Journal ArticleDOI
Formic acid oxidation at platinized platinum electrodes: Part V. A further study of catalytic effect of preadsorbed sulfur
A.Q. Contractor,Hira Lal +1 more
TLDR
In this article, the authors investigated the effect of preadsorbed sulfur on the growth and stripping of the sulfur layer in the presence of adsorbed formic acid in the form of a sulfur layer from SO2 solutions.About:
This article is published in Journal of Electroanalytical Chemistry.The article was published on 1979-10-25. It has received 12 citations till now. The article focuses on the topics: Sulfur.read more
Citations
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Journal ArticleDOI
Deactivation of Pt/VC proton exchange membrane fuel cell cathodes by SO2, H2S and COS
TL;DR: In this article, the deactivation behavior of commercial Pt on Vulcan carbon (Pt/VC) membrane electrode assemblies (MEAs) is determined when exposed to 1.5ppm (dry) of SO 2, H 2 S, or COS in air for 3, 12, and 24h while held at a constant potential of 0.6
Journal ArticleDOI
Oxidation of formic acid at platinum microparticles dispersed in a polyaniline matrix: Influence of long-range order and metal-polymer interaction
M. Gholamian,A.Q. Contractor +1 more
TL;DR: In this paper, the effects of long-range order and deposition of platinum microparticles on the activity of polyaniline films synthesized at various temperatures have been investigated.
Journal ArticleDOI
Potential dependence of sulfur dioxide poisoning and oxidation at the cathode of proton exchange membrane fuel cells
TL;DR: In this article, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were employed to investigate changes in the cathode after the introduction of SO2, and the decay in performance of the proton exchange membrane fuel cell was ascribed to the increasing of the charge transfer resistance (Rct) caused by the loss of the electrochemical surface area (ECA).
Journal ArticleDOI
Operational Performance Recovery of SO2-Contaminated Proton Exchange Membrane Fuel Cells
Benjamin D. Gould,Guido Bender,Keith Bethune,S. Dorn,Olga A. Baturina,Richard Rocheleau,Karen E. Swider-Lyons +6 more
TL;DR: In this paper, the performance of proton exchange membrane fuel cells (PEMFCs) was examined after 3 h of exposure to 1 ppm SO 2 in air at 60°C and 48.3 kPa g (7 psi) and relative humidity of 100 | 50% (anode | cathode).
Journal ArticleDOI
The study of electrode processes of sulphur dioxide on platinized electrode by the radiochemical method
TL;DR: In this paper, the adsorption of sulphur dioxide and the electrode reactions of adsorbed molecules at a platinized platinum electrode were studied by potentiodynamic and radiometric techniques.
References
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Journal ArticleDOI
Origin of Activation Effects of Acetonitrile and Mercury in Electrocatalytic Oxidation of Formic Acid
TL;DR: In this article, it was shown that in the presence of catalyst poisons such as acetonitrile or mercury, the currents for formic acid oxidation, measured in the potential range +0.4 to + 0.8V E(H) at Pt can be substantially increased.
Journal ArticleDOI
Electrochemical oxidation of formic acid at noble metals: Catalytic effects of foreign metal monolayers
TL;DR: In this article, the catalytic effects of a submonolayer of lead on noble metals have been discussed and discussed in terms of a previously published model, and theoretical analysis of these effects is presented.
Journal ArticleDOI
Two forms of chemisorbed sulfur on platinum and related studies
A.Q. Contractor,Hira Lal +1 more
TL;DR: The effect of temperature on the potentiodynamic oxidation of adsorbed sulfur layers on platinum, obtained from H 2 S or SO 2 was studied in this paper, where two distinct peaks were observed at 80°C, oxidation peak I (at 0.97 V) corresponding to the weakly bound sulfur and oxidation peak II (at 1.10 V) representing the strongly bound sulfur.
Journal ArticleDOI
Adsorption and oxidation of organic compounds on a platinum electrode partly covered by adsorbed sulphur
TL;DR: In this paper, the dependence of the non-stationary currents of formic acid, formaldehyde and methanol on the degree of coverage of the platinum electrode by adsorbed sulphur and the effect of adaption of sulphur on the electrooxidation of methenol and formaldehyde have been studied.
Journal ArticleDOI
The nature of species adsorbed on platinum from SO2 solutions
A.Q. Contractor,Hira Lal +1 more
TL;DR: In this paper, it was shown that at θS 0.9, the formation of a partial bilayer on top of the first layer can be explained by the presence of two forms of "difficultly reducible" oxygen.