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Bonding in Metals02:32

Bonding in Metals

52.5K
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”. 
52.5K
Metallic Solids02:37

Metallic Solids

20.8K
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....
20.8K
Alkali Metals03:06

Alkali Metals

24.8K
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
24.8K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

24.4K
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...
24.4K
Properties of Transition Metals02:58

Properties of Transition Metals

29.9K
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.
29.9K
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.8K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.8K

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Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
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メソポール金属イリジウムナノシート

Bo Jiang1, Yanna Guo1, Jeonghun Kim2,3

  • 1International Center for Materials Nanoarchitectonics (WPI-MANA) , National Institute for Materials Science (NIMS) , 1-1 Namiki , Tsukuba , Ibaraki 305-0044 , Japan.

Journal of the American Chemical Society
|August 22, 2018
PubMed
まとめ

研究者らは新しい合成方法を用いて,新しい2Dメソポラスイリジウム (Ir) ナノシートを開発した. これらの先進的な金属ナノマテリアルは,酸素進化反応 (OER) の触媒活性が強化されています.

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Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
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Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

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関連する実験動画

Last Updated: Feb 6, 2026

Preparation of Liquid-exfoliated Transition Metal Dichalcogenide Nanosheets with Controlled Size and Thickness: A State of the Art Protocol
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Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
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科学分野:

  • 材料科学
  • ナノテクノロジー
  • 電気化学

背景:

  • 二次元 (2D) 金属は,ユニークな電子的および熱的性質を持つナノ材料です.
  • 2Dメタルの表面積を増やすことは,材料の利用とアクティブサイトの可用性にとって不可欠です.
  • 2次元金属のメソポールは 性能の向上への道を示しています

研究 の 目的:

  • 2Dメソポラス金属イリジウム (Ir) ナノシートを作るための新しい合成戦略を開発する.
  • これらの新しいナノ構造の 触媒的な応用の可能性を探求する.
  • 酸素進化反応 (OER) の性能を調査する.

主な方法:

  • 2DメソポラスなIrナノシートの合成は,ジブロックコポリマー (ポリエチレン酸化物) -b-ポリステレン,PEO-b-PS) ミセルを使用します.
  • ナノシートの2D平面内のミセルの配列.
  • メソポラス構造と触媒特性について

主要な成果:

  • 前例のない2Dメソポラス金属のIRナノシートを成功裏に合成した.
  • 2D平面に並べたPEO-b-PSミセルの密集したアセンブリを達成しました.
  • 酸性溶液中の酸素進化反応 (OER) のための高い電気触媒活性が実証されている.

結論:

  • この新しい合成経路は,2Dの金属合成とメソポラスアーキテクチャの制御を強化します.
  • その結果生じるメソポラスなIrナノシートは,豊富な触媒活性サイトを提供します.
  • これらの材料は,商用触媒と比較して優れたOER電気触媒活性を示しています.