Porphyrin Coordination Polymer with Dual Photocatalytic Sites for Efficient Carbon Dioxide Reduction

作者：Xu Ding, Baoqiu Yu, Bin Han, Hailong Wang, Tianyu Zheng, Baotong Chen, Jian Wang, Zonghua Yu, Tingting Sun, Xianzhang Fu, Dongdong Qi, Jianzhuang Jiang · 发表于：ACS Applied Materials & Interfaces · 年份：2022 · DOI：10.1021/acsami.1c23941 · 被引用次数：62 · 研究领域：Covalent Organic Framework Applications、Metal-Organic Frameworks: Synthesis and Applications、CO2 Reduction Techniques and Catalysts

The resurgence of visible light photocatalysis for carbon dioxide reduction reaction (CO 2 RR) has resulted in the generation of various homogeneous and heterogeneous paradigms. Herein, a new system has been established by incorporating dual catalytic sites into porous coordination polymer toward the photocatalysis of CO 2 RR. A functional ligand, 5,10,15,20-tetrakis[4′-(terpyridinyl)phenyl]porphyrin (TTPP), has been used to assemble discrete divalent nickel ions into the coordination polymer (TTPP-Ni) through metal bis(terpyridine) nodes. Both the porphyrin and terpyridine moieties prefer to bind with nickel ions, giving rise to TTPP-Ni with dual active catalytic sites. By controlling different molar ratios of ligand and metal and the reaction temperature, four samples including TTPP-Ni- n ( n = 1, 2, 3, and 4) with different molar ratios of nickel porphyrin and nickel bis(terpyridine) subunits have been fabricated. The predesigned two-dimensional chemical structures of TTPP-Ni samples have been fully characterized using powder X-ray diffraction, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and IR and UV–vis spectroscopies. The photocatalytic activities of these coordination polymers have been screened using [Ru(bpy) 3 ]Cl 2 ·6H 2 O as a photosensitizer together with triisopropanolamine as the sacrificial electron donor in CH 3 CN and H 2 O. Among these photocatalysts, TTPP-Ni-3 and TTPP-Ni-4 with almost ...