在机器学习的指导下,发现了用于光催化生产的水稳定金属有机框架
Xiao Niu1,2, Zhiming Zhang2, Xiaoyu Wu2
1State Key Laboratory of Synergistic Chem-Bio Synthesis, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University Shanghai 200240 China yongcui@sjtu.edu.cn.
Chemical science
|February 20, 2026
概括
机器学习加速了用于光催化生产的金属有机框架 (MOF) 的发现. 该战略确定了有希望的,水稳定的MOF,有助于未来对高效气发电的研究.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 催化剂是一种催化剂.
背景情况:
- 金属有机框架 (MOFs) 为光催化 (H2) 生产提供可调节的多孔性和模块化化学.
- 从众多可能性中发现高性能和水稳定的MOF是一个重大挑战.
研究的目的:
- 开发使用机器学习 (ML) 的层次选策略,以加速发现具有增强水稳定性的光催化活性MOF.
- 确定与H2进化活动和MOF中的水稳定性相关的关键结构特征.
主要方法:
- 训练有素的ML分类器在实验H2生产数据上预测光催化性能.
- 从CORE-MOF数据库中使用ML模型选了11660个MOF结构.
- 应用了水稳定性分类器来过入围的MOF.
主要成果:
- 在ML模型中实现了高精度和可转移性,用于预测光催化性能.
- 入围的1731个MOF预计具有光催化活性.
- 确定了419种MOF,它们表现出有前途的光催化活性和水稳定性.
- 发现连接器的灵活性和异形性质对H2进化有积极的影响,而芳香性和刚性则有害.
结论:
- 通过ML指导的层次选策略有效地加速了用于光催化H2生产的有希望的MOF的发现.
- 这种方法提供了一种定量和可解释的方法来识别水稳定的MOF,促进实验验证.
- 这些发现为设计下一代MOF光催化剂提供了路线图,用于可持续的气生产.
相关概念视频
02:50Catalysis
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.
02:45Acid-Catalyzed Hydration of Alkenes
Alkenes react with water in the presence of an acid to form an alcohol. In the absence of acid, hydration of alkenes does not occur at a significant rate, and the acid is not consumed in the reaction. Therefore, alkene hydration is an acid-catalyzed reaction.
02:13Reduction 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 surface of...
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 surface of...
02:17Reduction 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...
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...
01:27Catalysis
Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...