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関連する概念動画

Redox Equilibria: Overview01:23

Redox Equilibria: Overview

A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
Balancing Redox Equations02:58

Balancing Redox Equations

Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

Oxidation–Reduction Reactions

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関連する実験動画

Updated: Jun 15, 2026

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
05:41

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

Published on: February 11, 2016

セリウム酸化物における電気駆動によるリドックスプロセス

Peng Gao1, Zhenchuan Kang, Wangyang Fu

  • 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

Journal of the American Chemical Society
|March 12, 2010
PubMed
まとめ
この要約は機械生成です。

科学者は,電場を使用して室温でセリウム酸化物のリドックス反応を観察しました. この突破は,よりクリーンな排出量と効率的なエネルギーアプリケーションのための低温触媒を可能にすることができます.

さらに関連する動画

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles
09:46

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles

Published on: August 26, 2018

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
10:15

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts

Published on: November 7, 2025

関連する実験動画

Last Updated: Jun 15, 2026

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
05:41

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

Published on: February 11, 2016

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles
09:46

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles

Published on: August 26, 2018

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
10:15

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts

Published on: November 7, 2025

科学分野:

  • 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
  • ナノテクノロジー ナノテクノロジー

背景:

  • セリウム酸化物は三方向触媒に不可欠ですが,それらの還酸化反応は通常,高温 (>600 K) と低酸素部分圧を必要とします.
  • 触媒の性能を改善し,冷却状態での汚染を減らすためには,動作温度を下げる必要があります.

研究 の 目的:

  • 環境温度でのセリウム酸化物のリドックスプロセスを調査し,観察する.
  • これらの反応を低温で誘導する電気場の可能性を調査する.

主な方法:

  • 立体高解像度伝送電子顕微鏡 (HRTEM) を使用した直接的な原子スケール観測.
  • セリウム酸化物における酸化還元反応を誘導し,イメージするために,電場を適用する.

主要な成果:

  • 環境温度でのセリウム酸化物における電気駆動による酸化還元過程の直接的,原子規模の観測を達成した.
  • 酸素空位移動によって引き起こされる再現可能で可逆の相変換が実証されています.
  • 電気駆動による酸化還元反応中のダイナミックな変化を画像化することに成功しました.

結論:

  • この発見により,酸化セリウム触媒の低温操作が可能になった.
  • 潜在的な用途には,自動車の排出物の浄化,酸素生成,および中温固体酸化物燃料電池が含まれます.