(s):  
Quan Dang Long ◽  
An Nguyen Minh ◽  
Vinh Thach Phuc ◽  
Ngan Nguyen Thi Thanh ◽  
Lil Owin Khưu ◽  
...  
Keyword(s):  
Direct Methanol Fuel Cells ◽  
Methanol Oxidation Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Composite Support ◽  
Transmission Electron ◽  
Direct Methanol ◽  
Co Reduction ◽  
Alloy Catalysts ◽  
Better Than

In this work, carbon Vulcan XC-72 (C) and carbon nanotubes (CNTs) supported ternary platinum-ruthenium-iron (PtRuFe) and platinum-ruthenium-nickel (PtRuNi) alloy nanoparticles have been synthesized by a co-reduction method. The catalyst samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and cyclic voltammetry (CV). The results show that ternary alloy catalysts are always better than binary alloy catalysts. In particular, PtRuNi is the best catalyst for methanol oxidation reaction. 

scholarly journals Facile and Rapid Synthesis of Ultrafine PtPd Bimetallic Nanoparticles and Their High Performance toward Methanol Electrooxidation

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Tiantian Xia ◽  
Hanrui Shen ◽  
Gang Chang ◽  
Yuting Zhang ◽  
Honghui Shu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Performance ◽  
Direct Methanol Fuel Cells ◽  
Bimetallic Nanoparticles ◽  
Methanol Electrooxidation ◽  
X Ray ◽  
Transmission Electron ◽  
Composition And Structure ◽  
Direct Methanol

Uniform and sub-10 nm size bimetallic PtPd nanoparticles (NPs) have been synthesized via a simple and facile method without using any surfactants at an ambient temperature. As a green and clean reductive agent, ascorbic acid (AA) was employed for the coreduction of K2PtCl4and K2PdCl4in aqueous solution. The morphology, composition, and structure of PtPd NPs had been characterized by transmission electron microscopy (TEM), field emission high resolution transmission electron microscopy (FE-HRTEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscope (XPS). Comparing with both the monometallic Pt and Pd, the as-prepared alloy nanoparticles show superior electrocatalytic activity and better tolerance against poisoning by intermediates generated during methanol electrooxidation, which makes them a promising electrocatalysts for direct methanol fuel cells (DMFCs). Meanwhile, the green and simple approach could be easily extended to the manufacture of bimetallic or trimetallic alloy nanomaterials.

Optimization of Mesh-Based Anodes for Direct Methanol Fuel Cells

2010 ◽  
Vol 7 (3) ◽  
Author(s):  
Raghuram Chetty ◽  
Keith Scott ◽  
Shankhamala Kundu ◽  
Martin Muhler
Keyword(s):  
Thermal Decomposition ◽  
Fuel Cell ◽  
Methanol Oxidation ◽  
Photoelectron Spectroscopy ◽  
Direct Methanol Fuel Cells ◽  
Linear Sweep Voltammetry ◽  
Effect Of Temperature ◽  
X Ray ◽  
Oxidation Of Methanol ◽  
Direct Methanol

Platinum based binary and ternary catalysts were prepared by thermal decomposition onto a titanium mesh and were evaluated for the anodic oxidation of methanol. The binary Pt:Ru catalyst with a composition of 1:1 gave the highest performance for methanol oxidation at 80°C. The effect of temperature and time for thermal decomposition was optimized with respect to methanol oxidation, and the catalysts were characterized by cyclic voltammetry, linear sweep voltammetry, scanning electron microscopy, X-ray diffraction studies, and X-ray photoelectron spectroscopy. The best catalyst was evaluated in a single fuel cell, and the effect of methanol concentration, temperature, and oxygen/air flow was studied. The mesh-based fuel cell, operating at 80°C with 1 mol dm3 methanol, gave maximum power densities of 38 mW cm−2 and 22 mW cm−2 with 1 bar (gauge) oxygen and air, respectively.

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).

scholarly journals Electrosynthesis and Characterization of Novel CNx-HMMT Supported Pd Nanocomposite Material for Methanol Electro-Oxidation

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3578
Author(s):  
Faizah Altaf ◽  
Rohama Gill ◽  
Patrizia Bocchetta ◽  
Rida Batool ◽  
Muhammad Usman Hameed ◽  
...  
Keyword(s):  
Direct Methanol Fuel Cells ◽  
Research Work ◽  
Pd Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nitrogen Doped ◽  
Composite Nanomaterial ◽  
Electrochemically Deposited ◽  
Direct Methanol

In the current research work, palladium (Pd) nanoparticles were electrochemically deposited on a nitrogen doped montmorillonite (CNx-MMT) support using the underpotential deposition (UPD) method. The prepared Pd based composite electrode was studied as an electrocatalyst for methanol fuel oxidation. The catalysts and the supporting materials montmorillonite, acid activated montmorillonite, and nitrogen doped montmorillonite (MMT, HMMT and CNx-HMMT) were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) and electrochemical characterization by cyclic voltammetry (CV). The results indicated that Pd supported on CNx-HMMT possesses enhanced electrocatalytic activity and stability compared to commercial Pd/C, which was attributed to its higher electrochemical surface area (ECSA) (23.00 m2 g−1). The results demonstrated the potential application of novel Pd/CNx-HMMT composite nanomaterial as electrocatalysts for methanol electrooxidation in direct methanol fuel cells (DMFCs).

scholarly journals Enhancement of Chloroprene/Natural/Butadiene Rubber Nanocomposite Properties Using Organoclays and Their Combination with Carbon Black as Fillers

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1085
Author(s):  
Patricia Castaño-Rivera ◽  
Isabel Calle-Holguín ◽  
Johanna Castaño ◽  
Gustavo Cabrera-Barjas ◽  
Karen Galvez-Garrido ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
High Performance ◽  
Rubber Matrix ◽  
Butadiene Rubber ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rubber Blends ◽  
Ft Ir ◽  
Chloroprene Rubber

Organoclay nanoparticles (Cloisite® C10A, Cloisite® C15) and their combination with carbon black (N330) were studied as fillers in chloroprene/natural/butadiene rubber blends to prepare nanocomposites. The effect of filler type and load on the physical mechanical properties of nanocomposites was determined and correlated with its structure, compatibility and cure properties using Fourier Transformed Infrared (FT-IR), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and rheometric analysis. Physical mechanical properties were improved by organoclays at 5–7 phr. Nanocomposites with organoclays exhibited a remarkable increase up to 46% in abrasion resistance. The improvement in properties was attributed to good organoclay dispersion in the rubber matrix and to the compatibility between them and the chloroprene rubber. Carbon black at a 40 phr load was not the optimal concentration to interact with organoclays. The present study confirmed that organoclays can be a reinforcing filler for high performance applications in rubber nanocomposites.

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