Nb-促进 Pt/MoOx/TiO2 低温CO2化成甲醇的催化剂
Weiyang Zhang1, Shirun Zhao1, Yuriko Ando1
1Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo, 001-0021, Japan.
Chemistry (Weinheim an der Bergstrasse, Germany)
|November 17, 2025
概括
一种由促进的/氧化物/二氧化 (Pt/MoOx/TiO2) 催化剂在低温下有效地将二氧化碳 (CO2) 转化为甲醇. 这种可持续的催化剂为碳回收和储能应用提供了高性能和稳定性.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 二氧化碳 (CO2) 化成甲醇对于碳回收和能源储存至关重要.
- 二氧化碳的惰性和高激活能对高效的甲醇合成构成重大挑战.
- 开发用于低温二氧化碳转换的催化剂对于可持续的化学过程至关重要.
研究的目的:
- 设计和合成新的Nb促进的Pt/MoOx/TiO2催化剂,以高效地将二氧化碳化成甲醇.
- 研究这些催化剂在温和条件下的催化性能和稳定性.
- 阐明反应机制和催化剂组件的协同效应.
主要方法:
- 一系列Nb促进的Pt/MoOx/TiO2催化剂的合成.
- 在低于200°C的温度下,对二氧化碳化成甲醇的催化性能进行评估.
- 现场和操作的光谱学研究 (例如,X射线光电子光谱学,红外光谱学) 来分析催化剂特性和反应中间体.
- 优化催化剂的长期稳定性测试.
主要成果:
- 在150°C时,Pt(5) /Mo(10) -Nb(1) /TiO2催化剂实现了高甲醇生产率 (3.8 mmol gcat-1 h-1),超过了商业催化剂.
- 催化剂在400小时反应周期内表现出极好的稳定性.
- 光谱学研究表明,Pt位点激活H2,MoOx物种促进中间体的形成,Nb促进甲醇脱氧和稳定.
结论:
- Nb促进的 Pt/MoOx/TiO2 催化剂为高效的低温 CO2 转化为甲醇提供了一个有前途的途径.
- 该研究提供了对Pt,MoOx和Nb在增强催化活性和稳定性方面的协同作用的机制性见解.
- 这项工作有助于合理设计强大的催化剂,以实现可持续的碳利用.
更多相关视频
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
4.1K
08:15Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
Published on: February 7, 2017
11.8K
相关概念视频
02:13Reduction of Alkenes: Catalytic Hydrogenation
13.9K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
13.9K
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
8.9K
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.
8.9K
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.8K
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...
3.8K
02:47Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
20.6K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
20.6K
01:28Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
5.7K
Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...
5.7K
03:08Hydroboration-Oxidation of Alkenes
11.0K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
11.0K