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…