为选择性CO化设计高效的单原子合金催化剂:第一原则,主动学习和微动力学研究
Haisong Feng1,2, Meng Zhang1, Zhen Ge1
1State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
研究人员设计了新的单原子合金 (SAA) 用于选择性化不和化物. Ti1Au SAA有效地将克罗托纳尔化物转化为高选择性和转化率的克罗醇.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 计算化学计算化学
背景情况:
- 选择性化α,β-不和化物到不和酒精对于有机合成,制药和食品生产至关重要.
- 碳 (CO) 键对碳-碳双键 (CC) 的精确化具有挑战性,需要量身定制的催化剂.
- 单原子合金 (SAA) 具有针对性键激活的潜力,但仍难以确定合适的SAA.
研究的目的:
- 设计高效和选择性的单原子合金 (SAA) 用于化α,β不和化物.
- 为了确定特定的SAA组合和表面面,能够选择性地激活CO键.
- 为选择性化催化剂的合理设计建立一个计算方法.
主要方法:
- 密度函数理论 (DFT) 计算,主动学习和微动力学模拟的协同组合.
- 对264个表面的66个SAA进行了全面评估,以评估CC和CO债券激活潜力.
- 在选择的Ti1Au表面上进行的微动力学模拟,使用克罗托纳尔化物作为模型基质.
主要成果:
- Ti1Au SAA在CO债券激活方面表现出极好的选择性.
- Ti1Au(320) 和Ti1Au(111) 表面表现出高的催化活性,低的激活能量屏障为0.60 eV.
- 微动力学模拟显示,几乎100%的转化为醇,对Ti1Au(320) 和Ti1Au(111) 催化剂具有显著的选择性,在373-553K之间.
结论:
- 新型Ti1Au单原子合金是选择性化α,β不和合物的有效催化剂.
- 这项研究展示了一种强大的计算方法,用于设计高度选择性的化催化剂.
- 这项工作为开发化学合成和工业应用的先进催化剂提供了途径.
更多相关视频
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
10:19Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
Published on: July 18, 2017
相关概念视频
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Catalysis
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
Introduction to Mechanisms of Enzyme Catalysis
