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Controlled Formation of Concave Tetrahedral/Trigonal Bipyramidal Palladium Nanocrystals

2009; American Chemical Society; Volume: 131; Issue: 39 Linguagem: Inglês

10.1021/ja9059409

1943-2984

Xiaoqing Huang, Shaoheng Tang, Huihui Zhang, Zhi‐You Zhou, Nanfeng Zheng,

Gold and Silver Nanoparticles Synthesis and Applications

Novel concave Pd nanocrystals with uniform diameter were successfully prepared in the presence of formaldehyde. While the outer surfaces of the as-prepared concave Pd nanocrystals are {111}, the faces concave toward the polyhedral center are high-surface-energy {110} faces. The degree of concavity and therefore the percentage of {110} of the nanocrystals are tunable by varying the amount of formaldehyde and the reaction temperature. Owing to the existence of active {110} facets, the electrocatalytic activity of the concave Pd nanocrystals displays dependency on their degree of concavity.