𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Chemisorption of oxygen on carbon produced by electrochemical reduction of poly(tetrafluoroethylene)

✍ Scribed by Ladislav Kavan; František P. Dousek; Ludmila Kubelková

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
677 KB
Volume
24
Category
Article
ISSN
0008-6223

No coin nor oath required. For personal study only.

✦ Synopsis

The electrochemical reduction of poly(tetraffuoroethylene) with iith~um amalgam and washing the product with water yields a very reactive and pure carbonaceous substance which is capable of the chemisorption of oxygen from the gas phase or from aqueous solurion at room temperature. The product was studied by infrared spectroscopy and electron pararnagnetic resonance. Chemisorption of oxygen leads to the formation of IR-active C-O and C = 0 surface groups. The concentration of paramagnetic sites does not change after the chemisorption of oxygen; this is manifested only by a broadening of the EPR line.

📜 SIMILAR VOLUMES

XPS study of carbon in electrochemical r
XPS study of carbon in electrochemical reduction products of poly(tetrafluoroethylene)
✍ Ladislav Kavan; Zdeněk Bastl; František P. Dousek; Jiří Jansta 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 465 KB

XPS spectra of reaction products of polyttetrafluoroethylene) with lithium amalgam were studied. The primary reaction product is a mixture of LiF and elementary carbon in the sp-state in a molar ratio of ?: I. This carbon is very reactive, among others also with respect to air oxidation at room temp

Fixation of bromine to carbon in product
Fixation of bromine to carbon in products of electrochemical reduction of poly-(tetrafluoroethylene)
✍ F.P. Dousek; L. Kavan 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 678 KB

Bromine reacts either in the gas phase or in an aqueous medium with carbon prepared by the electrochemical reduction of poly-(tetrafluoroethylene) with lithium amalgam. The primary reaction product, C(LiF),L&,, is rather resistant against bromine at room temperature. The high reactivity of carbon in

EPR study of carbon in the products of t
EPR study of carbon in the products of the electrochemical reduction of poly(tetrafluoroethylene)
✍ L. Kavan; J. Klíma; M. Pšeidlová 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 618 KB

The EPR spectra of elemental carbon in the products of the electrochemical reduction of poly(tetrafluoroethylene) by lithium amalgam were studied. The primary product of the reduction, C(LiF)2Li0,,, contains 2.1. 1020 spinsimol. The concentration of the spin centers in partially reacted poly(tetrafl

Electronic resistivity of carbon in the
Electronic resistivity of carbon in the product of electrochemical reduction of poly(tetrafluoroethylene), I
✍ Ladislav Kavan; František P. Dousek; Karel Micka; Jan Weber 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 827 KB

The product of electrochemical reduction of poly(tetrafluoroethylene) (a mixture of elemental carbon and LiF) is an electronic conductor with a time-dependent resistivity, whose value at room temperature decreases by one to two orders of magnitude within one year after the preparation. This decrease