Evaluation of the Nafion effect on the activity of Pt–Ru electrocatalysts for the electro-oxidation of methanol

Chu, Young Kwang; Shul, Yong Gun; Choi, Won‐Mook; Woo, Seong Ihl; Han, Hye Sung

doi:10.1016/s0378-7753(03)00082-x

Cited by 60 publications

(32 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…351 The effects of physically mixing different compositions of Pt-Ru catalysts with various proportions of Nafion (a sulfonated tetrafluoroethylene based fluoropolymer with high protonic conductivity), through a multi-tiered screen were investigated. 376 The best catalysts, as identified by cyclic voltammetry and impedance spectroscopy were evaluated in a DMFC application. It was found that a Pt:Ru ratio of 1:1 mixed with 36.4 wt.…”

Section: Catalysts For Fuel Cell Anodesmentioning

confidence: 99%

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Green

Takeuchi

Hattrick‐Simpers

2013

Journal of Applied Physics

223

189

View full text Add to dashboard Cite

High throughput (combinatorial) materials science methodology is a relatively new research paradigm that offers the promise of rapid and efficient materials screening, optimization, and discovery. The paradigm started in the pharmaceutical industry but was rapidly adopted to accelerate materials research in a wide variety of areas. High throughput experiments are characterized by synthesis of a "library" sample that contains the materials variation of interest (typically composition), and rapid and localized measurement schemes that result in massive data sets. Because the data are collected at the same time on the same "library" sample, they can be highly uniform with respect to fixed processing parameters. This article critically reviews the literature pertaining to applications of combinatorial materials science for electronic, magnetic, optical, and energy-related materials. It is expected that high throughput methodologies will facilitate commercialization of novel materials for these critically important applications. Despite the overwhelming evidence presented in this paper that high throughput studies can effectively inform commercial practice, in our perception, it remains an underutilized research and development tool. Part of this perception may be due to the inaccessibility of proprietary industrial research and development practices, but clearly the initial cost and availability of high throughput laboratory equipment plays a role. Combinatorial materials science has traditionally been focused on materials discovery, screening, and optimization to combat the extremely high cost and long development times for new materials and their introduction into commerce. Going forward, combinatorial materials science will also be driven by other needs such as materials substitution and experimental verification of materials properties predicted by modeling and simulation, which have recently received much attention with the advent of the Materials Genome Initiative. Thus, the challenge for combinatorial methodology will be the effective coupling of synthesis, characterization and theory, and the ability to rapidly manage large amounts of data in a variety of formats. V C 2013 AIP Publishing LLC. [http://dx

show abstract

Section: Catalysts For Fuel Cell Anodesmentioning

confidence: 99%

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Green

Takeuchi

Hattrick‐Simpers

2013

Journal of Applied Physics

223

189

View full text Add to dashboard Cite

show abstract

“…To increase the contact surface area, impregnation of ionomer into the catalyst layer enables the electro-catalyst to integrate into the electrolyte for extending the three-dimensional reaction zone. Extensive and intensive research on Nafion content was conducted in previous works [3][4][5]. The Nafion phase mainly influences the electrical conductivity, including ionic and electronic conductivity.…”

Section: Introductionmentioning

confidence: 99%

Determination of ionic resistance and optimal composition in the anodic catalyst layers of DMFC using AC impedance

Zhao

Fan

Wang

et al. 2005

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

“…The Pt content in the reaction layer of both cathode and anode was maintained at about 3 mg/cm 2 , and carbon content in non-catalytic carbon electrode was adjusted to 1.2 mg/cm 2 to make the similar electrode thickness with Pt and Pt-Ru containing electrode. MEA was obtained by pressing the anode and cathode on either side of a pretreated Nafion 117 membrane under 1 atm pressure at 125°C for 4 min [10,11]. We assume that the detected apparent crossover rate of alcohols by GC was affected by five factors (physical blocking effect of anode, alcohol oxidation effect of anode electrocatalysts, physical blocking effect of membrane, physical blocking effect of cathode, and alcohol oxidation effect of cathode) as shown in Figure 1.…”

Section: Mea Fabricationmentioning

confidence: 99%

Alcohol Crossover Behavior in Direct Alcohol Fuel Cells (DAFCs) System

Chu¹,

Shul²

2012

Fuel Cells

View full text Add to dashboard Cite

The alcohols (methanol, ethanol, and 1‐propanol) crossover behavior of through fuel cell membrane electrode assembly (MEA) in direct alcohol fuel cell (DAFC) system was studied. We divided five different factors which affect alcohol crossover behavior through MEA to analyze alcohol crossover behavior. Those are membrane effect, physical blocking effect of anode, alcohol oxidation effect of anode electrocatalysts, physical blocking effect of cathode, and alcohol oxidation effect of cathode. Among these five factors, the four factors caused by two different electrodes (anode and cathode) were evaluated by fabricating various types of MEA. In the case of alcohols through membrane without any electrode was increased when the cell temperature was raised from room temperature to 100 °C, but it was decreased above the cell temperature of 100 °C. Among the electrode effects on alcohol crossover rate, physical blocking effect of electrodes played dominant role below 100 °C. However alcohol oxidation effects of electrodes was predominant above the 100 °C.

show abstract

Evaluation of the Nafion effect on the activity of Pt–Ru electrocatalysts for the electro-oxidation of methanol

Cited by 60 publications

References 26 publications

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Applications of high throughput (combinatorial) methodologies to electronic, magnetic, optical, and energy-related materials

Determination of ionic resistance and optimal composition in the anodic catalyst layers of DMFC using AC impedance

Alcohol Crossover Behavior in Direct Alcohol Fuel Cells (DAFCs) System

Contact Info

Product

Resources

About