scholarly journals Pt-on-Pd bimetallic nanodendrites stereoassembled on MXene nanosheets as high-efficiency electrocatalysts toward methanol oxidation reaction

2021 ◽  
Author(s):  
Cuizhen Yang ◽  
Quanguo Jiang ◽  
Huan Liu ◽  
Lu Yang ◽  
Haiyan He ◽  
...  
Keyword(s):  
Direct Methanol Fuel Cell ◽  
High Efficiency ◽  
Energy Conversion Efficiency ◽  
High Energy ◽  
Green Energy ◽  
Methanol Oxidation Reaction ◽  
Direct Methanol ◽  
High Energy Conversion Efficiency ◽  
Pollution Emissions ◽  
Methanol Fuel Cell

Direct methanol fuel cell (DMFC) has been considered as an ideal “green” energy converter because of its high energy-conversion efficiency and low pollution emissions, while the high costs and poor...

Conceptual Design of an Autonomous Underwater Vehicle Powered by a Direct Methanol Fuel Cell to Enlarge Endurance

2018 ◽  
Author(s):  
Antonio Villalba-Herreros ◽  
Teresa J. Leo ◽  
Ricardo Abad
Keyword(s):  
Fuel Cell ◽  
Conceptual Design ◽  
Direct Methanol Fuel Cell ◽  
Autonomous Underwater Vehicle ◽  
Autonomous Underwater Vehicles ◽  
High Energy ◽  
High Energy Density ◽  
Direct Methanol ◽  
Offshore Industry ◽  
Methanol Fuel Cell

Autonomous underwater vehicles (AUVs) are versatile machines capable of more and more complex missions including the offshore industry. The ability to carry out some missions relies on the endurance the vehicle is provided with. In this sense, fuel cells are found to be very adequate devices to enlarge AUVs endurance because of the high energy density and specific energy they can achieve, but the application of fuel cell technology to AUVs faces specific challenges that need to be overcome. The present work describes the conceptual design process of a typical AUV powered by a direct methanol fuel cell. Methanol is a high available fuel and its handling system is simple. The obtained results indicate that the manufacturing of such a vehicle is possible within several constrains, being the carbon dioxide treatment system the most critical component of the energy plant. The projected vehicle is compared to current vehicles on the market showing the improved endurance.

Evaluation of the Performance Characteristics of a Direct Methanol Fuel Cell With Multifuels

2010 ◽  
Vol 7 (4) ◽  
Author(s):  
Sujith Mohan ◽  
S. O. Bade Shrestha
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Direct Methanol Fuel Cells ◽  
Operating Temperature ◽  
High Energy ◽  
High Energy Density ◽  
Power Sources ◽  
Transport Losses ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Direct methanol fuel cells are one of the alternate power sources for the field of power electronics because of their high energy density. The benefits of a fuel cell toward the environment can be greatly improved if the fuel used for its application comes from renewable sources. In this study, the performance of a direct methanol fuel cell was investigated under five different methanol concentrations. The effect of methanol concentration on the cell operating temperature is studied. Impedance spectroscopy was conducted to measure the ohmic, activation, and mass transport losses for all concentrations. The cell performance was evaluated using methane and ethanol fuels and this was compared with methanol operation.

Evaluation of the Performance Characteristics of a Direct Methanol Fuel Cell With Multi Fuels

2009 ◽  
Author(s):  
Sujith Mohan ◽  
S. O. Bade Shrestha
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Direct Methanol Fuel Cells ◽  
Operating Temperature ◽  
High Energy ◽  
High Energy Density ◽  
Power Sources ◽  
Transport Losses ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Direct methanol fuel cells are one of the alternate power sources for the field of power electronics because of their high energy density. The benefits of a fuel cell towards the environment can be greatly improved if the fuel used for its application comes from renewable sources. In this study, the performance of a direct methanol fuel cell was investigated under five different methanol concentrations. The effect of methanol concentration on the cell operating temperature is studied. Impedance spectroscopy was conducted to measure the ohmic, activation and mass transport losses for all concentrations. The cell performance was evaluated using methane and ethanol fuels and this was compared with methanol operation.

