Low full-cell voltage driven high-current-density selective paired formate electrosynthesis

Abstract

Anodic selective electro‐oxidation of methanol paring with cathodic carbon dioxide (CO2) reduction is regarded as a promising strategy to generate value added formate product. We firstly design a 3D‐assembled NiCo...

The Critical Role of Initial/Operando Oxygen Loading in General Bismuth-Based Catalysts for Electroreduction of Carbon Dioxide

“…The corresponding chronopotentiometry curves were shown in Figure S20. The comparison of total FEs and current densities between this study and other coupled electrolysis systems is shown in Figure d, demonstrating the obvious advantages of the paired electrolysis system developed in this work. − …”

Coupling Value‐Added Anodic Reactions with Electrocatalytic CO2 Reduction

“…Methanol oxidation reaction (MOR) to generate formate is the simplest and most reported alcohol oxidation reaction to couple with CO 2 RR. The recent developments are summarized in Table 1 [30,31,37,61–68] …”

“…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 [30,31,37,61–66] . For example, by using aligned InS nanorods and (oxy)hydroxide@np‐Ni 3 P as the cathode and anode catalysts, Zhang et al.…”

“…Xiao et al. performed the coupled system using a BiPO 4 ‐derived catalyst for CO 2 RR and a S‐NiCo‐LDH catalyst for MOR in flow cells, where only 2.1 V was needed to deliver a high j total of 100 mA ⋅ cm −2 and an excellent 100 % FE formate was achieved [61] …”

“…[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).…”