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関連する概念動画

Radical Oxidation of Allylic and Benzylic Alcohols01:21

Radical Oxidation of Allylic and Benzylic Alcohols

2.2K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
2.2K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

15.6K
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.
15.6K
Microbes and Other Elemental Cycles01:24

Microbes and Other Elemental Cycles

89
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
89
Weak Acid Solutions04:02

Weak Acid Solutions

31.3K
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
31.3K
Corrosion02:49

Corrosion

21.8K
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
21.8K
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

58.8K
Oxidation–Reduction Reactions
58.8K

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関連する実験動画

Updated: May 1, 2026

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

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機能的に安定した酸化マンガンの酸化酸素の進化触媒で,酸性である.

Michael Huynh1, D Kwabena Bediako, Daniel G Nocera

  • 1Department of Chemistry and Chemical Biology, Harvard University , Cambridge, Massachusetts 02138, United States.

Journal of the American Chemical Society
|March 28, 2014
PubMed
まとめ
この要約は機械生成です。

マンガンの酸化物 (MnOx) は,自己治癒による安定した酸素進化反応 (OER) 触媒として作用します. このプロセスは,MnOx再配置によって駆動され,非貴金属触媒が酸性条件下で機能することを可能にします.

さらに関連する動画

Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
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Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate

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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

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関連する実験動画

Last Updated: May 1, 2026

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

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Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
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Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate

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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

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科学分野:

  • 電気化学 電気化学について
  • マテリアルサイエンス 材料科学
  • カタリシス カタリシス カタリシス

背景:

  • 第一列の金属は,費用対効果の高い酸素進化反応 (OER) 触媒の開発に不可欠です.
  • マンガンの酸化物 (MnOx) は,OERの有望な非貴金属触媒候補である.

研究 の 目的:

  • 幅広いpH範囲におけるMnOx電化学を包括的に特徴づけるために.
  • MnOx.のOERメカニズムと自己治癒特性を解明する.
  • 酸性介質を含む安定したMnOx OER触媒の条件を確立する.

主な方法:

  • 酸性,中性,およびアルカリ性pHに対するMnOxの電気化学的特徴.
  • タフェルの傾きと陽子濃度の依存を含む運動分析.
  • MnOxの電解と溶解機構の調査.

主要な成果:

  • MnOxは,再配置による自己治癒により,OER触媒としての機能的安定性を示す.
  • 2つの競合するOERメカニズムが特定されました:PCET (アルカリ) とMn3+) 不均衡 (酸性).
  • 運動分析は,OERとMnOxのpHの間の電解の速度法則が異なっていることを明らかにした.

結論:

  • MnOxの再配置による自己回復は溶解を相殺し,触媒の安定性を確保します.
  • OER運動と堆積運動の相互作用が,MnOx安定領域を定義する.
  • MnOxのような非貴金属酸化物は,自己治癒を活用することで,酸性媒体で安定したOER触媒として動作することができます.