New life of a forgotten method: Electrochemical route toward highly efficient Pt/C catalysts for low-temperature fuel cells
Driven by global environmental concerns, great efforts are currently made to develop novel, cheap and practical means for producing highly efficient electrocatalysts, specifically for the low-temperature fuel-cell applications. Employing an old but yet unexplored method based on electrochemical dispergation of platinum by the alternating current, we show that the freshly prepared Pt/C catalysts exhibit greatly enhanced catalytic activity (up to 350% for oxygen reduction and up to 200% for ethylene glycol oxidation) as compared with that of a commercially available counterpart (E-TEK). A key role in these reactions is attributed to a specific nanoparticle morphology. These findings should provide a revival of an ancient but simple and efficient electrochemical process and motivate further researches in the field.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (139 K)Download as PowerPoint slideHighlights► We highlight novel, simple route for manufacturing Pt/C catalyst for fuel-cell applications. ► This method based on dispergation of Pt electrodes under pulsed alternating current. ► Activity of prepared Pt/C catalyst is significantly higher than commercially counterpart.
Journal: Applied Catalysis A: General - Volumes 431–432, 26 July 2012, Pages 120–125