Highly active carbon supported palladium-rhodium PdXRh/C catalysts for methanol electrooxidation in alkaline media and their performance in anion exchange direct methanol fuel cells (AEM-DMFCs)

Jurzinsky, Tilman; Bär, Robin M.; Cremers, Carsten; Tübke, Jens; Elsner, Peter

doi:10.1016/j.electacta.2015.07.176

Cited by 70 publications

(39 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…At present, DAFCs are to be improved in several areas for better performance, such as catalysts at the electrodes (Cheng et al, 2015;Jurzinsky et al, 2015;Li et al, 2015), design of flow field (Wu et al, 2016), and proton-exchange membrane (Sha Wang et al, 2015). Nafion is a good candidate for the proton exchange membrane in DAFC because it has a lot of superior properties such as high ionic conductivity (Yoonoo et al, 2011), as well as high thermal and chemical stabilities.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Application of response surface methodology to optimize direct alcohol fuel cell power density for greener energy production

Charoen

Prapainainar

Sureeyatanapas

et al. 2017

Journal of Cleaner Production

View full text Add to dashboard Cite

Please cite this article as: Charoen K, Prapainainar C, Sureeyatanapas P, Suwannaphisit T, Wongamornpitak K, Kongkachuichay P, Holmes SM, Prapainainar P, Application of response surface methodology to optimize direct alcohol fuel cell power density for greener energy production, Journal of Cleaner Production (2016Production ( ), doi: 10.1016Production ( /j.jclepro.2016 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractEnergy production from direct alcohol fuel cells depends strongly on the operating conditions. In this research, the aim was to find the best conditions of direct methanol fuel cells (DMFC) and direct ethanol fuel cells (DEFC) to obtain the maximum power density with the response surface method using Program Design Expert 7.0.0. M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPTThree related independent variables, including operating temperature in the range of 30-70°C, alcohol flow rate in the range of 5-50 ml/min, and alcohol concentration in the range of 0.5-3 M, were covered. Nafion117 was used as an electrolyte and Pt-Ru and Pt were used as catalysts in anode and cathode, respectively. The effect of those variables on the maximum power density was illustrated in the form of quadratic models which predicted the appropriate operating conditions. The Nafion membrane was modified by adding mordenite (MOR) to improve its alcohol permeability. The result from response revealed that the higher operating temperatures and higher alcohol concentrations led to an increase in maximum power density, in both the DMFC and DEFC. The DMFC had a higher maximum power density and greater current than the DEFC had. This was because methanol was easier to oxidize than ethanol In addition, it was found that the MOR content of 1.47 wt% in the Nafion composite membrane reduced the alcohol permeability

show abstract

Section: Accepted Manuscriptmentioning

confidence: 99%

Application of response surface methodology to optimize direct alcohol fuel cell power density for greener energy production

Charoen

Prapainainar

Sureeyatanapas

et al. 2017

Journal of Cleaner Production

View full text Add to dashboard Cite

show abstract

“…This has been proven in a number of studies on the alcohol oxidation in alkaline environment. [11][12][13][14] In order to be able to quantify the carbon loss the detection of CO 2 in the mass spectrometer was calibrated using CO stripping reaction:…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

DEMS and Online Mass Spectrometry Studies of the Carbon Support Corrosion under Various Polymer Electrolyte Membrane Fuel Cell Operating Conditions

