一个高核度的硫化铜纳米集群[S-Cu50] 具有Cu (II) /Cu (I) 价值的双结构配置
Cheng Xu1, Yuhao Jin1, Hao Fang1
1Interdisciplinary Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
Journal of the American Chemical Society
|October 27, 2023
概括
我们开发了一种新方法来制造原子精确的硫化铜纳米集群. 这种新型的[S-Cu50]纳米聚合物具有独特的结构,并显示出电催化学的前景.
科学领域:
- 材料科学
- 纳米技术
- 无机化学
背景情况:
- 原子精确的纳米集群 (NC) 对于先进的应用至关重要.
- 合成二元半导体纳米集群 (BS-NC) 需要精确控制反应动力学,以确保单相形成.
- 之前的方法通常会导致多个阶段,使NC合成复杂化.
研究的目的:
- 开发一种可靠的合成原子精确硫化铜纳米集群的方法.
- 描述新型硫化铜纳米集群的结构,电子特性和潜在应用.
- 在BS-NC合成过程中克服控制相形成的挑战.
主要方法:
- 采用了酸辅助的硫酸盐解离方法.
- 在Cu-S-R前体中S-C键的裂变促进了[Cu-S-Cu]骨架的形成.
- 单晶X射线衍射用于原子结构的确定.
主要成果:
- 成功合成了高核度的硫化铜纳米集群,Cu50S12 ([S-Cu50])
- 发现了一个独特的双结构 ([Cu14S12]@[Cu36S20]) 在内核中具有前所未有的罗姆二面体几何.
- 证实了混合Cu (II) /Cu (I) 价值的存在,确定[S-Cu50]是第一个原子精确的硫化铜NC.
- 使用各种光学和理论方法来描述电子结构.
- 通过四电子通路在氧降解反应 (ORR) 中证明了空气稳定性和电催化活性.
结论:
- 开发的酸辅助方法可实现复杂,原子精确的BS-NC的高产合成.
- [S-Cu50]代表了NC设计的重大进步,具有新的结构和混合价值.
- [S-Cu50]的独特特性表明其在催化,特别是ORR中的潜在应用.
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