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相关概念视频

Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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X-ray Crystallography02:18

X-ray Crystallography

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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
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相关实验视频

Updated: Feb 24, 2026

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
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插曲大量黄金晶体成有序的单个原子.

Rong Rong1, Wenfa Chen1, Pin Lyu1

  • 1State Key Laboratory of Mechanics and Control of Aerospace Structures and Institute for Frontier Science, Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Advanced materials (Deerfield Beach, Fla.)
|February 22, 2026
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种绿色,无溶剂的方法来制造高密度黄金单个原子 (GSAs) 用于催化. 这种自上而下的间隔技术为合成高效的电催化剂提供了一个可扩展和环保的替代方案.

关键词:
密度函数理论计算 密度函数理论计算黄金单个原子的原子.它们是间歇性干扰.是一种的物质.扫描道显微镜 扫描道显微镜

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科学领域:

  • 材料科学 材料科学 材料科学
  • 表面化学 表面化学
  • 催化剂是一种催化剂.

背景情况:

  • 黄金单个原子 (GSAs) 对电催化和光催化反应具有前景.
  • 高密度GSA合成的传统方法面临着诸如废物产生和不受控制的分配等挑战.

研究的目的:

  • 开发一种新的,可扩展的,环保的方法来合成和塑造高密度黄金单个原子.
  • 为了研究这些GSAs对和氧进化反应的催化活性.

主要方法:

  • 一种使用单层切割黄金 (100) 晶体成单个原子的自上而下间隔方法.
  • 使用扫描道显微镜 (STM),X射线光发射谱学 (XPS) 和密度函数理论 (DFT) 计算进行了表征.

主要成果:

  • 达到高达25%的黄金转化率成为孤立的单个原子.
  • GSAs形成了有序的 (2 × 2) 阵列,没有凝聚的倾向.
  • 由于与层的合较弱,证明了高效的进化反应 (HER) 和氧进化反应 (OER) 催化.

结论:

  • 上下间歇方法提供了一个无缺陷,无溶剂和可扩展的途径,以高密度的GSAs.
  • 合成的GSAs对HER和OER具有出色的催化性能.
  • 这种方法为制备先进催化剂提供了一个可持续的途径,并允许在停用后进行再生.