光化学
催化作用
辐照
光催化
激发态
纳米颗粒
材料科学
过渡金属
金属
可见光谱
分子
化学工程
纳米技术
化学
光电子学
原子物理学
有机化学
物理
核物理学
工程类
冶金
作者
Sarina Sarina,Huaiyong Zhu,Qi Xiao,Esa Jaatinen,Jianfeng Jia,Yiming Huang,Zhanfeng Zheng,Hai‐Shun Wu
标识
DOI:10.1002/anie.201308145
摘要
Supported nanoparticles (NPs) of nonplasmonic transition metals (Pd, Pt, Rh, and Ir) are widely used as thermally activated catalysts for the synthesis of important organic compounds, but little is known about their photocatalytic capabilities. We discovered that irradiation with light can significantly enhance the intrinsic catalytic performance of these metal NPs at ambient temperatures for several types of reactions. These metal NPs strongly absorb the light mainly through interband electronic transitions. The excited electrons interact with the reactant molecules on the particles to accelerate these reactions. The rate of the catalyzed reaction depends on the concentration and energy of the excited electrons, which can be increased by increasing the light intensity or by reducing the irradiation wavelength. The metal NPs can also effectively couple thermal and light energy sources to more efficiently drive chemical transformations.
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