Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 59, Issue 7, Pages 3008-3015Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b06464
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Funding
- National Natural Science Foundation of China [U1707603, 21625101, 21878008, 21922801, 20190816, 21521005, 21601195]
- Beijing Natural Science Foundation [2182047, 2202036]
- Fundamental Research Funds for the Central Universities [XK1802-6, XK1902, XK1803-05, 12060093063, 2312018RC07]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2019214]
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Reduction of photocatalytic CO2 into renewable hydrocarbon solar fuels is considered to be a promising strategy that can simultaneously address global energy needs as well as environmental concerns. To date, making use of a higher wavelength for photocatalytic conversion of CO2 to CH4 continues to be highly challenging. In this work, we report a highly selective reduction of CO2 into CH4 and CO by introducing Ni species into CoFe-layered double hydroxide (LDH) as the visible light photocatalyst in conjunction with a Ru complex sensitizer. A more interesting finding is that the selectivity of CH4 was raised to 78.9% as compared to 0% of CoFe-LDH, while the H-2 evolution was suppressed to 1.7% as compared to 30.5% of CoFe-LDH under light irradiation at lambda > 500 nm. The involvement of Ni2+ ions in the CoFe-LDH layers has shown to promote the photoinduced electron-hole pair separation and thereby facilitate the photocatalytic efficiency. This work provides a new strategy for exploring the Ni-based earth-abundant photocatalysts for CO2 photoreduction.
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