Bottom-up design of a stable CO-tolerant platinum electrocatalyst with enhanced fuel cell performance in direct methanol fuel cells

RSC Advances ◽  
2016 ◽  
Vol 6 (101) ◽  
pp. 98861-98866 ◽  
Author(s):  
Xinxin Yu ◽  
Fang Luo ◽  
Zehui Yang
Keyword(s):  
Fuel Cell ◽  
Carbon Black ◽  
Direct Methanol Fuel Cells ◽  
Vinyl Pyrrolidone ◽  
Bottom Up ◽  
Fuel Cell Performance ◽  
Platinum Electrocatalyst ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Poly Vinyl Pyrrolidone

Here, we design a stable CO tolerant platinum electrocatalyst via a bottom-up method, in which the platinum nanoparticles are deposited on carbon black after coating with polybenzimidazole (PBI) and poly(vinyl pyrrolidone) (PVP).

Performance Enhancement of Alkaline Direct Methanol Fuel Cells by Ni/Al Layered Double Hydroxides

2010 ◽  
Vol 7 (3) ◽  
Author(s):  
Jason C. Ganley ◽  
Nana K. Karikari ◽  
Dharmaraj Raghavan
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Direct Methanol Fuel Cells ◽  
Cell Mass ◽  
Cell Polarization ◽  
Pt Catalyst ◽  
Enhancement Effect ◽  
Fuel Cell Performance ◽  
Direct Methanol ◽  
Methanol Fuel Cells

This paper reports the results of fuel cell performance tests detailing the effects of Ni/Al layered double hydroxide (Ni-LDH) on the performance of alkaline direct methanol fuel cells (DMFCs). It is desirable to enhance the maximum rate of methanol consumption at a fuel cell’s anode so that expensive bimetallic catalysts (such as Pt-Ru) would not be as essential to remedy the well-known sluggish kinetics and Pt catalyst deactivation tendencies of DMFCs. The test cells were constructed using partially hydrolyzed polyvinyl alcohol film membranes impregnated with a 10 M potassium hydroxide electrolyte. The cells were tested at a constant temperature of 40°C, and the effect of the addition of Ni-LDH to the membrane surface was studied by comparison of fuel cell polarization and power production curves of cells with Pt or Pt-Ru anodes paired with Pt cathodes. The benefits of Ni-LDH addition to DMFCs are clearly shown vis-à-vis the extended operating current densities and associated increases in power density for each catalyst type. The enhancement effect of Ni-LDH appears largely as enhancement of cell mass transport. Cells constructed with Pt anodes and membrane surfaces modified by Ni-LDH perform very nearly as well as Ni-LDH-free cells using bimetallic Pt-Ru anodes.

scholarly journals Simultaneous enhancements in stability and CO tolerance of Pt electrocatalyst by double poly(vinyl pyrrolidone) coatings

RSC Advances ◽  
2017 ◽  
Vol 7 (47) ◽  
pp. 29839-29843 ◽  
Author(s):  
Jiuxiao Sun ◽  
Ying Ling ◽  
Quan Zhang ◽  
Xinxin Yu ◽  
Zehui Yang
Keyword(s):  
Fuel Cells ◽  
Direct Methanol Fuel Cells ◽  
Vinyl Pyrrolidone ◽  
Co Poisoning ◽  
Practical Application ◽  
Co Tolerance ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Poly Vinyl Pyrrolidone ◽  
Anodic Electrocatalyst

CO poisoning and low durability of the anodic electrocatalyst is one of the obstacles restricting the practical application of direct methanol fuel cells (DMFCs).

The Progress of Hybrid Proton Exchange Membranes Prepared by SPAEKs for Direct Methanol Fuel Cells

2012 ◽  
Vol 512-515 ◽  
pp. 1442-1445
Author(s):  
Hai Dan Lin ◽  
He Zhang ◽  
Xiao Ying Yang
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Direct Methanol Fuel Cells ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Layer By Layer ◽  
Aryl Ether ◽  
Fuel Cell Performance ◽  
Nanocomposite Layer ◽  
Direct Methanol

This review summarizes efforts in developing proton exchange membranes (PEMs) with excellent electrochemical fuel cell performance prepared by SPAEK in proton exchange membrane fuel cell (PEMFC) applications. Over the past few decades, much polyelectrolyte has been extensively studied to improve the properties as alternatives with lower cost and considerable performances for PEMFC. Sulfonated poly(aryl ether ketone) (SPAEK), fell into this category, which offers the attribute of adjustable proton conductivity, excellent mechanical and thermal stability. The discussion will cover crosslinking, organic-inorganic nanocomposite, layer-by-layer approaches.

