Crystalline Facet-Directed Generation Engineering of Ultrathin Platinum Nanodendrites

Xu, DD (Xu, Dongdong)[ 1 ] ; Lv, H (Lv, Hao)[ 1 ] ; Jin, HB (Jin, Haibao)[ 2 ] ; Liu, Y (Liu, Ying)[ 1 ] ; Ma, YH (Ma, Yanhang)[ 3 ] ; Han, M (Han, Min)[ 1 ] ; Bao, JC (Bao, Jianchun)[ 1 ]*（包建春）; Liu, B (Liu, Ben)[ 1 ]*（刘犇）

[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China

[ 2 ] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

[ 3 ] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

JOURNAL OF PHYSICAL CHEMISTRY LETTERS，201902,10(3), 663-671

In this work, we successfully prepare two-dimensional ultrathin single-crystalline platinum nanodendrites (PtNDs) with precisely controlled generation (size) through a surfactant-directed solution-phase synthesis. The amphiphilic surfactant of C22H45-N+(CH3)(2)CH2COOH (Br-) acts as the structure-directing template and facet-capping agent simultaneously to kinetically engineer in-the-plane epitaxial growth of Pt nanocrystals along selectively exposed {111} facets into ultrathin PtNDs. A novel formation mechanism defined as crystalline facet-directed step-by-step in-the-plane epitaxial growth, similar to the synthesis of organic dendrimers, is proposed on the basis of the nanostructure and crystalline evolution of PtNDs. The generation growth process is readily extended to precisely engineer the generation of PtNDs (from 0 to 25) and can also be utilized to grow other noble metal NDs (e.g., PdNDs and AuNDs) and core-shell Pt-Pd NDs. Because of the structural advantages, ultrathin PtNDs exhibit enhanced electrocatalytic performance toward hydrogen evolution reaction.

文章链接：

https://pubs.acs.org.ccindex.cn/doi/10.1021/acs.jpclett.8b03861

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