Oxidation of hydrogen at platinum-polypyrrole electrodes

TLDR: In this article, a model reaction for the oxidation of hydrogen at polypyrrole-modified electrodes is studied, where Pt particles can be included by two methods, viz. electrochemical depositin of platinum particles and incorporation of Pt particles during polymerization of pyrrole on glassy carbon disc.

About: This article is published in Electrochimica Acta.The article was published on 1986-12-01 and is currently open access. It has received 82 citations till now. The article focuses on the topics: Polypyrrole & Polyaniline.

Figures

Fig. 10. i-E curves for a Pt/PAN/GC electrode with a Pt loading of 102 pg cm- *. The dashed line indicates the result of a PAN/GC electrode under the same conditions.

Frequently asked questions

Q1. What contributions have the authors mentioned in the paper "Oxidation of hydrogen at platinum-polypyrrole electrodes" ?

• A submitted manuscript is the version of the article upon submission and before peer-review. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher 's website. The final author version and the galley proof are versions of the publication after peer review. The final published version features the final layout of the paper including the volume, issue and page numbers. 

Q2. What is the limiting current density for a bare Pt electrode?

Pt deposition current density: 0.4 mA cmmZ.electrode with a low Pt loading the amount of Pt particles on the outer surface is less and not enough to oxidize completely the amount of hydrogen transported to the electrode at high rotation rates. 

Q3. What is the limiting current density for a Pt/PP/GC electrode?

the diffusion of hydrogen from the outer surface of the polypyrrole film to the Pt particles inside the film affects the rate of hydrogen oxidation. 

Q4. Why is the limiting current density plotted against the Pt loading?

Because of the applied preparation method the Pt particles of a Pt/PP/GC electrode are clean, ie not covered by polypyrrole, so that the Pt surface is exposed to the solution. 

Q5. What is the i-E curve for a Pt/PP/GC electrode?

poly-methylpyrrole (PMP) and polyaniline (PAN) were used as the conducting polymer for the Pt/polymer/GC electrodes. 

Q6. What is the i-E curve for Pt/PMP/GC electrodes?

I-___&~ EvsRHE (mVIOxidation of hydrogen at platinum-polypyrrole electrodes 1575Hydrogen oxidation is a diffusion limited process for all the investigated Pt/polymer/GC electrodes at high potentials, oiz.