Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4757644 | Journal of CO2 Utilization | 2017 | 7 Pages |
Abstract
The daunting challenge in electrochemical conversion of CO2 into carbon resource is to explore high-activity and high-selectivity electrocatalysts for CO2 reduction reaction (CO2RR). Here, we report a water-bath route for tunable synthesis of a set of CuO nanostructures including nanowires (NWs), microsphere and nanoflake. The CuO NWs show a unique one-dimensional (1D) structure constructed by nanoparticles building block and manifest a significantly enhanced electrochemical surface area compared with the counterparts and the bulk CuO. Systematic electrochemical studies demonstrate the CuO NWs, as electrocatalyst of CO2RR, manifests a highly electrocatalytic activity, as demonstrated by reaching a current dentistry of 2Â mAÂ cmâ2 at a relative low onset potential and delivering a catalytic current density of up to 100Â mAÂ cmâ2 at â1.6Â V. The nanoparticles assembled 1D structure provides a large amount of edge active sites and thus contributes to such a high electrocatalytic activity. Besides a small quantity of HCOOH, the major products of CO2RR are H2, CO, with tunable ratio of H2/CO in the range of 1.75:1 to 2.75:1 depending on the applied potential; such H2/CO mixture product are potentially used for the syngas that are key feedstocks to produce a variety of liquid fuels in industry.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Peng Huang, Suqin Ci, Genxiang Wang, Jingchun Jia, Jiangwei Xu, Zhenhai Wen,