コヴァレント有機枠組における酸化水素アニオン輸送
Shanshan Tao1, Hong Xu2, Qing Xu1
1Department of Chemistry, Faculty of Science, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Journal of the American Chemical Society
|June 10, 2021
まとめ
アルカリ燃料電池の効率的な水酸化アンイオン輸送を可能にする. この画期的な発見により 伝導性が著しく向上し 精巧なエネルギー変換材料の 開発に先駆けとなりました
科学分野:
- 材料科学
- 電気化学
- ナノテクノロジー
背景:
- 酸化水素アニオンの輸送はアルカリ燃料電池にとって不可欠ですが,低伝導性によって制限されています.
- コヴァレント有機フレームワーク (COF) は,イオン輸送を容易にするようにオーダーされたチャネルを提供します.
研究 の 目的:
- 酸化水素アニオン輸送の強化のためのアニオンCOFの設計と合成.
- これらの新しいフレームワークで水酸化イオン輸送のメカニズムを調査する.
主な方法:
- イミダゾリウム機能化された孔壁を持つアニオンCOFの設計合成.
- 導電性測定を用いたイオン輸送特性の特徴づけ
- 阻力スペクトロスコーピーとデュテラートサンプルを含むメカニズム研究.
主要な成果:
- 80 °Cで1.53 × 10−2 S cm−1の例外的な水酸化イオン伝導性を達成した.
- 導電性は既存の材料より 2~6度高いことが示されています
- 陽子交換のジャンプを 輸送メカニズムとして特定した
結論:
- エンジニアリングされたインターフェースを持つアニオンCOFは,ヒドロキシードアニオン輸送を効果的に促進することができます.
- これらの材料はアルカリ燃料電池の性能を向上させる 大きな希望を示しています
- 設計戦略は,エネルギーアプリケーションのための枠組み材料の開発のための新しい道を開きます.
さらに関連する動画
08:12Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
16.3K
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.2K
関連する概念動画
01:17Pore Transport and Ion-Pair Transport
832
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
832
02:54Lewis Structures of Molecular Compounds and Polyatomic Ions
40.6K
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
40.6K
01:08Covalent Bonds
9.4K
Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
9.4K
01:29Covalent Bonds
154.4K
Overview
154.4K
02:58Crystal Field Theory - Octahedral Complexes
28.6K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.6K
03:13Intermolecular Forces
65.2K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
65.2K