在结构上可比的Pd-Au纳米集群中,以异原子数量为依赖的集群框架
1Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, P. R. China. kangxi_chem@ahu.edu.cn.
Nanoscale
|January 27, 2025
概括
将 (Pd) 合金化成金 (Au) 纳米集群改变了它们的结构和电催化二氧化碳的减少. 在Pd2Au12中使用较高的Pd兴奋剂破坏了结构,与Pd1Au12相比降低了催化效率.
科学领域:
- 纳米材料科学 科学 纳米材料科学
- 催化剂是一种催化剂.
- 表面化学 表面化学
背景情况:
- 控制纳米集群结构是定制材料特性的关键.
- Heteroatom 兴奋剂提供了一个修改纳米集群框架和功能的途径.
研究的目的:
- 调查不同 (Pd) 兴奋剂水平如何影响金 (Au) 纳米集群的结构.
- 评估结构变化对Pd-Au纳米集群的电催化二氧化碳减排性能的影响.
主要方法:
- 控制合成不同Pd度的Pd合金Au12纳米集群 (Pd1Au12和Pd2Au12).
- 合成的纳米集群的结构确定,以揭示不同的内核配置.
- 对二氧化碳减少进行电催化测试,以评估电流密度和选择性等性能指标.
主要成果:
- Pd1Au12纳米集群采用了二面体框架,而Pd2Au12则表现出 toroidal 结构.
- Pd1Au12纳米集群显示出优越的电催化CO2减少,具有更高的电流密度和更低的开始潜力.
- 与Pd2Au12相比,Pd1Au12实现了更高的CO选择性 (法拉代效率).
结论:
- 在Pd异质原子的兴奋剂的程度显著影响Au纳米集群的结构配置.
- 由Pd兴奋剂诱导的结构变化直接影响电催化二氧化碳减排效率和选择性.
- 这项研究提供了通过控制 Pd 兴奋剂水平来设计定制的 Pd-Au 纳米集群的见解.
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