Biotemplated synthesis of bark-structured TiC nanowires as Pt catalyst supports with enhanced electrocatalytic activity and durability for methanol oxidation

2014 ◽  
Vol 2 (21) ◽  
pp. 8003-8008 ◽  
Author(s):  
Zhen Qiu ◽  
Hui Huang ◽  
Jun Du ◽  
Xinyong Tao ◽  
Yang Xia ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Methanol Oxidation ◽  
Electrocatalytic Activity ◽  
Electrochemical Stability ◽  
Pt Catalyst ◽  
Catalyst Supports ◽  
High Electrical Conductivity ◽  
One Dimensional ◽  
Electrocatalytic Properties ◽  
Excellent Chemical

Unique one-dimensional bark-structured TiC NWs possessing high electrical conductivity, excellent chemical/electrochemical stability and enhanced electrocatalytic properties were synthesised.

Ruthenium and ruthenium oxide nanofiber supports for enhanced activity of platinum electrocatalysts in the methanol oxidation reaction

2016 ◽  
Vol 18 (22) ◽  
pp. 14859-14866 ◽  
Author(s):  
Geon-Hyoung An ◽  
Eun-Hwan Lee ◽  
Hyo-Jin Ahn
Keyword(s):  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Ruthenium Oxide ◽  
Electrochemical Activity ◽  
Pt Catalyst ◽  
Catalyst Supports ◽  
Methanol Oxidation Reaction ◽  
Enhanced Activity

Ru and RuO2 nanofiber composites arranged into nanosized grains as Pt catalyst supports are synthesized by electrospinning and post-calcination, which show excellent electrochemical activity.

scholarly journals Functionalized Carbon Nanotubes as Pt Catalyst Supports in Methanol Oxidation

2012 ◽  
Vol 33 (2-3) ◽  
pp. 290-297 ◽  
Author(s):  
Shibin YIN ◽  
Qiangqiang ZHU ◽  
Yinghuai QIANG ◽  
Lin LUO
Keyword(s):  
Carbon Nanotubes ◽  
Methanol Oxidation ◽  
Pt Catalyst ◽  
Catalyst Supports ◽  
Functionalized Carbon Nanotubes

Carboxylic Graphene-Supported Platinum and Platinum-Palladium Nanoparticles with High Electrocatalytic Activity for Methanol Oxidation

2013 ◽  
Vol 320 ◽  
pp. 670-674 ◽  
Author(s):  
Qing Zhou ◽  
Guang Can Wang ◽  
Long Yang ◽  
Yun Yang ◽  
Yang Xu
Keyword(s):  
Methanol Oxidation ◽  
Electrocatalytic Activity ◽  
Palladium Nanoparticles ◽  
Direct Methanol Fuel Cells ◽  
Pd Nanoparticles ◽  
Catalyst Supports ◽  
Peak Current Density ◽  
Supported Platinum ◽  
Direct Methanol ◽  
Methanol Fuel Cells

Pt, Pd and Pt-Pd nanoparticles (NPs) were synthesized on carboxylic graphene (CGR) sheets. The nanocomposites were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR) and UVvis absorption spectroscopy. Their electrocatalytic activity for methanol oxidation was also investigated. The results showed the peak current density of methanol oxidation of Pt NPs-Graphite oxide (GO), Pd NPs-CGR, Pt NPs-CGR and Pt-Pd NPs-CGR is 12.2μA/cm2, 14.1μA/cm2, 15.1μA/cm2and 21.5μA/cm2respectively. The nanocomposite of CGR as catalyst supports and Pt-Pd NPs as catalyzers is promising for direct methanol fuel cells.

Extended-Hückel Energy Band Structures of Organometallic Compounds with One-Dimensional Crystal Geometries

1990 ◽  
Vol 45 (2) ◽  
pp. 148-156 ◽  
Author(s):  
Wolfhard Koch
Keyword(s):  
Electrical Conductivity ◽  
Energy Band ◽  
Organometallic Compounds ◽  
High Electrical Conductivity ◽  
Energy Bands ◽  
Orbital Contribution ◽  
One Dimensional ◽  
Extended Hückel ◽  
Valence Bands ◽  
The One

AbstractIn order to rationalize the high electrical conductivity of 2,5-dimethyl-N,N'-dicyanoquinonediimine radical anion salts (2,5-DM-DCNQI) of copper, silver, and lithium, we performed onedimensional energy band structure calculations of extended-Hückel type (namely Self-Consistence of Charge, SCC) for one-dimensional models of these "organic conductors". In each case, SCC yields two overlapping incompletely occupied valence bands, which give rise to some evidence for the observed high electrical conductivity, in spite of the one-electron nature of the method. Furthermore, these two frontier energy bands do not contain any metallic orbital contribution, which suggests that the electron transport takes place in the organic stack of the 2,5-DM-DCNQI ligands only.