Enhanced DMFC Performance via Electro-Hydraulic Pulsing

2004 ◽  
Author(s):  
Comas Haynes ◽  
Scott Leahy ◽  
Leonard Lay ◽  
Larry McCarthy ◽  
David Parekh
Keyword(s):  
Fuel Cell ◽  
Power Output ◽  
High Frequency ◽  
Liquid Fuel ◽  
Direct Methanol Fuel Cells ◽  
Methanol Crossover ◽  
Current Load ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Choice Option

Direct methanol fuel cells (DMFCs) are an attractive fuel cell choice option, particularly because of the capability to use liquid fuel without need for processing. The phenomenon of methanol crossover, however, substantially reduces cell power output and efficiency. The present work shows the benefits of periodically pulsed fuel supply and current load on the performance of a DMFC. It is determined that the enhanced performance resultant from such electro-hydraulic (EH) pulsing is realized due to temporary, cyclic mitigations of methanol crossover (as well as unstably high voltages given high frequency electronic pulsing).

Polysulfone-based Ionomers for Fuel Cell Applications

2009 ◽  
Vol 21 (5) ◽  
pp. 673-692 ◽  
Author(s):  
Cristina Iojoiu ◽  
Jean-Yves Sanchez
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Dimensional Stability ◽  
Proton Exchange Membrane ◽  
Direct Methanol Fuel Cells ◽  
Proton Exchange ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Exchange Membrane ◽  
The Impact

This paper is a review that is focused on ionomers based on aromatic polysulfone backbone and intended to be used in proton exchange membrane fuel cells or in direct methanol fuel cells. Emphasis is placed on the different chemical routes to prepare the ionomers. Special attention is given to the impact of the ionomer structure on the conductivity performance and on the dimensional stability of the membranes at high temperatures.

Facile preparation of mesoporous graphenes by the sacrificial template approach for direct methanol fuel cell application

2014 ◽  
Vol 2 (46) ◽  
pp. 19914-19919 ◽  
Author(s):  
Jianyu Cao ◽  
Hui Zhuang ◽  
Mengwei Guo ◽  
Hongning Wang ◽  
Juan Xu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Diffusion Layer ◽  
Direct Methanol Fuel Cell ◽  
Direct Methanol Fuel Cells ◽  
Fuel Cell Application ◽  
Direct Methanol ◽  
Facile Preparation ◽  
Methanol Fuel Cells ◽  
Methanol Fuel Cell

Mesoporous graphenes were synthesized via a template-assisted pyrolysis approach and used as a material for a porous diffusion layer in direct methanol fuel cells.

scholarly journals Nanoporous PdCo Catalyst for Microfuel Cells: Electrodeposition and Dealloying

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
Satoshi Tominaka ◽  
Tetsuya Osaka
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Direct Methanol Fuel Cells ◽  
Reduction Reaction ◽  
The Novel ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
On Chip ◽  
Microfuel Cells ◽  
Novel Design

PdCo alloy is a promising catalyst for oxygen reduction reaction of direct methanol fuel cells because of its high activity and the tolerance to methanol. We have applied this catalyst in order to realize on-chip fuel cell which is a membraneless design. The novel design made the fuel cells to be flexible and integratable with other microdevices. Here, we summarize our recent research on the synthesis of nanostructured PdCo catalyst by electrochemical methods, which enable us to deposit the alloy onto microelectrodes of the on-chip fuel cells. First, the electrodeposition of PdCo is discussed in detail, and then, dealloying for introducing nanopores into the electrodeposits is described. Finally, electrochemical response and activities are fully discussed.

A Ti-coated nano-SiC supported platinum electrocatalyst for improved activity and durability in direct methanol fuel cells

2014 ◽  
Vol 2 (26) ◽  
pp. 10146 ◽  
Author(s):  
Yan Zhang ◽  
Jianbing Zang ◽  
Liang Dong ◽  
Xiaozhe Cheng ◽  
Yuling Zhao ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Direct Methanol Fuel Cells ◽  
Supported Platinum ◽  
Platinum Electrocatalyst ◽  
Direct Methanol ◽  
Methanol Fuel Cells
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