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Related Concept Videos

Catalysis02:50

Catalysis

30.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
30.1K
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....
20.5K
Bonding in Metals02:32

Bonding in Metals

52.1K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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Alkali Metals03:06

Alkali Metals

24.2K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
24.2K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

24.1K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Properties of Transition Metals02:58

Properties of Transition Metals

29.7K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
29.7K

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Atomically Precise Metal Nanoclusters for Catalysis.

Xiangsha Du1, Rongchao Jin1

  • 1Department of Chemistry , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States.

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|June 28, 2019
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Summary
This summary is machine-generated.

Atomically precise nanoclusters (NCs) offer new catalytic hydrogenation possibilities. This research explores their potential for designing highly active and selective catalysts by controlling structure at the atomic level.

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Area of Science:

  • Nanoscience
  • Catalysis
  • Materials Science

Background:

  • Recent advances in nanoscience enable atomic-level control over nanoparticle synthesis in solution.
  • Atomically precise nanoclusters (NCs) are well-defined in composition and structure, allowing tailored functionalities.
  • Metal-hydride NCs show promise for catalytic hydrogenation applications.

Purpose of the Study:

  • To highlight recent work in metal-hydride nanoclusters for catalytic hydrogenation.
  • To explore the broader catalytic opportunities of atomically precise metal nanoclusters.
  • To discuss the potential of NCs for understanding catalytic mechanisms and designing new catalysts.

Main Methods:

  • Review of recent literature on atomically precise nanoclusters.
  • Focus on metal-hydride nanoclusters for hydrogenation.
  • Analysis of structural and compositional precision for catalytic functionality.

Main Results:

  • Atomically precise nanoclusters (NCs) are a new class of materials with significant potential in catalysis.
  • NCs allow for precise construction of active sites, aiding in the understanding of catalytic mechanisms.
  • Tailoring NCs at the atomic level facilitates the design of catalysts with high activity and selectivity.

Conclusions:

  • Atomically precise metal nanoclusters offer exciting opportunities for future catalysis research.
  • The ability to control NCs at the atomic level is key to developing advanced catalytic materials.
  • NCs provide a platform for fundamental studies and practical applications in catalysis.