《Highly Efficient and Selective Visible-Light Driven CO2 Reduction by Two Co-Based Catalysts in Aqueous Solution》 was written by Zhang, Liyan; Li, Shiwei; Liu, Huiping; Cheng, Yuan-Sheng; Wei, Xian-Wen; Chai, Xiaomin; Yuan, Guozan. Category: pyridine-derivativesThis research focused onVisible Light driven CO2 reduction cobalt catalyst aqueous solution; crystal structure cobalt dipicolylamine complex; Fluorescence lifetime ruthenium phenanthroline cobalt complex catalyst. The article conveys some information:
Photocatalytic CO2 reduction has been considered as a promising approach to solve energy and environmental problems. Nevertheless, developing inexpensive photocatalysts with high efficiency and selectivity remains a big challenge. In this study, two Co-based complexes [Co2(L1)Cl2] I (1-Co) and [Co(L2)Cl] II (2-Co) were synthesized by treating two DPA-based (DPA: dipicolylamine) ligands with Co2+, resp. Under visible-light irradiation, the performance of 1-Co as a homogeneous photocatalyst for CO2 reduction in aqueous media has been explored by using [Ru(phen)3]2+ as a photosensitizer, and triethylolamine (TEOA) as a sacrificial reductant. 1-Co shows high photocatalytic activity for CO2-to-CO conversion, corresponding to the high TONCO of 2600 and TOFCO of 260 h-1 (TONCO = turnover number for CO; TOFCO = turnover frequency for CO). High selectivity of 97% for CO formation is also achieved. The control experiments catalyzed by 2-Co demonstrated that two Co(II) centers in 1-Co may operate independently and activate one CO2 mol. each. Furthermore, the proposed mechanism of 1-Co for photocatalytic CO2 reduction has been investigated via electrochem. anal., a series of quenching experiments, and d. functional theory calculations In aqueous solution, two Co-based complexes display high photocatalytic activity, selectivity, and durability for CO2-to-CO conversion. The photocatalytic mechanism of 1-Co has been investigated in detail. In the experiment, the researchers used many compounds, for example, Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0Category: pyridine-derivatives)
Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0) is a secondary amine with two picolyl substituents. The compound is a tridentate ligand in coordination chemistry and commonly used to produce Zn-based chemosensors/probes, such as Zinpry.Category: pyridine-derivatives