AuCu合金纳米颗粒对催化CO氧化的晶体结构影响
Wangcheng Zhan1, Jinglin Wang1, Haifeng Wang1
1Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China.
Journal of the American Chemical Society
|June 8, 2017
概括
合金纳米粒子晶体结构显著影响催化. 金铜 (AuCu) 合金纳米颗粒中的不同晶体结构导致不同相分离和增强的CO氧化催化活性.
科学领域:
- 材料科学
- 催化剂
- 纳米技术
背景情况:
- 控制合金纳米粒子 (NP) 的特性可以优化催化.
- 由于合成的挑战,晶体结构在NP催化中的作用尚未得到充分研究.
研究的目的:
- 研究晶体结构对合金NP催化的影响.
- 通过金铜 (AuCu) 合金NP的晶体结构操纵来证明可调节的催化.
主要方法:
- 合成的AuCu合金NP具有面中心立方 (fcc) 和面中心四角形 (fct) 结构.
- 在空气中热NP以诱导相分离并形成核心/外异构.
- 对二氧化碳的催化性能进行评估,重点关注二氧化碳吸附差异.
主要成果:
- 在回火时,Fcc-AuCu NPs比fct-AuCu NPs更容易分离铜 (Cu).
- 化导致分别为fcc和fctNP的Au/CuO和AuCu/CuO核心/外结构.
- 由于CO吸附变化,Fct-AuCu/CuONP显著增强了CO氧化活性.
结论:
- 晶体结构是优化合金NP催化的一个关键,可调的参数.
- 这些发现为设计各种化学反应的高性能合金NP提供了新的策略.
相关概念视频
Heterogeneous Catalysis
9
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
9
Catalysis
31.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
31.1K


