A General Approach to the Size‐ and Shape‐Controlled Synthesis of Platinum Nanoparticles and Their Catalytic Reduction of Oxygen

Catalytic cobblestones: Monodisperse platinum nanoparticles were prepared with controlled sizes (3–7 nm) and shapes (polyhedron, truncated cube, or cube). The cubic nanoparticles are a much more active cathode catalyst for the oxygen reduction reaction: the current density J from 7 nm cubes is four times that of the other shapes (see picture), indicating great potential for fuel cell applications. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z800073_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.