Department of Materials Engineering Science, Graduate School of Engineering Science and ‡Research Center for Solar Energy Chemistry, Osaka University , 1-3, Machikaneyama, Toyonaka, Osaka 560-8531, Japan.
J Am Chem Soc. 2015 Oct 28;137(42):13452-5. doi: 10.1021/jacs.5b07521. Epub 2015 Oct 20.
We report a facile synthesis of new core-Au/shell-CeO2 nanoparticles (Au@CeO2) using a redox-coprecipitation method, where the Au nanoparticles and the nanoporous shell of CeO2 are simultaneously formed in one step. The Au@CeO2 catalyst enables the highly selective semihydrogenation of various alkynes at ambient temperature under additive-free conditions. The core-shell structure plays a crucial role in providing the excellent selectivity for alkenes through the selective dissociation of H2 in a heterolytic manner by maximizing interfacial sites between the core-Au and the shell-CeO2.
我们报告了一种使用氧化还原共沉淀法制备新型核-Au/壳-CeO2 纳米粒子（Au@CeO2）的简便方法，其中 Au 纳米粒子和 CeO2 的纳米多孔壳同时在一步中形成。Au@CeO2 催化剂在无添加剂条件下，于环境温度下实现了各种炔烃的高选择性半氢化。核壳结构通过最大限度地增加核-Au 和壳-CeO2 之间的界面位点，以异裂方式选择性地解离 H2，从而对烯烃提供优异的选择性，这在其中起着至关重要的作用。
