通过单个原子的协调迁移产生活性金属/氧化物反向接口.
Lina Zhang1,2, Shaolong Wan1, Congcong Du1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen, 361005, China.
Nature communications
|February 9, 2024
概括
研究人员在催化材料中发现了新的活性位点. 由原子迁移形成的金属/氧化物反向接口显著增强了用于甲氧化等应用的催化剂反应性.
科学领域:
- 不同质的催化剂.
- 材料科学是一种材料科学.
- 表面化学 表面化学
背景情况:
- 识别活性位点对于设计高反应性催化剂至关重要.
- 传统的活性点包括单个原子,纳米粒子和金属/氧化物接口.
研究的目的:
- 研究金属/氧化物反向接口作为异质催化剂中的新型活性位点.
- 为了证明这些反向接口的形成和催化活性.
主要方法:
- 在 (Pd1/CeO2) 上使用原子捕获制备单原子催化剂.
- 催化剂的蒸汽处理以诱导协调的原子迁移.
- 处理前后催化剂的表征.
- 测试甲氧化的催化活性.
主要成果:
- Pd1/CeO2催化剂,最初在30°C处不活跃,在蒸汽处理后完全氧化甲.
- 蒸汽处理诱导了和原子的协调迁移,形成了一个Ce2O3-Pd纳米粒子域接口.
- 这种新形成的金属氧化物-金属接口负责增强的催化活性.
结论:
- 由协调原子迁移形成的金属/氧化物反向接口代表了一类新的活性位点.
- 这一发现扩大了对异质催化中的活性位形成的理解.
- 金属单原子材料可以作为生成这些新型活性接口的前体.
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