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Atomic Oxygen Activation Alcohol Electro-Oxidation

Atomic Oxygen Activation Alcohol Electro-Oxidation [Pg.235]

The electro-oxidation in a fuel cell of low molecular mass alcohols, such as methanol and ethanol, appears particularly convenient for two main reasons they are liquids [Pg.235]

On a pure Pf/C catalyst, Rousseau et showed that the electro-oxidation of ethanol at the anode of a DEFC working at 80°C mainly led to the formation of acetaldehyde, acetic acid and carbon dioxide, with chemical yields of 47.5%, 32.5% and 20.0%, respectively. By comparing the mass yield and the faradic yields, they concluded that no other products were formed in a significant amount. This result confirms that Pt is able to break the C-C bond to some extent In situ infrared measurements on ethanol adsorption and electro-oxidation at platinum electrodes have clearly shown that the adsorbed CO species are formed from 0.3 V vs RHE at the platinum surface moreover Iwasita and Pastor found some traces of CH4 at potentials lower than 0.4 V vs RHE. Previous studies showed that the initial steps of ethanol adsorption and oxidation on Pt can follow two different modes  [Pg.237]

It was shown by Hitmi et al. that acetaldehyde was formed at potentials lower than 0.6 V vs RHE. From long-term electrolysis experiments on a Pt catalyst coupled with high performance liquid chromatography (HPLC) analyses, Vigier et al. detected acetaldehyde at potentials as low as 0.35 V vs RHE whereas no acetic acid was detected in this potential range. It could then be proposed that at E 0.6 V vs RHE the ethanol electro-oxidation occurs following the mechanism  [Pg.237]

At E 0.4 V vs RHE, where acetaldehyde is formed, it can adsorb on platinum and form a Pt-CH3-CO species according to  [Pg.237]


Atomic Oxygen Activation Alcohol Electro-Oxidation... [Pg.235]


See other pages where Atomic Oxygen Activation Alcohol Electro-Oxidation is mentioned: [Pg.88]    [Pg.243]    [Pg.325]   


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Activated oxidation

Activated oxygen

Activation oxidation

Active oxides

Active oxygen

Activity oxidation

Alcohol activation

Alcohol atoms

Alcohols, oxygenates

Atoms oxidation

Electro-oxidation

Oxidation oxygen activation

Oxidative activation

Oxides activated

Oxidizing activators

Oxygen activation

Oxygen activators

Oxygen alcohol

Oxygen atom

Oxygen atomic

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