Synthesis of NiCr Nano Oxides as Anode Electrocatalysts for Direct Methanol Fuel Cell

2011 ◽  
Vol 295-297 ◽  
pp. 2066-2070
Author(s):  
Chen Hong Ren ◽  
Ying Ying Gu ◽  
Zhi Wei Guo ◽  
Kai Feng
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Methanol Oxidation Reaction ◽  
Impregnation Method ◽  
Molar Ratios ◽  
Calcination Temperatures ◽  
Oxidation Of Methanol ◽  
Direct Methanol ◽  
Anode Electrocatalysts ◽  
Methanol Fuel Cell

NiCr nano oxides have been synthesized by impregnation method and were used as the anode electrocatalysts for direct methanol fuel cell(DMFC). The catalysts were characterized by X-ray diffraction(XRD) and scanning electron microscopy(SEM). The activity of catalysts with different metal molar ratios and calcination temperatures on the methanol oxidation reaction were investigated by cyclic voltammetry(CV) and bulk electrolysis with coulometry. The results show that the NiCr nano oxides calcined at 500°C for 6h gave an excellent electrocatalytic performance in the anodic oxidation of methanol.

Analysis of Redox Reactions on Pt-Sn based Nano-catalysts for Direct Methanol Fuel Cell Applications

2018 ◽  
Vol 21 (1) ◽  
pp. 021-028 ◽  
Author(s):  
A. Sandoval-González ◽  
S. A. Gamboa
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction Reaction ◽  
Electric Power ◽  
Oxygen Reduction ◽  
Direct Methanol Fuel Cell ◽  
Oxidation Reaction ◽  
Reduction Reaction ◽  
Methanol Oxidation Reaction ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Low content Pt based catalysts (Pt-Mx, Mx: SnO2, Sn) were prepared by microwave assisted-thermal synthesis. Pt-SnO2/C catalyst showed good performance for methanol oxidation reaction. Besides, Pt1Sn1/C showed good performance for catalyzing the oxygen reduction reaction. The catalysts were characterized structurally by X-ray diffraction and transmission electron microscopy techniques. It was possible to observe the presence of nanoparticles obtained by the synthesis method used in this work. The chemical composition of every material was determined by energy dispersive spectroscopy analysis. The electrochemical characterization of the electrocatalytic materials was carried out in acid medium by cyclic voltammetry and rotating disk electrode techniques. Pt-SnO2/C and Pt1Sn1/C were compared with commercial PtRu/C and Pt/C catalysts respectively. Pt-SnO2/C showed better electrochemical characteristics than commercial PtRu/C for performing the methanol oxidation reaction (MOR). Pt1Sn1/C showed an exchange current density two orders of magnitude higher than commercial Pt/C for performing the oxygen reduction reaction (ORR). The materials were evaluated in an experimental direct methanol fuel cell (DMFC) operating during 10 hours. The electric power density loss showed by the DMFC made with commercial catalysts (PtRu/C and Pt/C) was 67% while the DMFC made with Pt-SnO2/C and Pt1Sn1/C showed an electric power loss ca. 16%. It means that the catalysts synthesized in this work can be considered as good candidates for experimental direct methanol fuel cells.

The function of hydrophobic cathodic backing layers for high energy passive direct methanol fuel cell

2011 ◽  
Vol 196 (22) ◽  
pp. 9510-9515 ◽  
Author(s):  
Jing Zhang ◽  
Ligang Feng ◽  
Weiwei Cai ◽  
Changpeng Liu ◽  
Wei Xing
Keyword(s):  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
High Energy ◽  
Direct Methanol ◽  
Methanol Fuel Cell

scholarly journals Analysis on Geometry of Fluid Flow Manifold in Direct Methanol Fuel Cell

2020 ◽  
Vol 5 (8) ◽  
pp. 822-827
Author(s):  
Govindarasu Ramasamy ◽  
R. Kavitha ◽  
M. Nambiraj ◽  
R. Praveen Kumaar ◽  
N. N. Harish Kumar
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Direct Methanol Fuel Cell ◽  
Flow Distribution ◽  
High Energy ◽  
High Energy Density ◽  
No Production ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Fuel cells are the devices that convert chemical energy into electrical energy through an electrochemical reaction. Direct Methanol Fuel cell (DMFC) is a proton exchange membrane fuel cells in which methanol is used as fuel. Its high energy density makes it suitable for fuel cells. Even though carbon dioxide is produced, there is no production of sulfur or nitrogen oxides. The problems usually occurred while working with DMFC are methanol crossover, condensation of methanol, water management and carbon dioxide release. In that the uneven flow distribution, accumulation of carbon dioxide bubbles in the fuel cell are the major issues in DMFC. To prevent these issues, this work focuses on the theoretical and experimental studies on development of fuel cells with special importance to geometry of the manifold. This paper provides the optimal solution for preventing uneven flow distribution that is the usage of squoval shaped manifold which is the combination of both square and circle. Performance of DMFC with squoval shape manifold is evaluated experimentally and is compared with square shape manifold and rectangle shape manifold geometry design.

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