{"title":"在电荷密度调节金属有机框架催化下将 CO2 光还原为完全 CO","authors":"Luyao Wang, Yifan Gu, Fengting Li","doi":"10.1016/j.checat.2024.101154","DOIUrl":null,"url":null,"abstract":"Photoreduction of CO<sub>2</sub> to a single gas product requires catalysts with remarkable product selectivity because CO and CH<sub>4</sub> are usually produced simultaneously. We propose that the charge-density regulation within metal-organic frameworks (MOFs) could effectively manage the binding energy required for reduction intermediates, thereby controlling the ultimate product formation to obtain CO with 100% selectivity. Herein, two iso-structured Fe-based MOFs bearing linkers with different electronic properties were prepared and exhibited favorable CO<sub>2</sub> photoreduction performance without any cocatalyst or photosensitizer. In particular, the linker was altered to reduce the transfer of charges from Fe to the surrounding ligands, regulating the charge-density distribution. The binding affinity with the key COH∗ was remarkably weakened and behaved thermodynamically unfavorably compared with CO desorption, resulting in 100% CO generation. These insights provide a catalyst design strategy for controlling reduction species and improving product selectivity, which could encourage the development of intriguing MOF material customization for photocatalysis.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"1 1","pages":""},"PeriodicalIF":11.5000,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Photoreduction of CO2 to complete CO catalyzed by charge-density-regulating metal-organic frameworks\",\"authors\":\"Luyao Wang, Yifan Gu, Fengting Li\",\"doi\":\"10.1016/j.checat.2024.101154\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Photoreduction of CO<sub>2</sub> to a single gas product requires catalysts with remarkable product selectivity because CO and CH<sub>4</sub> are usually produced simultaneously. We propose that the charge-density regulation within metal-organic frameworks (MOFs) could effectively manage the binding energy required for reduction intermediates, thereby controlling the ultimate product formation to obtain CO with 100% selectivity. Herein, two iso-structured Fe-based MOFs bearing linkers with different electronic properties were prepared and exhibited favorable CO<sub>2</sub> photoreduction performance without any cocatalyst or photosensitizer. In particular, the linker was altered to reduce the transfer of charges from Fe to the surrounding ligands, regulating the charge-density distribution. The binding affinity with the key COH∗ was remarkably weakened and behaved thermodynamically unfavorably compared with CO desorption, resulting in 100% CO generation. These insights provide a catalyst design strategy for controlling reduction species and improving product selectivity, which could encourage the development of intriguing MOF material customization for photocatalysis.\",\"PeriodicalId\":53121,\"journal\":{\"name\":\"Chem Catalysis\",\"volume\":\"1 1\",\"pages\":\"\"},\"PeriodicalIF\":11.5000,\"publicationDate\":\"2024-10-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chem Catalysis\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1016/j.checat.2024.101154\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chem Catalysis","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.checat.2024.101154","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
摘要
将 CO2 光还原成单一气体产物需要催化剂具有显著的产物选择性,因为 CO 和 CH4 通常是同时产生的。我们提出,金属有机框架(MOFs)内的电荷密度调节可有效管理还原中间产物所需的结合能,从而控制最终产物的形成,以 100% 的选择性获得 CO。本文制备了两种具有不同电子特性连接体的等结构铁基 MOFs,它们在不使用任何共催化剂或光敏剂的情况下表现出良好的 CO2 光还原性能。特别是,连接体的改变减少了电荷从 Fe 向周围配体的转移,从而调节了电荷的密度分布。与关键 COH∗ 的结合亲和力明显减弱,与 CO 解吸相比,热力学行为不利,导致 100% CO 生成。这些见解为控制还原物种和提高产物选择性提供了催化剂设计策略,有助于开发用于光催化的定制化 MOF 材料。
Photoreduction of CO2 to complete CO catalyzed by charge-density-regulating metal-organic frameworks
Photoreduction of CO2 to a single gas product requires catalysts with remarkable product selectivity because CO and CH4 are usually produced simultaneously. We propose that the charge-density regulation within metal-organic frameworks (MOFs) could effectively manage the binding energy required for reduction intermediates, thereby controlling the ultimate product formation to obtain CO with 100% selectivity. Herein, two iso-structured Fe-based MOFs bearing linkers with different electronic properties were prepared and exhibited favorable CO2 photoreduction performance without any cocatalyst or photosensitizer. In particular, the linker was altered to reduce the transfer of charges from Fe to the surrounding ligands, regulating the charge-density distribution. The binding affinity with the key COH∗ was remarkably weakened and behaved thermodynamically unfavorably compared with CO desorption, resulting in 100% CO generation. These insights provide a catalyst design strategy for controlling reduction species and improving product selectivity, which could encourage the development of intriguing MOF material customization for photocatalysis.
期刊介绍:
Chem Catalysis is a monthly journal that publishes innovative research on fundamental and applied catalysis, providing a platform for researchers across chemistry, chemical engineering, and related fields. It serves as a premier resource for scientists and engineers in academia and industry, covering heterogeneous, homogeneous, and biocatalysis. Emphasizing transformative methods and technologies, the journal aims to advance understanding, introduce novel catalysts, and connect fundamental insights to real-world applications for societal benefit.