Efficient Coupling of Solar Energy to Catalytic Hydrogenation by Using Well-Designed Palladium Nanostructures
Efficient Coupling of Solar Energy to Catalytic Hydrogenation by Using Well-Designed Palladium Nanostructures
复制标题
利用精心设计的钯纳米结构将太阳能与催化加氢有效耦合
DOI：
10.1002/anie.201407785
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发表时间：
2015-02-16
影响因子：
16.6
通讯作者：
Xiong, Yujie
中科院分区：
文献类型：
--
作者：
Long, Ran;Rao, Zhoulv;Xiong, Yujie
报道了一种在Ru3+的作用下合成的独特的钯凹面纳米结构，这种结构可以直接获取紫外光到可见光的光，用于苯乙烯的氢化反应。室温下100 mW·cm~(-2)全谱辐射下的催化效率与热驱动反应(70℃)相当。其他钯纳米晶体的产率较低，如纳米立方体和八面体。由于形状对称性的降低，通过光热效应提高了反应的溶液温度，因此本文报道的纳米结构具有足够的等离子体横截面，可以在较宽的光谱范围内捕光。它们在更有效地产生局部热量的角落和边缘拥有大量的原子，从而为反应提供了活跃的位置。综上所述，这些因素极大地加强了光照下的加氢反应。
A Ru3+-mediated synthesis for the unique Pd concave nanostructures, which can directly harvest UV-to-visible light for styrene hydrogenation, is described. The catalytic efficiency under 100mWcm(-2) full-spectrum irradiation at room temperature turns out to be comparable to that of thermally (70 degrees C) driven reactions. The yields obtained with other Pd nanocrystals, such as nanocubes and octahedrons, are lower. The nanostructures reported here have sufficient plasmonic cross-sections for light harvesting in a broad spectral range owing to the reduced shape symmetry, which increases the solution temperature for the reaction by the photothermal effect. They possess a large quantity of atoms at corners and edges where local heat is more efficiently generated, thus providing active sites for the reaction. Taken together, these factors drastically enhance the hydrogenation reaction by light illumination.