Highly Chemoselective Reduction of Nitroarenes Using a Titania-Supported Platinum-Nanoparticle Catalyst under a CO Atmosphere
Highly Chemoselective Reduction of Nitroarenes Using a Titania-Supported Platinum-Nanoparticle Catalyst under a CO Atmosphere
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在 CO 气氛下使用二氧化钛负载的铂纳米粒子催化剂对硝基芳烃进行高度化学选择性还原
DOI：
10.1002/cjoc.201600715
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发表时间：
2017
影响因子：
5.4
通讯作者：
Cao Yong
中科院分区：
文献类型：
--
作者：
Li Shushuang;Wang Fuzerong;Liu Yongmei;Cao Yong
负载型金催化剂在环境温度下可以促进CO/H2O介导的还原，这一发现对化学选择性合成很重要，近年来受到了极大的关注。铂族金属（PGM）的替代催化剂是否能表现出如此优异的性能，因此是一个有趣的研究课题。到目前为止，没有PGM催化剂在环境温度下显示出CO/H2O介导的还原活性。在这里，我们证明了通过调节金属-载体界面的界面结构和电子性质，可以将非活性转化为高活性和高选择性的催化剂，用于CO/H2O介导的还原。因此，高活性和化学选择性的氢化Pt、Ir、Rh和Pd催化剂可以通过借助于简单的催化剂活化程序用部分还原的载体物质修饰暴露的金属面来制备。通过这种方式，可以在温和条件下显著促进以前未被重视的PGM催化的CO分子活化，这不仅可以为揭示负载型PGM的内在催化潜力做出重大贡献，而且还可以建立更可持续和工业相关的方法。
The discovery that supported gold catalysts can promote CO/H2O‐mediated reduction at ambient temperatures is important to chemoselective synthesis and has gained significant attention in recent years. Whether the alternative Pt group metal (PGM) catalysts can exhibit such exceptional performance is thus an interesting research issue. So far, no PGM catalyst shows activity for CO/H2O‐mediated reduction at ambient temperatures. Here, we demonstrate that it is possible to transform nonactive into highly active and selective catalysts for CO/H2O‐mediated reduction by modulating the interfacial structure and electronic properties at the metal‐support interfaces. Thus, highly active and chemoselective hydrogenation Pt, Ir, Rh and Pd catalysts can be prepared by decorating the exposed metal faces with partially reduced support species by means of a simple catalyst activation procedure. In this way, it has been possible to dramatically facilitate the previously unappreciated PGM‐catalyzed activation of CO molecules under mild conditions, which can make a significant contribution not only to reveal the intrinsic catalytic potential of supported PGMs but also to establish a more sustainable and industrially‐relevant process.