Formate adsorption on Pt nanoparticles during formic acid electro oxidation: insights from in situ infrared spectroscopy.
Adsorbed formate is observed on a supported Pt nanoparticle for the first time during formic acid electro oxidation. Bands assigned to OCO stretching and CH bending reveal some OCO but little CH bond weakening on adsorption compared to the free anion. The formate potential dependence is similar to polycrystalline electrodes while adsorbed CO persists up to +1.2 V, 0.5 V higher than on polycrystalline Pt.
Chemical communications