六原子Pt催化剂是通过合体工程策略制造的,用于高效的氧化反应
Li Yan1, Dunchao Wang1, Mengjiao Li2
1State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China.
Angewandte Chemie (International ed. in English)
|July 8, 2024
概括
研究人员在氧化碳纳米管上开发了一种新的-6纳米催化剂,用于高效的氧化反应. 与商业替代品相比,这种原子精确的支持纳米集群催化剂显示出卓越的性能和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术 纳米技术
背景情况:
- 原子精确的支持纳米集群催化剂 (APSNCs) 提供了对结构-性能关系的见解.
- 在控制APSNC的原子组成,结构,分散和稳定性方面存在挑战.
研究的目的:
- 制定制造具有控制金属原子数的稳定APSNC的战略.
- 为了研究一种新的-6纳米集群催化剂的催化性能.
主要方法:
- 在氧化碳纳米管 (Pt6/OCNT) 上合成 Pt6 纳米集团的连接体工程策略.
- 结构分析以确认纳米集群结构和暴露.
- 对氧化反应 (HOR) 的性能和稳定性的电化学测试.
- 密度函数理论 (DFT) 计算以了解催化机制.
主要成果:
- Pt6纳米集群在OCNT上完全暴露,具有平面结构.
- Pt6/OCNT表现出高质量活性 (18.37 A·mgPt-1),以及对酸性HOR.的良好稳定性.
- 与商业Pt/C相比,催化剂表现出更高的性能和CO耐受性.
- DFT的计算显示了吸附能量的变化,并减少了HOR过量的潜力.
结论:
- 连接体工程是一种有效的策略,用于创建稳定的APSNC.
- 作为能源应用的先进电催化剂,Pt6/OCNT显示出显著的前景.
- 这项工作为设计用于高效电触媒的APSNC开辟了新的途径.
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