Electro-derived Cu-Cu2O nanocluster from LDH for stable and selective C2 hydrocarbons production from CO2 electrochemical reduction

Abstract

Recently, CO 2 conversion by electrochemical tool into value-added chemicals has been considered as one of the most promising strategies to offer sustainable development in energy and environment. In this contribution, we investigated electro-derived composites from Cu-based layered double hydroxide (LDH) for CO 2 electrochemical reduction. The Cu-Cu 2 O based nanocomposite (HPR-LDH) were derived by using electro-strategy from LDH having the stability up to 20 h and selectivity toward C 2 H 4 with faraday efficiency up to 36% by significantly suppressing CH 4 and H 2 with respect to bulk Cu foil. A highly negative reduction potential derived catalyst (HPR-LDH) maintained long-term stability for the selective production of ethylene over methane, and a small amount of Cu 2 O was still observed on the catalyst surface after CO 2 reduction reaction (CO 2 RR). Moreover, such unique strategy for electro-derived composite from LDH having small nanoparticles stacked each other grown on layered structure, would provide new insight to improve durability of O Cu combination catalysts for C C coupling products during electrochemical CO 2 conversion by suppressing HER. The XRD, SEM, ESR, and XPS analyses confirmed that the long-term ethylene selectivity of HPR-LDH is due to the presence of subsurface oxygen. The designed composite catalyst significantly enhances the stability and selectivity, and also decreases the over potential for CO 2 electro-reduction. We predict that the new designed LDH 2D-derived composites may attract new insight for transition metal and may open up a new direction for known structural properties of selective catalyst synthesis regarding effective CO 2 reduction reaction. A new type of electro-catalysts derived from layer double hydroxides for CO 2 electrochemical reduction into C 2 hydrocarbon was developed, which exhibited outstanding CO 2 electrochemical reduction capacity, high faradic efficiency products selectivity and excellent production stability.