Methanol electrooxidation on synthesized PtRu nanocatalyst supported on acetylene black in half cell and in direct methanol fuel cell

Zhiani, Mohammad; Jalili, Jalal; Rezaei, Behzad; Taghiabadi, Mohammad Mohammadi

doi:10.1016/j.ijhydene.2012.12.088

Cited by 14 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the fitting of the EIS spectrum, R ct,A (8.9 Ω cm 2 ) resulted to be three times higher than R ct,C (2.9 Ω cm 2 ), confirming that the methanol electrooxidation is a sluggish reaction, even slower than oxygen reduction reaction. However, the estimated charge transfer resistance related to MOR is lower than most of R ct,A reported in literature, although the latter are often estimated ex‐situ, using a three‐electrode configuration in aqueous methanol solution 47‐50 …”

Section: Resultsmentioning

confidence: 80%

See 1 more Smart Citation

Methanol and proton transport through chitosan‐phosphotungstic acid membranes for direct methanol fuel cell

et al. 2020

View full text Add to dashboard Cite

Composite chitosan-phosphotungstic acid membranes were synthesized by ionotropic gelation. Their liquid uptake is higher for thin membranes (23 ± 2 μm), while it is lower ($70%) for thicker membranes (50-70 μm). Polarization curves recorded using single module fuel cell at 70 C allowed to estimate a peak power density of 60 mW cm −2 by using 1 M as methanol and low Pt and Pt/Ru loadings (0.5 and 3 mg cm −2) at the cathode and at the anode, respectively. Electrochemical impedance spectroscopy was used to estimate the membrane conductivity and to model the electrochemical behavior of methanol electrooxidation inside the fuel cell revealing a two-step mechanism mainly responsible of overall kinetic losses. Transport of methanol inside the membrane was studied by potentiostatic measurements, allowing to estimate a methanol diffusivity of 3.6 × 10 −6 cm 2 s −1 .

show abstract

Section: Resultsmentioning

confidence: 80%

“…However, the estimated charge transfer resistance related to MOR is lower than most of R ct,A reported in literature, although the latter are often estimated ex-situ, using a three-electrode configuration in aqueous methanol solution. [47][48][49][50]…”

Section: Fuel Cell Performancesmentioning

confidence: 99%

Methanol and proton transport through chitosan‐phosphotungstic acid membranes for direct methanol fuel cell

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The Pt 3 -SnO x /C catalyst shows the highest values of about 16.6 mA/cm 2 (peak I) and 15.3 mA/cm 2 (peak II), respectively, which are much larger than the Pt/C catalysts 38 and close to the Pt-Ru/C catalysts. 39,40 This indicates that the Pt-SnO x /C catalyst is a potential substitute for the Pt-Ru/C catalysts. These variations can be explained by the dual effects of Sn atoms mentioned above.…”

Section: Resultsmentioning

confidence: 98%

Electrochemical Oxidation of Methanol on Pt-SnO_x/C Catalysts Characterized by Electrochemistry Methods

Sun

Gao

Pang

et al. 2015

J. Electrochem. Soc.

View full text Add to dashboard Cite

Pt-SnOx/C catalysts with Pt/Sn atomic ratio of 1:1, 2:1, 3:1, 4:1 and 5:1 were prepared by the impregnation method. The electrochemical process of methanol oxidation on these five catalysts was studied using cyclic voltammetry and electrochemical impedance spectroscopy two simple real-time methods. Impregnation is a stable way to prepare Pt-SnOx/C catalysts with accurate stoichiometry and uniform particle size, which increased from 3.8 nm to 5.4 nm as the Sn content decreased. The maximum current density of methanol electrochemical oxidation initially increased and then decreased with the Sn content, and Pt3-SnOx/C exhibited the highest value of about 16.6 mA·cm−2. Methanol electrochemical oxidation on the Pt-SnOx/C catalyst surface changed from adsorption to dehydrogenation, to hydrolysis and finally oxidation as the electrode potential increased from 0 V to 0.85 V. The main intermediate created during methanol electrochemical oxidation was COads. The existence of Sn atoms decreased the onset potential of the hydrolysis reaction, and consequently promoted methanol electrochemical oxidation. Interestingly enough, the highest reaction rate was obtained at about 0.65 V due to similar reaction rates of COads oxidation and methanol dehydrogenation.

show abstract

“…Therefore, acetylene black is employed as a conductive additive to transfer electrons during the reaction process. 48,49 Next, 2 μL of this suspension was spread on a polished glassy carbon electrode (GC) with a geometric area of 0.071 cm 2 . The surface of the GC electrode was polished using a 2 μm diamond paste, washed with water using an ultrasonic bath, and rinsed sequentially with acetone and ethanol.…”

Section: Methodsmentioning

confidence: 99%

Promotion Effects of ZrO₂on Mesoporous Pd Prepared by a One-Step Dealloying Method for Methanol Oxidation in an Alkaline Electrolyte

Song

Duan

Shi

et al. 2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

Composition-controllable three-dimensional mesoporous Pd-ZrO 2 composites were synthesized through simple one-step dealloying of melt-spun Al-Pd-Zr ribbons. The Zr atoms in the precursor alloy transformed into ZrO 2 nanoparticles with a size of approximately 3 nm after dealloying, and they embedded in the surface of the Pd ligaments. The composites exhibited remarkable catalytic activity and stability for methanol oxidation in an alkaline electrolyte due to the synergistic effect and electronic interaction between Pd and ZrO 2 . Among the composites, the Pd-ZrO 2 sample dealloyed from the Al 85 Pd 13 Zr 2 precursor alloy had the highest peak current density, which was approximately 3.6 times that of the mesoporous Pd sample.

show abstract

Methanol electrooxidation on synthesized PtRu nanocatalyst supported on acetylene black in half cell and in direct methanol fuel cell

Cited by 14 publications

References 24 publications

Methanol and proton transport through chitosan‐phosphotungstic acid membranes for direct methanol fuel cell

Methanol and proton transport through chitosan‐phosphotungstic acid membranes for direct methanol fuel cell

Electrochemical Oxidation of Methanol on Pt-SnO_x/C Catalysts Characterized by Electrochemistry Methods

Promotion Effects of ZrO₂on Mesoporous Pd Prepared by a One-Step Dealloying Method for Methanol Oxidation in an Alkaline Electrolyte

Contact Info

Product

Resources

About

Methanol electrooxidation on synthesized PtRu nanocatalyst supported on acetylene black in half cell and in direct methanol fuel cell

Cited by 14 publications

References 24 publications

Methanol and proton transport through chitosan‐phosphotungstic acid membranes for direct methanol fuel cell

Methanol and proton transport through chitosan‐phosphotungstic acid membranes for direct methanol fuel cell

Electrochemical Oxidation of Methanol on Pt-SnOx/C Catalysts Characterized by Electrochemistry Methods

Promotion Effects of ZrO2on Mesoporous Pd Prepared by a One-Step Dealloying Method for Methanol Oxidation in an Alkaline Electrolyte

Contact Info

Product

Resources

About

Electrochemical Oxidation of Methanol on Pt-SnO_x/C Catalysts Characterized by Electrochemistry Methods

Promotion Effects of ZrO₂on Mesoporous Pd Prepared by a One-Step Dealloying Method for Methanol Oxidation in an Alkaline Electrolyte