In:
Inorganic Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 10, No. 4 ( 2023), p. 1279-1285
Abstract:
Direct photoreduction of CO 2 from flue gas is an energy-saving avenue to realize the carbon-neutral cycle but it is still in its infancy. Herein, we constructed a new anionic metal–organic framework based on trinuclear Ni clusters and thiophenecarboxylic acid for CO 2 photoreduction of exhaust gas from a power plant. Under visible-light irradiation, the yield of CO was 17.4–26.3 mmol g −1 in diluted CO 2 with a concentration of 5–20%. The apparent quantum yield (A.Q.Y.) under a 10% CO 2 atmosphere was determined to be 2.1%, which ranks among the highest values of the reported photocatalysts under similar conditions. Importantly, in real flue gas containing 10% CO 2 , a selectivity of 90.4% was achieved and CO generation reached 18.2 mmol g −1 . In situ transient photovoltage (TPV) and density functional theory (DFT) calculations showed that the formation of a CO 2 bridged photocatalytic interface between Ni-MOF1 and a Ru complex ([Ru(bpy) 3 ]Cl 2 /[Ru(bpy) 2 ]Cl 2 ) was a crucial factor for the efficient CO 2 -to-CO conversion in diluted CO 2 .
Type of Medium:
Online Resource
ISSN:
2052-1553
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2757213-4
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