Highly efficient ampere-level CO2 reduction to multicarbon products via stepwise hollow-fiber penetration electrodes

Alkaline Ionic Liquid Microphase Promotes Deep Reduction of CO2 on Copper

“…The surface species during CO 2 RR on Cu@AIL were investigated by in situ Raman experiments. As shown in Figure c, there are peaks located at 368, 516, and 1070 cm –1 , which correspond to the Cu–CO stretching vibration, chemisorption of preliminary intermediates (*CO 2 ) on Cu, and adsorbed carbonate (CO 3 2– ) . For the *CO 2 signal, Cu@AIL shows a more obvious peak than Cu (Figure S30) under the same potential.…”

“…). 9 For the *CO 2 signal, Cu@AIL shows a more obvious peak than Cu (Figure S30) under the same potential. This indicates that more CO 2 is adsorbed on the surface of Cu@AIL, which can be ascribed to the interaction between the −NH 2 in AIL and CO 2 .…”

“…Electrocatalytic CO 2 reduction reaction (CO 2 RR) powered by renewable energy sources is a promising route to both reduce greenhouse gas concentration in air and achieve renewable energy storage. − Among the various reduction products obtained from electrocatalytic CO 2 RR, multicarbon (C 2+ ) products are the most popular because of their high energy densities and industrial values. − Up to now, the electrochemical conversion of CO 2 to C 2+ products still presents many challenges, such as higher overpotential and lower product selectivity (especially at ampere-level current densities) than C 1 products. − The limitations are primarily restricted by the high energy barriers of CO 2 activation and CO dimerization. − Therefore, it is crucial to develop efficient electrocatalysts for facilitating CO 2 activation and promoting C–C coupling reaction for C 2+ products.…”