Coupling CO2 reduction with CH3OH oxidation for efficient electrosynthesis of formate on hierarchical bifunctional CuSn alloy

A Pair-Electrosynthesis for Formate at Ultra-Low Voltage Via Coupling of CO2 Reduction and Formaldehyde Oxidation

“…The CO 2 RR//FOR electrolyzer exhibited excellent formate electrosynthesis performance with an average formate FE of 192% in MEA. During the 10-h electrolysis, electricity consumption normalized by the mass of formate produced in CO 2 RR//FOR at 1.0 V was 0.413 Wh g −1 , much higher than that of CO 2 RR//MOR (2.61 Wh g −1 ) [ 40 ]. It is obvious that CO 2 RR//FOR combination demonstrates in MEA itself as a promising alternative for the pair-electrosynthesis of formate (Table S6).…”

Coupling Value‐Added Anodic Reactions with Electrocatalytic CO2 Reduction

“…[30,31,37,[61][62][63][64][65][66][67][68] As mentioned in the Introduction, if an electrocatalyst for selective CO 2 reduction to formate is used in the cathode, the concurrent production of formate can be realized (Figure 3a), eliminating the need for separate downstream purification of products from two sides. [30,31,37,[61][62][63][64][65][66] For example, by using aligned InS nanorods and (oxy)hydroxide@np-Ni 3 P as the cathode and anode catalysts, Zhang et al reached a j total of 50 mA • cm À 2 at a low cell voltage of 2.286 V, with a decrease of 257 mV compared to the conventional system (Figure 3b), indicating the favorable thermodynamics of MOR over OER. [64] Moreover, the differences of cell voltages between them became more pronounced as j total increased (Figure 3c).…”

“…[61] Bifunctional catalysts have also successfully been designed and integrated into the coupled systems, which were able to catalyze both CO 2 RR and MOR. [63,66,68] Li et al reported a type of hierarchically structured CuSn alloy nanowires in situ grown on Cu foam, on which 93.7 % and 96.7 % FE formate were obtained for CO 2 RR and MOR, respectively, at a j total of 125 mA • cm À 2 in a Hcell. [63] Also, a bifunctional catalyst with a well-defined structure is helpful for insights into the relationship between its structure and function.…”

“…[63,66,68] Li et al reported a type of hierarchically structured CuSn alloy nanowires in situ grown on Cu foam, on which 93.7 % and 96.7 % FE formate were obtained for CO 2 RR and MOR, respectively, at a j total of 125 mA • cm À 2 in a Hcell. [63] Also, a bifunctional catalyst with a well-defined structure is helpful for insights into the relationship between its structure and function. Sun et al proposed a crystalline coordination catalyst (PCN-601) composed of Ni-TPP and Ni 8 -TET as active catalytic sites for CO 2 RR and MOR, respectively (Figure 3e).…”

Solar energy-driven electrolysis with molecular catalysts for the reduction of carbon dioxide coupled with the oxidation of 5-hydroxymethylfurfural

“…In this context, the oxidation of alcohols to their corresponding aldehydes, ketones or carboxylic acids would be a nice choice. In 2017, Berlinguette's group demonstrated a novel example of combining the ECO 2 RR with the oxidation of organic alcohols such as 1-phenylethanol, 4 and other works adopting CH 3 OH 3,5 or glycerol 6,7 as the anodic feed were successively reported.…”