在CeOx纳米岛上支持的对比原子分散金属催化剂,具有包括化物在内的各种联体环境
Nan Zhang1, Yizhen Chen2, Xu Li3
1Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.
在氧化 (CeOx) 纳米岛上的化连接物与原子分散的 (Pt) 呈现出增强的CO氧化催化. 化物 化物
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
- 表面化学 表面化学
背景情况:
- 在支架上的原子分散金属提供了高原子效率和可调节的电子特性.
- 了解连接体和支持相互作用的作用对于设计高效的催化剂至关重要.
研究的目的:
- 在氧化物 (CeOx) 纳米岛上合成和表征原子分散的 (Pt), (Rh) 和 (Ir),这些纳米岛由 (SiO2) 支.
- 研究这些材料的催化活性,特别是化物联体对基于Pt的CO氧化催化剂的影响.
主要方法:
- 在CeOx/SiO2支上合成原子分散金属,使用含的金属盐.
- 使用X射线吸收光谱学 (XAS) 进行结构性表征.
- 使用密度函数理论 (DFT) 进行计算分析,以了解电子特性和反应机制.
主要成果:
- 在CeOx/SiO2上成功合成原子分散的Pt,Rh和Ir.
- 鉴定发现化学吸收的Pt具有Pt1Cl2O4结构,在化后转化为嵌入式Pt1O6结构.
- 与没有的Pt1O6物种相比,Pt1Cl2O4物种对CO氧化具有更高的催化活性.
结论:
- 化物连接体在增强原子分散的Pt对CO氧化的催化活性方面发挥着至关重要的作用.
- 第一个协调外显著影响单原子催化剂的催化性能.
- 这项研究突出了精确控制散金属原子环境的潜力,以设计催化剂.
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