激发
氢原子
光化学
Atom(片上系统)
可见光谱
氢
材料科学
光电子学
化学
物理
计算机科学
有机化学
量子力学
嵌入式系统
烷基
作者
Guanyu Wang,Song Guo,Ping Wang,Zhiming Zhang,Tong‐Bu Lu
标识
DOI:10.1016/j.apcatb.2022.121655
摘要
Water splitting into H2 via artificial photosynthesis represents an appealing strategy for converting solar energy into fuels. However, commonly used photosensitizers are severely limited by precious metal with narrow visible utilization range. Herein, a library of organic photosensitizers was developed by engineering Bodipy with anthryl and aromatic aldehyde (B-1 – B-6) for enhancing intersystem crossing and extending absorption range. Their absorption can cover over 80% visible regions. Impressively, B-3 can absorb λ > 600 nm visible light to efficiently sensitize nickel-catalyst to produce over 150 μL H2. This performance was much higher than that with noble-metal photosensitizer Ru(bpy)32+ (bpy = 2,2′-bipyridine), representing a breakthrough in developing noble-metal-free photocatalytic systems with long-wavelength excitation. Systematical investigations reveal that B-3 with λ > 600 nm light absorption, long-lived triplet state and superior photochemical stability greatly boost H2 evolution. This work opens an avenue to construct efficient and sustainable catalytic systems by developing organic photosensitizers with long-wavelength excitation.
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