Cyclic Voltammetry, FTIRS, and DEMS Study of the Electrooxidation of Carbon Monoxide, Formic Acid and Methanol on Cyanide-Modified Pt(111) Electrodes

Angel Cuesta, Maria Escudero, Barbora Lanova, Helmut Baltruschat

Research output: Contribution to journalArticle

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Abstract

We have used cyanide-modified Pt(111) electrodes, in combination with cyclic voltammetry (CV), Fourier transform infrared spectroscopy (FTIRS), and differential electrochemical mass spectrometry (DEMS), to investigate the oxidation of formic acid and methanol on Pt electrodes. Since CO is the poison intermediate formed during the oxidation of both formic acid and methanol, we have previously characterized the CO adlayer on cyanide-modified Pt(111) electrodes. Poison formation on cyanide-modified Pt(111) is nearly completely inhibited in the case of formic acid and methanol, the corresponding electro-oxidation reaction proceeding, hence, exclusively through the reactive intermediate pathway. These results suggest that, in the oxidation of formic acid and methanol, the formation of adsorbed CO would require the presence of at least three contiguous Pt atoms.
Original languageEnglish
Pages (from-to)6500-6507
Number of pages8
JournalLangmuir
Volume25
Issue number11
Early online date28 Apr 2009
DOIs
Publication statusPublished - 2 Jun 2009

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formic acid
Electrooxidation
Formic acid
Cyanides
cyanides
Carbon Monoxide
Carbon monoxide
carbon monoxide
Cyclic voltammetry
Fourier transform infrared spectroscopy
Mass spectrometry
Methanol
mass spectroscopy
methyl alcohol
infrared spectroscopy
poisons
oxidation
Electrodes
electrodes
Poisons

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Cyclic Voltammetry, FTIRS, and DEMS Study of the Electrooxidation of Carbon Monoxide, Formic Acid and Methanol on Cyanide-Modified Pt(111) Electrodes. / Cuesta, Angel; Escudero, Maria; Lanova, Barbora; Baltruschat, Helmut.

In: Langmuir, Vol. 25, No. 11, 02.06.2009, p. 6500-6507.

Research output: Contribution to journalArticle

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abstract = "We have used cyanide-modified Pt(111) electrodes, in combination with cyclic voltammetry (CV), Fourier transform infrared spectroscopy (FTIRS), and differential electrochemical mass spectrometry (DEMS), to investigate the oxidation of formic acid and methanol on Pt electrodes. Since CO is the poison intermediate formed during the oxidation of both formic acid and methanol, we have previously characterized the CO adlayer on cyanide-modified Pt(111) electrodes. Poison formation on cyanide-modified Pt(111) is nearly completely inhibited in the case of formic acid and methanol, the corresponding electro-oxidation reaction proceeding, hence, exclusively through the reactive intermediate pathway. These results suggest that, in the oxidation of formic acid and methanol, the formation of adsorbed CO would require the presence of at least three contiguous Pt atoms.",
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