The mechanism of electrocatalytic oxidation of formic acid on Pt (100) and Pt (111) in sulphuric acid solution: an emirs study
The mechanism of electrocatalytic oxidation of formic acid on Pt (100) and Pt (111) in sulphuric acid solution: an emirs study
- J. Electroanal. Chem., 240(1-2), p.147-159, 1988 .
The oxidation of formic acid at single crystal Pt (111)and Pt (100)electrodes in aqueous sulphuric acid was investigated using in-situ IR spectroscopy. The strongly adsorbed poisoning species, CO,,,, was formed more slowly and to a lesser extent on the (111)surface. Correlation between the voltammetry and the spectra led to the assignment of broad bands near 1750 cm-' to absorption by reactive intermediates, probably (COOH),,,. A detailed reaction scheme consistent with the electrochemical and spectroelectrochemical data and featuring linked, parallel pathways involvmg adsorbed poison and adsorbed reactive intermediate, is presented.
The oxidation of formic acid at single crystal Pt (111)and Pt (100)electrodes in aqueous sulphuric acid was investigated using in-situ IR spectroscopy. The strongly adsorbed poisoning species, CO,,,, was formed more slowly and to a lesser extent on the (111)surface. Correlation between the voltammetry and the spectra led to the assignment of broad bands near 1750 cm-' to absorption by reactive intermediates, probably (COOH),,,. A detailed reaction scheme consistent with the electrochemical and spectroelectrochemical data and featuring linked, parallel pathways involvmg adsorbed poison and adsorbed reactive intermediate, is presented.