Cremers

Jurzinsky

Meier

et al. 2018

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Differential electrochemical mass spectrometry as well as online mass spectrometry in combination with singe cell testing has been used to study carbon corrosion of typical carbon materials discussed as support for electro-catalyst in fuel cells, e.g. carbon blacks or carbon nanotubes. Beside standard tests used to study the stability under automotive LT-PEMFC conditions, additional tests were performed to try to test the stability under the operating conditions of high temperature polymer electrolyte membrane fuel cells (HT-PEMFC). It was shown that under LT-PEMFC conditions a strong catalytic effect of platinum on the carbon corrosion rate is observable. High temperatures in HT-PEMFC do accelerate the corrosion rate. It was further found that corrosion does not only occur at high potentials but also to a minor amount at lower potentials. This low potential corrosion is in particular observed after a prior potential excursion of the electrode indicating that such excursions do not only lead to the direct corrosion of the support but also to the formation of unstable surface groups, which can be removed subsequently. Throughout all tests, CNT exhibited a higher stability than the tested carbon blacks. In single cell testing, the contribution of other carbon materials in particular the MPL was evaluated. It was found that it is present but small compared to the catalyst support itself. In order to reduce the expenditure of platinum group metals in polymer electrolyte membrane fuel cells the dispersion of the catalyst on a conductive support is the current state-of the art. Only few examples do not follow this approach. Most prominent among the exemptions is the Nano-Structured Thin Film (NSTF) type of catalyst developed by 3M.1 For most applications, carbon has become, however, a sort of standard support material. To accomplish the goal to reduce costs for the fuel cells, inexpensive carbon black materials like Vulcan XC72R from Cabot are used most often. However, as carbon in presence of water is thermodynamically unstable for potentials higher than 0.207 V 2 carbon corrosion can become an issue if the oxidation of the carbon is not strongly kinetically hindered e.g. via high degrees of graphitization. Consequently, carbon materials exhibiting such high degrees of graphitization like carbon nanotubes or graphene have attracted attention as alternative supports.The focus of the research on carbon corrosion is on LT-PEMFC for automotive application. With respect to carbon corrosion the reversed current decay mechanism proposed by Reiser et al.3 is an accepted cause for this type of degradation processes. This is confirmed e.g. in the review of PEMFC degradation processes published by Yu et al. 4 The process which is induced by the formation of a hydrogen oxygen front on the anode side upon hydrogen admission after longer standstill can cause potential excursions of the cathode side to potentials between 1.4 and 1.75 V.5 Accordingly, the common tests suites published by US Department of Energy (DoE) and the Fuel Ce...

show abstract

“…in Ref. 38. For the measurements a rotating ringdisk electrode set-up was used consisting of an AFMSRCE rotator, a AFE6M shaft and a AFE6R2GCPT tip with a glassy carbon disk electrode (radius r 1 = 2.75 mm) and a Pt ring (inner radius r 2 = 3.25 mm, outer radius r 3 = 4.25 mm) (all PINE Instruments, USA).…”

Section: Methodsmentioning

confidence: 99%

Quantitative Kinetic Analysis of a PdAu₃Alloy Catalyst for Oxygen Electro-Reduction

Kurnatowski

Bortz

Klein

et al. 2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

The oxygen reduction reaction (ORR) mechanism for electrochemical production of hydrogen peroxide is investigated for an Au-Pd catalyst with 25 at% palladium. The sample was prepared by chemical reduction of a precursor solution on a carbon-based substrate. Rotating ring-disk electrode (RRDE) measurements were performed for electrochemical characterization exhibiting H 2 O 2 current efficiencies of about 75-78% at low disk potentials. The focus of this article is on the mathematical evaluation of the experimental data using the analytical method from Damjanovic et al. [J. Chem. Phys. 45, 4057 (1966)] and a powerful numerical data fitting technique based on RRDE simulations in MATLAB, which is capable of investigating reaction mechanisms with different structures. The latter method is presented in detail and the electro-kinetic parameters of the ORR mechanism at the considered catalyst resulting from both methods are compared quantitatively. It is found that the oxygen reductions via the 2-electron and the 4-electron pathways occur in parallel, whereas the hydrogen peroxide reduction pathway is found apparently inactive.

show abstract

Highly active carbon supported palladium-rhodium PdXRh/C catalysts for methanol electrooxidation in alkaline media and their performance in anion exchange direct methanol fuel cells (AEM-DMFCs)

Cited by 70 publications

References 51 publications

Application of response surface methodology to optimize direct alcohol fuel cell power density for greener energy production

Application of response surface methodology to optimize direct alcohol fuel cell power density for greener energy production

DEMS and Online Mass Spectrometry Studies of the Carbon Support Corrosion under Various Polymer Electrolyte Membrane Fuel Cell Operating Conditions

Quantitative Kinetic Analysis of a PdAu₃Alloy Catalyst for Oxygen Electro-Reduction

Contact Info

Product

Resources

About

Highly active carbon supported palladium-rhodium PdXRh/C catalysts for methanol electrooxidation in alkaline media and their performance in anion exchange direct methanol fuel cells (AEM-DMFCs)

Cited by 70 publications

References 51 publications

Application of response surface methodology to optimize direct alcohol fuel cell power density for greener energy production

Application of response surface methodology to optimize direct alcohol fuel cell power density for greener energy production

DEMS and Online Mass Spectrometry Studies of the Carbon Support Corrosion under Various Polymer Electrolyte Membrane Fuel Cell Operating Conditions

Quantitative Kinetic Analysis of a PdAu3Alloy Catalyst for Oxygen Electro-Reduction

Contact Info

Product

Resources

About

Quantitative Kinetic Analysis of a PdAu₃Alloy Catalyst for Oxygen Electro-Reduction