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在≈1 nm 尺度上揭示了格子压缩

Ziwei Xu^1,2, Hongwei Dong¹, Wanmiao Gu^1,3

¹Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China.

Angewandte Chemie (International ed. in English)

|July 10, 2023

概括

研究人员首次在金纳米集群中实现了晶格压缩,提高了二氧化碳的减少. 这种格子调方法提供了一种改善金属纳米集群特性和催化活性的新方法.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
催化剂是一种催化剂.

背景情况:

纳米尺度上的格子调整具有挑战性,以前未曾观察到的~1nm尺度的格子压缩.
格子压缩可能产生不寻常的特性,需要实验验证.

研究的目的:

为了实现和特征格子压缩在一个~1纳米金纳米团的第一次.
调查格子压缩对减少二氧化碳的电催化活性的影响.

主要方法:

连接物诱导被用来合成金纳米集群.
单晶X射线晶体学被用来检测格子压缩.
测量了减少二氧化碳的电催化活性.
进行了理论计算,以了解结构-活动关系.

主要成果:

在~1纳米金纳米集群 (Au52(CHT) 28中实现了格子压缩,特别是将 (110) 面格子距离从4.51到3.58 Å压缩.
与对照样本相比,格子压缩的纳米集群显示出较高的电催化活性,用于减少二氧化碳.
对于 (111) 和 (100) 面,没有观察到格子距离的变化.

结论:

连接物诱导是一种有效的策略,可以在金纳米集群中实现纳米级晶格压缩.
格子压缩显著提高了减少二氧化碳的电催化性能.
格子调是一种可行的方法来定制金属纳米集群的特性和催化活性.

关键词:

减少二氧化碳减少二氧化碳黄金黄金黄金黄金不同质的催化剂.格子压缩格子压缩纳米集群的纳米集群

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