Comparison of formic acid oxidation at supported Pt catalyst and at low-index Pt single crystal electrodes in sulfuric acid solution

• Main Authors: AMALIJA V. TRIPKOVIC, KSENIJA DJ. POPOVIC, JELENA D. LOVIC
• Format: Article
• Language: English
• Published: Serbian Chemical Society 2003-11-01
• Series: Journal of the Serbian Chemical Society
• Subjects: formic acid oxidation; Pt single crystals; supported Pt catalyst; particle size; surface distribution of crystallographic sites
• Online Access: http://www.shd.org.yu/HtDocs/SHD/Vol68/No11/V68-No11-09.pdf

The oxidation of formic acid was studied at supported Pt catalyst (47.5 wt%. Pt) and a low-index single crystal electrodes in sulfuric acid. The supported Pt catalyst was characterized by the TEM and HRTEM techniques. The mean Pt particle diameter, calculated from electrochemical measurements, fits well with Pt particle size distribution determined by HRTEM. For the mean particle diameter the surface averaged distribution of low-index single crystal facets was established. Comparison of the activities obtained at Pt supported catalyst and low-index Pt single crystal electrodes revealed that Pt(111) plane is the most active in the potential region relevant for fuel cell applications.