Innovative strategies toward challenges in PV-powered electrochemical CO_(2)reduction

摘要

The solar energy-driven electrochemical CO_(2)reduction to value-added fuels or chemicals is considered as an attractive path to store renewable energy in the form of chemical energy to close the carbon cycle.However,CO_(2)reduction suffers from a number of challenges including slow reaction rates,low selectivity,and low energy conversion efficiency.Recently,innovative strategies have been developed to mitigate this challenges.Especially the development of flow cell reactors with a gas diffusion electrode,ionic liquid electrolytes,and new electrocatalysts have dramatically improved the reaction rates and selectivity to desired products.In this perspective,we highlight the key recent developments and challenges in PVpowered electrochemical CO_(2)reduction and propose effective strategies to improve the reaction kinetics,to minimize the electrical energy losses,and to tune the selectivity of the catalysts for desired products,and then suggest future direction of research and development.