Methanol, Formaldehyde, and Formic Acid Adsorption/Oxidation on a Carbon-Supported Pt Nanoparticle Fuel Cell Catalyst: A Comparative Quantitative DEMS Study - Fuel Cell Catalysis: A Surface Science Approach - page 419

Figure 13.3 Potentiodynamic electrooxidation of (a) formic acid, (b) formaldehyde, and
(c) methanol on a Pt/Vulcan thin-film electrode (7 mg Pt cm 22 , geometric area 0.28 cm 2 )in
0.5 M H 2 SO 4 solution containing 0.1 M HCOOH (a), HCHO (b), or CH 3 OH (c). The potential
scan rate was 10 mV s 21 and the electrolyte flow rate was 5 mLs 21 , at room temperature). The
top panels show the faradaic current (solid lines), the partial currents for C 1 oxidation to CO 2
(dashed lines) and for formic acid formation (dash-dotted line), calculated from the respective
ion currents, and the difference between the measured faradaic current and the partial current for
CO 2 oxidation (formic acid oxidation (a), formaldehyde oxidation (b)), or the difference
between faradaic current and the sum of the partial currents for CO 2 formation and formic
acid oxidation (methanol oxidation, (c)) (dotted line). The solid lines in the lower panels in