Exploring stereoselectivity of Au25 nanoparticle catalyst for hydrogenation of cyclic ketone
Exploring stereoselectivity of Au25 nanoparticle catalyst for hydrogenation of cyclic ketone
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DOI：
10.1016/j.jcat.2010.02.027
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发表时间：
2010-05-04
影响因子：
7.3
通讯作者：
Jin, Rongchao
中科院分区：
文献类型：
--
作者：
Zhu, Yan;Wu, Zhikun;Jin, Rongchao
探索了原子单分散的Au-25（SR）（18）（其中R=-CH 2CH 2 Ph）纳米颗粒作为立体选择性催化剂用于环酮氢化成环醇产物的一种特定异构体。获得完全（类似于100%）的立体选择性。催化性能与Au-25（SR）（18）超原子的晶体结构和核壳电子性质有关，其中富电子的Au-13核活化C=O键，而缺电子的Au-12壳为H-2的吸附和解离提供活性位。这项工作证明了超小金纳米粒子的催化性能。原子级精确的Au-25（SR）（18）超原子催化剂可作为重要化工过程的加氢催化剂。(C)2010年爱思唯尔公司All rights reserved.
Atomically monodisperse Au-25(SR)(18) (where R=-CH2CH2Ph) nanoparticles are explored as a stereoselective catalyst for hydrogenation of cyclic ketone to one specific isomer of cyclic alcohol product. A complete (similar to 100%) stereoselectivity is obtained. The catalytic performance is correlated with the crystal structure and core-shell electronic nature of Au-25(SR)(18) superatoms, in which the electron-rich Au-13 core activates the C=O bond, whereas the electron-deficient Au-12 shell provides active sites for H-2 adsorption and dissociation. This work demonstrates promising catalytic performance of ultrasmall gold nanoparticles. The atomically precise Au-25(SR)(18) superatom catalyst may be explored as hydrogenation catalysts for some important chemical processes. (C) 2010 Elsevier Inc. All rights reserved.