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Highly Efficient Photoreduction of Low‐Concentration CO 2 to Syngas by Using a Polyoxometalates/Ru II Composite
Author(s) -
Xu Hui,
You Siqi,
Lang Zhongling,
Sun Yue,
Sun Chunyi,
Zhou Jie,
Wang Xinlong,
Kang Zhenhui,
Su Zhongmin
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201905155
Subject(s) - syngas , yield (engineering) , composite number , absorption (acoustics) , ultrashort pulse , chemistry , materials science , chemical engineering , photochemistry , catalysis , organic chemistry , composite material , optics , laser , physics , engineering
At present, the fixation of CO 2 always requires it to be extracted from the atmosphere first, which leads to more energy consumption. Thus, direct photoreduction of low‐concentration CO 2 to useful chemicals (e.g., syngas) under sunlight is significant from an energy‐saving and environmentally friendly perspective. Here, the design and fabrication of a [Ru(bpy) 3 ]/[Co 20 Mo 16 P 24 ] composite is demonstrated for visible‐light‐driven syngas production from diluted CO 2 (3–20 %) gas with a high yield of approximately 1000 TONs (turnover number of syngas). This activity is an order of magnitude higher than the reported system with [Ru(bpy) 3 ] 2+ participation. With evidence from ultrafast transient absorption, GC‐MS, 1 H NMR spectroscopy and in situ transient photovoltage tests, a clear and fundamental understanding of the highly efficient photoreduction of CO 2 by the [Ru(bpy) 3 ]/[Co 20 Mo 16 P 24 ] composite is achieved. Making use of the structure and property designable polyoxometalates towards the photo‐fixation of CO 2 is a conceptually distinct and commercially interesting strategy for making useful chemicals and environmental protection.