Highly Efficient Electroreduction of CO2 to C2+ Alcohols on Heterogeneous Dual Active Sites.
Electroreduction of CO2 to liquid fuels such as ethanol and n-propanol, powered by renewable electricity, offers a promising strategy for controlling the global carbon balance and addressing the need for the storage of intermittent renewable energy. In this work, we discovered that the composite composed of nitrogen-doped graphene quantum dots (NGQ) on CuO-derived Cu nanorods (NGQ/Cu-nr) was an outstanding electrocatalyst for the reduction of CO2 to ethanol and n-propanol. The Faradaic efficiency (FE) of C2+ alcohols could reach 52.4 % with a total current density of 282.1 mA cm-2 . This is the highest FE for C2+ alcohols with a commercial current density to date. Control experiments and DFT studies show that the NGQ/Cu-nr could provide dual catalytic active sites and could stabilize the CH2 CHO intermediate to enhance the FE of alcohols significantly through further carbon protonation. The NGQ and Cu-nr had excellent synergistic effects for accelerating the reduction of CO2 to alcohols.
['Chen|Chunjun|C|', 'Yan|Xupeng|X|', 'Liu|Shoujie|S|', 'Wu|Yahui|Y|', 'Wan|Qiang|Q|', 'Sun|Xiaofu|X|', 'Zhu|Qinggong|Q|', 'Liu|Huizhen|H|', 'Ma|Jun|J|', 'Zheng|Lirong|L|', 'Wu|Haihong|H|', 'Han|Buxing|B|http://orcid.org/0000-0003-0440-809X']
alcohols dual active sites carbon dioxide electrocatalysis green chemistry