Enviroment

Chemists developed Nanographene − Rhenium leaf that convert CO2 (Carbon dioxide) into fuel

Carbon dioxide (chemical formula CO2) is a colorless and odorless gas that composed of one carbon and two oxygen atoms. this gas is the main factor of climate change and earth warming. Carbon dioxide exists in Earth's atmosphere as a trace gas and derived from natural and man-made sources including volcanic, the burning of organic matter, and the respiration of aerobic organisms, burning of various fossil fuels for power generation and transport use.

Improving energy efficiency of electrocatalytic and photocatalytic CO2 conversion to useful chemicals poses a significant scientific challenge. We report on using a colloidal nanographene to form a molecular complex with a metal ion to tackle this challenge. In this work, a well-defined nanographene–Re complex was synthesized, in which electron delocalization over the nanographene and the metal ion significantly decreases the electrical potential needed to drive the chemical reduction. We show the complex can selectively electrocatalyze CO2 reduction to CO in tetrahydrofuran at −0.48 V vs NHE, the least negative potential reported for a molecular catalyst. In addition, the complex can absorb a significant spectrum of visible light to photocatalyze the chemical transformation without the need for a photosensitizer.

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Source: ACS publication


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Friday 10 March 2017