Controllable CO adsorption determines ethylene and methane productions from CO2 electroreduction

High‐Rate CO2 Electroreduction to C2+ Products over a Copper‐Copper Iodide Catalyst

“…DFT calculations were used to investigate the role of adsorbed iodine on CO adsorption that is a key factor controlling C−C coupling [12, 13] . On Cu(100) surface which adsorbs iodine under CO 2 RR conditions, [14] CO molecule sits on top of Cu and the adsorption energy is −1.09 eV (Figure 4 c).…”

N-modulated Cu+ for efficient electrochemical carbon monoxide reduction to acetate

“…4e, Table S1), indicating that surface N-modulated Cu + active sites remarkably boosted the catalytic activity of Cu. Furthermore, the acetate turnover frequency (TOF) [42] exhibited the same tendency for the N-Cu. The TOF of N-Cu is~0.048 s −1 per total Cu atoms at −1.37 V, approximately twice higher than that for Com-Cu.…”

“…Recently, the electrochemical CO 2 reduction reaction (CO 2 RR) has made remarkable progress in yielding C 1 products (such as carbon monoxide (CO) [4-6] and formate (HCOO − ) [7-9]) with significantly high current densities and high Faradaic efficiencies (FEs). Meanwhile, the overall performance of CO 2 RR to C 2 products of ethylene [10][11][12] and ethanol [13][14][15], has greatly improved on copper (Cu) catalysts. However, acetate (another C 2 product), which is wildly used as a raw chemical material for pharmacy, dyestuff, rubber and so on, has an excessively low partial current density (<1 mA cm −2…”

“…Lots of strategies, including morphological modification [24,25], grain boundary control [26], reaction condition optimization [19], introducing various elements as modulators [14] and modifying the local oxidation state of Cu [10,27], have been taken to enhance the selectivity of C 2 products and the current density. Surface Cu + active sites modulated by non-metal elements have been proved theoretically and experimentally to greatly improve the selectivity of C 2 products [10,12,28]. However, the oxygen-modulated Cu + species, always derived from cuprous oxide (Cu 2 O) and copper oxide (CuO), is extremely unstable and tends to be reduced to Cu 0 species under CO 2 /CORR conditions, leading to decreased catalytic performance [29].…”

Polymer‐Supported Liquid Layer Electrolyzer Enabled Electrochemical CO2 Reduction to CO with High Energy Efficiency

“…The development of cost efficiency CO 2 utilization technologies to reduce CO 2 levels and reconciling carbon‐cycle is of great importance [2] . Electrochemical CO 2 reduction (eCO 2 R) using sustainable energy to formic acid, [3] carbon monoxide (CO), [4] methanol, [5] ethanol, [6] ethylene, [7] etc., could provide a new approach for utilizing the excess CO 2 . CO is a versatile feedstock which can be facilely converted to high‐value oxygenates and hydrocarbons through the Fischer‐Tropsch process [8] .…”