用于甲催化分解的矩阵隔离的Ni-聚合物复合材料的催化设计
Mayya V Kulikova1, Mikhail I Ivantsov1, Anastasia E Sotnikova1
1A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospect 29, 119991 Moscow, Russia.
Polymers
|June 10, 2023
概括
这项研究合成了一种新的碳/复合基材料,用于甲分解. 该材料具有较高的催化活性,可以在没有预激活的情况下产生多壁碳纳米管.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术纳米技术
背景情况:
- 甲的催化分解对于生产和碳材料合成至关重要.
- 开发有效和稳定的甲分解催化剂仍然是一个重大挑战.
- 基于的材料是有前途的催化剂,但往往需要预先激活,并可能遭受停用.
研究的目的:
- 使用矩阵隔离合成一种新的碳/复合基材料.
- 描述材料的物理化学特性和形态学.
- 为了评估其在甲的催化分解中的性能.
主要方法:
- 矩阵隔离合成
- 扫描电子显微镜 (SEM) 的使用
- 传输电子显微镜 (TEM) 的使用
- 在X射线衍射 (XRD) 中.
- 福里埃变换红外光谱学 (FTIR) 技术
- 拉曼光谱法 拉曼光谱法 拉曼光谱法
- 编程降低温度 (TPR-H2) 的方法
- 特定表面积 (SSA) 分析分析
- 在X射线光电子光谱学 (XPS) 中.
主要成果:
- 离子被固定在聚乙烯醇上,在加热时形成多重凝结点.
- 在250°C时形成的与sp2混合的碳原子结合的系统.
- 复合材料具有较高的特定表面积 (20-214 m2/g),并具有具有5-10 nm含量颗粒的分层结构.
- 观察到高催化活性 (0.9-1.4 gH2/gcat/h) 在没有预激活的情况下在750°C时分解甲.
- 金属在材料表面存在,在反应过程中形成了多壁碳纳米管.
结论:
- 合成的C/复合基材料是甲分解的有效催化剂.
- 该材料表现出高活性和稳定性,不需要预先激活.
- 该过程导致有价值的碳纳米材料的形成,特别是多壁碳纳米管.
更多相关视频
相关概念视频
Catalysis
27.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
27.1K
Olefin Metathesis Polymerization: Overview
2.2K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.2K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
7.8K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.8K
Ziegler–Natta Chain-Growth Polymerization: Overview
3.4K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.4K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.4K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.4K


