相关实验视频

Updated: Jun 25, 2025

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

在用于光催化 H₂ 生产的 Ti 基金属有机凝中解辅助催化剂集成方法

Maite Perfecto-Irigaray¹, Garikoitz Beobide^1,2, Oscar Castillo^1,2

¹Department of Organic and Inorganic Chemistry, University of the Basque Country, UPV/EHU, P.O. 644, Bilbao E-48080, Spain. garikoitz.beobide@ehu.eus.

Dalton transactions (Cambridge, England : 2003)

|May 20, 2024

概括

从集群中合成的金属有机凝 (MOG) 显示了光催化进化的潜力. 虽然在现场联合催化剂的添加率更高,但现场修改为高效的生产提供了更好的联合催化剂利用率.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
光催化作用的光催化

背景情况:

金属有机凝 (MOG) 是具有可调节的多孔结构的新兴材料.
基于的MOG对能源应用有兴趣,包括光催化.
有效的进化需要优化的光吸收器和共催化剂.

研究的目的:

从(IV) -oxo集群和二氧化连接器中合成和表征新型MOG.
评估这些MOG的光催化演化反应 (HER) 性能.
为了比较在现场和现场联合催化剂结合对HER效率的影响.

主要方法:

使用(IV) -oxo集群和二碳酸连接器合成MOG.
使用冷传输电子显微镜,气体吸附,X射线吸收细结构 (XAFS) 谱学和分散反射谱学进行了表征.
在模拟太阳光下的光催化HER评估与白金联合催化剂通过in situ光沉积和ex situ兴奋剂.

主要成果:

MOG 呈现出具有低结晶度和链接器空缺的中孔/宏孔结构.
扩散反射光谱测定光带间隙的光吸收.
在现场添加导致较高的HER率 (227 μmolH gMOG−1 h−1) 与现场 (110 μmolH gMOG−1 h−1) 相比.
现场修改导致更细的纳米粒子分布和更有效的联合催化剂利用 (110 mmolH gPt−1 h−1 与45 mmolH gPt−1 h−1).

结论:

合成的MOGs是光催化进化的有希望的吸光剂.
联合催化剂结合的方法显著影响反应速率和效率.
现场修改提供了卓越的联合催化剂利用,这对于成本效益高的生产至关重要.

更多相关视频

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis 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

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

Published on: August 17, 2016

相关概念视频

Catalysis

Catalysis

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.

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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...

Reduction of Alkenes: Catalytic Hydrogenation

Reduction of Alkenes: Catalytic Hydrogenation

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...