関連する実験動画
Updated: Jun 19, 2026

08:44
Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate
Published on: February 23, 2016
ランタニドの溶けた塩の分散は,原子スケールで
Haoyuan Wang1,2, Chunxiao Liu1, Yuan Ji1
1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, People's Republic of China.
Nature materials
|February 19, 2026
まとめ
研究者らは,ランタニド (Ln) 単原子触媒を作るための溶けたニートリート方法を開発しました. このブレークスルーにより,Lnsの原子分散を様々な支柱に可能にし,電気触媒の合成と性能を向上させました.
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:
- ランタニド (Ln) 要素は,電気触媒を調節するためにユニークな電子特性を提供します.
- 現在の合成戦略では,高度に反応性の高いLnsを様々な基板に原子的に分散させるのに苦労しています.
研究 の 目的:
- ランタニド単原子触媒 (Ln-SACs) の一般的な合成戦略を開発する.
- 複数のランタニドの原子分散を様々なサポート材料に可能にするために.
主な方法:
- Ln-SAC合成には新しい溶けたニートリート法が採用されました.
- 形成メカニズムを明らかにするために,体系的な制御実験が行われました.
- 電気触媒性能は,酸性水素の進化に焦点を当てて評価されました.
主要な成果:
- 融解ナイトライト法では,金属,金属酸化物,炭素材料の複数のランタニドの原子分離を成功裏に達成しました.
- ランタニド単原子触媒の形成は,Lux-Flood基本性,質量拡散抵抗,および溶融塩シールドによって制御されます.
- プラチナ (Dy1/Pt) 基のディスプロシウム単原子触媒は,商用Pt/Cと比較して,酸性水素の進化において優れた性能を示した.
結論:
- 溶けたニートリート法では,Ln-SACsを合成するための汎用的なプラットフォームを提供します.
- このアプローチは,Lnsの原子分散を様々な支柱に容易にし,以前の制限を克服します.
- 開発されたLn-SACは,高度な電気触媒応用のための大きな可能性を秘めている.
関連する概念動画
Precipitation Reactions
In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...
Colloids
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
Precipitation of Ions
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
Radioactivity and Nuclear Equations
Nuclear chemistry is the study of reactions that involve changes in nuclear structure. The nucleus of an atom is composed of protons and, except for hydrogen, neutrons. The number of protons in the nucleus is called the atomic number (Z) of the element, and the sum of the number of protons and the number of neutrons is the mass number (A). Atoms with the same atomic number but different mass numbers are isotopes of the same element.
A nuclide of an element has a specific number of protons and...
A nuclide of an element has a specific number of protons and...
Nuclear Stability
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together in the...
To hold positively charged protons together in the...
The Colloidal State
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...

