Visible to near-infrared plasmon-enhanced catalytic activity of Pd hexagonal nanoplates for the Suzuki coupling reaction
Visible to near-infrared plasmon-enhanced catalytic activity of Pd hexagonal nanoplates for the Suzuki coupling reaction
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DOI：
10.1039/c5nr03841c
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发表时间：
2015-01-01
期刊：
影响因子：
6.7
通讯作者：
Teranishi, Toshiharu
中科院分区：
文献类型：
--
作者：
Trinh, T. Thuy;Sato, Ryota;Teranishi, Toshiharu
太阳能到化学能的光催化转化是绿色化学中的有效过程，因为其通过在光催化剂中产生电子激发态而促进室温化学转化。我们在这里报告的强大的合成，详细的结构表征，特别是光催化性能的等离子体Pd六角纳米片的化学反应。Pd六方纳米片为孪晶结构，其顶面和底面由具有堆垛层错的{111}面包围，侧面由六个{111}面和六个{100}面混合包围。具有良好定义和可调谐的纵向局域表面等离子体共振（LSPR）的Pd六方纳米片使得能够直接收获可见光到近红外光用于催化交叉偶联反应。在等离子体激发下，碘苯和苯硼酸的催化Suzuki偶联反应通过等离子体诱导的热电子的等离子体光催化效应而加速。在用λ = 300-1000 nm氙灯以176 mW cm（-2）照射的反应中，Pd六方纳米片的转换频率（TOF）分别比非等离子体{111}封闭的Pd纳米八面体和{100}封闭的Pd纳米立方体的转换频率高2.5倍和2.7倍，并且比当反应被热加热到相同温度时获得的TOF高1.7倍。
Photocatalytic conversion of solar energy to chemical energy is an efficient process in green chemistry because it facilitates room temperature chemical transformations by generating electronically excited states in photocatalysts. We report here on the robust synthesis, detailed structural characterization, and especially photocatalytic properties of plasmonic Pd hexagonal nanoplates for chemical reactions. The Pd hexagonal nanoplates are twin crystals, and composed of the top and bottom faces enclosed by the {111} planes with stacking faults and the side surfaces bound by mixed six {111} and six {100} planes. The Pd hexagonal nanoplates with well-defined and tunable longitudinal localized surface plasmon resonance (LSPR) have enabled the direct harvesting of visible to near-infrared light for catalytic cross coupling reactions. Upon plasmon excitation, the catalytic Suzuki coupling reactions of iodobenzene and phenylboronic acid accelerate by a plasmonic photocatalytic effect of plasmon induced hot electrons. The turnover frequency (TOF) of the Pd hexagonal nanoplates in a reaction illuminated with a lambda = 300-1000 nm Xenon lamp at 176 mW cm(-2) was 2.5 and 2.7 times higher than that of non-plasmonic {111}-enclosed Pd nanooctahedra and {100}-enclosed Pd nanocubes, respectively, and 1.7 times higher than the TOF obtained when the reaction was thermally heated to the same temperature.