Preparation of Functionalized Graphene Multilayer Composite Films Supported Pt Catalyst and its Electro-Oxidation for Methanol

2020 ◽  
Vol 999 ◽  
pp. 91-99
Author(s):  
Ming Hong Luo ◽  
Yin Ai ◽  
Ke Jian Xia
Keyword(s):  
Methanol Oxidation ◽  
Current Density ◽  
Photoelectron Spectroscopy ◽  
Electrocatalytic Activity ◽  
Composite Films ◽  
Pt Catalyst ◽  
Layer By Layer ◽  
Multilayer Composite ◽  
Functionalized Graphene ◽  
Assembly Method

The multilayer composite films consisting of poly (diallyldimethylammonium chloride) functionalized graphene (PDDA-rGO) and phosphomolybdic acid functionalized graphene (PMo12-rGO) were prepared by layer-by-layer self-assembly method. The {PDDA-rGO/PMo12-rGO}n multilayer composite films were used as a support for electro-deposition of Pt particles in situ. Cyclic voltammetry (CV), X-ray photoelectron spectroscopy and scanning electron microscopy were employed for examining the composition, structure, and morphology of the catalyst. Results revealed that the Pt/{PDDA-rGO/PMo12-rGO}n catalyst is successfully prepared and that the multilayer composite films support improves the dispersion of the Pt particles. CV and chronoamperometry were employed to evaluate the electrocatalytic performance for methanol oxidation. Results revealed that the electrocatalytic activity and stability of the Pt/{PDDA-rGO/PMo12-rGO}3 catalyst for methanol oxidation are considerably improved in comparison with that of the Pt/GCE catalyst. The current density for the oxidation of methanol increased from 0.66 mA/cm2 to 1.21 mA/cm2. In addition, the ratio of the forward current density to the backward current density (If/Ib) was 1.92 for Pt/{PDDA-rGO/PMo12-rGO}3 catalyst, corresponding to 1.3 times that of the Pt/GCE catalyst. This result indicated that the multilayer composite films remarkably enhanced the electrocatalytic activity regarding methanol oxidation.

Preparation of a carbon supported Pt catalyst using an improved organic sol method and its electrocatalytic activity for methanol oxidation

2006 ◽  
Vol 162 (1) ◽  
pp. 124-131 ◽  
Author(s):  
Yawen Tang ◽  
Lingling Zhang ◽  
Yanen Wang ◽  
Yiming Zhou ◽  
Ying Gao ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Electrocatalytic Activity ◽  
Pt Catalyst ◽  
Supported Pt Catalyst

scholarly journals Effect of Sb-Doped SnO2 Nanostructures on Electrocatalytic Performance of a Pt Catalyst for Methanol Oxidation Reaction

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 866
Author(s):  
Seul-Gi Lee ◽  
Sang-Beom Han ◽  
Woo-Jun Lee ◽  
Kyung-Won Park
Keyword(s):  
Electrical Conductivity ◽  
Specific Surface ◽  
Surface Area ◽  
Methanol Oxidation ◽  
Specific Surface Area ◽  
Oxidation Reaction ◽  
Direct Methanol Fuel Cells ◽  
Pt Catalyst ◽  
Methanol Oxidation Reaction ◽  
Sno2 Nanostructures

In this study, antimony-doped tin oxide (ATO) support materials for a Pt anode catalyst in direct methanol fuel cells were prepared and electrochemically evaluated. When the heating temperature was increased from 300 to 400 °C, the ATO samples exhibited a slightly decreased specific surface area and increased electrical conductivity. In particular, the ATO sample heated at 350 °C in an air atmosphere showed improved electrical conductivity (1.3 S cm−1) with an optimum specific surface area of ~34 m2 g−1. The supported Pt catalysts were synthesized using a polyol process with as-prepared and heated ATO samples and Vulcan XC-72R as supports (denoted as Pt/ATO, Pt/ATO-350, and Pt/C, respectively). In the methanol oxidation reaction (MOR), compared to Pt/C and Pt/ATO, Pt/ATO-350 exhibited the best electrocatalytic activity and stability for MOR, which could be attributed to Pt nanoparticles on the relatively stable oxide support with high electrical conductivity and interaction between the Pt catalyst and the heated ATO support.

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