Spectroscopic investigation of Pt—methanol interface in perchloric acid medium by sum-frequency generation

✍ Scribed by A. Peremans; A. Tadjeddine

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 477 KB
• Volume: 220
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)00209-6

✦ Synopsis

We recorded vibrational spectra of the CO poison resulting from the electrochemical decomposition of CHsOH on platinum by sum-frequency generation using the infrared free electron laser CLIO. At high CHsOH concentration ( 3 0.1 M) in the electrolyte, both multi-bonded and linearly bonded CO are equally present. At lower CH30H concentration (0.004 M), the multibonded species is predominant. The CO poison still remains on the surface at potentials (0.05 V/NHE) close to the hydrogen evolution onset.