Journal
LANGMUIR
Volume 25, Issue 11, Pages 6500-6507Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la8041154
Keywords
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Funding
- Ministerio de Educacion y Ciencia [CTQ2006-02109]
- DFG-CSIC
- Spanish Ministry for Education and Science
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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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