Small molecules control the formation of Pt nanocrystals: a key role of carbon monoxide in the synthesis of Pt nanocubes.

In many previous studies, nonaqueous synthesis of Pt nanocubes with tunable size has been achieved by the use of metal carbonyls (e.g., Fe(CO)(5), Co(2)(CO)(8), W(CO)(6)). The presence of zero-valent metals in the carbonyls was demonstrated as the key factor to the nanocube formation but the role of CO was entirely ignored. By using CO alone, we have now demonstrated that the favorable growth of Pt nanocubes in the presence of CO is mainly owing to the effect that the Pt (100) surface is stabilized by the co-adsorption of CO and amine.

[1]  Aicheng Chen,et al.  Platinum-based nanostructured materials: synthesis, properties, and applications. , 2010, Chemical reviews.

[2]  Jianbo Wu,et al.  Electrochemical synthesis and catalytic property of sub-10 nm platinum cubic nanoboxes. , 2010, Nano letters.

[3]  Qiang Wang,et al.  High-index faceted platinum nanocrystals supported on carbon black as highly efficient catalysts for ethanol electrooxidation. , 2010, Angewandte Chemie.

[4]  J. Arbiol,et al.  Synthesis of platinum cubes, polypods, cuboctahedrons, and raspberries assisted by cobalt nanocrystals. , 2010, Nano letters.

[5]  Shouheng Sun,et al.  A general approach to the size- and shape-controlled synthesis of platinum nanoparticles and their catalytic reduction of oxygen. , 2008, Angewandte Chemie.

[6]  K. Philippot,et al.  Shape Control of Platinum Nanoparticles , 2007 .

[7]  Zhi-You Zhou,et al.  Nanoparticle catalysts with high energy surfaces and enhanced activity synthesized by electrochemical method. , 2008, Faraday discussions.

[8]  T. C. Green,et al.  Shape-Controlled Synthesis of Colloidal Platinum Nanoparticles , 1996, Science.

[9]  H. Gasteiger,et al.  Oxygen reduction on platinum low-index single-crystal surfaces in sulfuric acid solution. Rotating ring - Pt(hkl) disk studies , 1995 .

[10]  Junliang Zhang,et al.  Truncated octahedral Pt(3)Ni oxygen reduction reaction electrocatalysts. , 2010, Journal of the American Chemical Society.

[11]  Jiye Fang,et al.  A general strategy for preparation of Pt 3d-transition metal (Co, Fe, Ni) nanocubes. , 2009, Journal of the American Chemical Society.

[12]  Kyriakos Komvopoulos,et al.  Platinum nanoparticle shape effects on benzene hydrogenation selectivity. , 2007, Nano letters.

[13]  Shouheng Sun,et al.  Synthesis of monodisperse Pt nanocubes and their enhanced catalysis for oxygen reduction. , 2007, Journal of the American Chemical Society.

[14]  Liangti Qu,et al.  Shape/size-controlled syntheses of metal nanoparticles for site-selective modification of carbon nanotubes. , 2006, Journal of the American Chemical Society.

[15]  Peidong Yang,et al.  Sub-10 nm platinum nanocrystals with size and shape control: catalytic study for ethylene and pyrrole hydrogenation. , 2009, Journal of the American Chemical Society.

[16]  Peidong Yang,et al.  Morphological control of catalytically active platinum nanocrystals. , 2006, Angewandte Chemie.

[17]  Zhong Lin Wang,et al.  Synthesis of Tetrahexahedral Platinum Nanocrystals with High-Index Facets and High Electro-Oxidation Activity , 2007, Science.

[18]  R. Tilley,et al.  Shape-controlled growth of platinum nanoparticles. , 2007, Small.

[19]  R. Tilley,et al.  Preparation, self-assembly, and mechanistic study of highly monodispersed nanocubes. , 2007, Journal of the American Chemical Society.

[20]  Zhi-You Zhou,et al.  Platinum Metal Catalysts of High-Index Surfaces: From Single-Crystal Planes to Electrochemically Shape-Controlled Nanoparticles , 2008 .

[21]  Shenhao Chen,et al.  Preparation, phase transfer, and self-assembled monolayers of cubic Pt nanoparticles , 2002 .

[22]  G. Somorjai,et al.  Monodisperse platinum nanoparticles of well-defined shape: synthesis, characterization, catalytic properties and future prospects , 2006 .