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Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.

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関連する実験動画

Updated: May 13, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

オーダーメイドメソポラスコバルト酸化物は,高効率の酸素進化の触媒として使用されています.

Jonathan Rosen1, Gregory S Hutchings, Feng Jiao

  • 1Center for Catalytic Science & Technology, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA.

Journal of the American Chemical Society
|March 2, 2013
PubMed
まとめ
この要約は機械生成です。

太陽光燃料のための地球に豊富に存在する触媒の開発は鍵です. この研究では,表面積が大きい,高孔性のコバルト酸化物触媒が作成され,効率的な太陽光燃料生産のための酸素進化活動を大幅に高めました.

さらに関連する動画

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

関連する実験動画

Last Updated: May 13, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

科学分野:

  • カタリシス カタリシス カタリシス
  • 材料科学 材料科学とは
  • 再生可能エネルギーの再生可能エネルギー

背景:

  • 効率的な酸素進化触媒は,太陽光燃料生産に不可欠です.
  • 大量生産のために,地球に豊富な元素ベースの触媒が求められています.

研究 の 目的:

  • 超高表面積のメソポラスコバルト酸化物触媒を製造する.
  • 地球に豊富に存在する元素を用いて,酸素の進化活動を強化する.

主な方法:

  • メソポラスなCo3O4スピネルにおけるMg置換.
  • Mg-選択的浸出により,多孔性と欠陥が生じます.
  • 可視光および化学システムにおける酸素進化のテスト.

主要な成果:

  • 超高表面積 (最大250 m2/g) を達成する.
  • Spinelの欠陥を持つ高孔性のコバルト酸化物を生成した.
  • 高い酸素進化活性を示し,酸中のCo原子1個あたり約2.2 × 10−3 s−1のTOFを示した.

結論:

  • 新型メソポラスコバルト酸化物触媒は,従来の触媒を大幅に上回ります.
  • この材料は,効率的な太陽光燃料生産のための大きな希望を示しています.
  • 毛細な酸化物の欠陥工学は,触媒の実行可能な戦略です.