The effect of particle size of ultrafine palladium particles on the electrochemical oxidation of formic acid in a perchloric acid solution has been investigated by cyclic voltammetry (CV) and differential electrochemical mass spectroscopy (DEMS). Except in the hydrogen sorption&sorption region, only
Electrocatalytic oxidation of formaldehyde on ultrafine palladium particles supported on a glassy carbon
โ Scribed by Xiao-Gang Zhang; Yasushi Murakami; Kiyochika Yahikozawa; Yoshio Takasu
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 470 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0013-4686
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โฆ Synopsis
The effect of the particle size of ultrafine palladium particles supported on a flat and dense glassy carbon on the electrochemical oxidation of formaldehyde in a perchloric acid solution has been investigated by cyclic voltammetry (CV) and differential electrochemical mass spectroscopy (DEMS). A maximum for the specific activity of the oxidation of HCHO on palladium particles was observed at cu 4.3 nm in diameter. The current density for HCHO oxidation became very low with a decrease in the palladium particle size. As the oxidation product of HCHO, only carbon dioxide was detected by the DEMS as with the oxidation of HCOOH.
๐ SIMILAR VOLUMES
Ultrafine Au particles were supported on flat glassy carbon substrates with fine dispersion, by means of the vacuum evaporation technique. Highest activities toward the HCHO oxidation in alkaline media were obtained with the electrodes of intermediate amounts of Au deposited.