Heterostructured intermetallic CuSn catalysts: high performance towards the electrochemical reduction of CO₂ to formate

Abstract

Electroreduction of carbon dioxide (CO2RR) into fuels and chemicals is an appealing approach to tackle CO2 emission challenges.

The Effect of the Coordination Environment of Atomically Dispersed Fe and N Co‐doped Carbon Nanosheets on CO2 Electroreduction

“…Figure 4a shows the linear sweep voltammetry (LSV) curves of the SA‐Fe/NG‐600 in CO 2 saturated 0.5 M KHCO 3 electrolyte solution (pH=7.2) and Ar saturated 0.5 M KHCO 3 electrolyte solution (pH=8.6). From the LSV curves (Figure 4a), we can clearly observe that the current density obtained in the CO 2 saturated electrolyte solution is significantly increased compared to that of the Ar saturated electrolyte solution, indicating the occurrence of electrocatalytic reduction of CO 2 [38] …”

“…From the LSV curves (Figure 4a), we can clearly observe that the current density obtained in the CO 2 saturated electrolyte solution is significantly increased compared to that of the Ar saturated electrolyte solution, indicating the occurrence of electrocatalytic reduction of CO 2 . [38] The products of electrocatalytic CO 2 reduction are analyzed and detected by gas chromatography (GC). As shown in Figure 4b and Figure S7, the CO 2 RR product of SA-Fe/NG-x (x = 600, 800 and 1000) is composed of CO and by-product H 2 .…”

Derived CuSn Alloys from Heterointerfaces in Bimetallic Oxides Promote the CO2 Electroreduction to Formate

“…[31,32] What's more, CuSn alloy could suppress HER activity more effectively than single metal Cu and Sn derived from the SnO 2 À CuO physical mixture during CO 2 RR, thereby enhancing formate selectivityand catalytic activity. [33] To deeply evaluate the kinetics of formate formation, the Tafel plots of the formate partial currents were investigated and presented in Figure 4a. The SnO 2 /CuO NCs deliver the smallest value of 123.4 mV dec À 1 in comparison to the SnO 2 À CuO physical mixture (163.9 mV dec À 1 ), the SnO 2 (170.7 mV dec À 1 ) and the CuO (197.7 mV dec À 1 ) electrocatalysts, confirming the improved kinetics toward formate due to the generation of more efficient CuSn phase.…”

Low‐Dimensional Metallic Nanomaterials for Advanced Electrocatalysis

“…[170,171] Among the various CO 2 conversion strategies, the electrochemical CO 2 reduction reaction (CO 2 RR) has attracted considerable attention owing to its high conversion efficiencies and mild operating conditions. [172][173][174] Despite these advantages, the high energy barriers coupled with multielectron steps are Reproduced with permission. [46] Copyright 2019, Elsevier.…”

“…[ 170,171 ] Among the various CO 2 conversion strategies, the electrochemical CO 2 reduction reaction (CO 2 RR) has attracted considerable attention owing to its high conversion efficiencies and mild operating conditions. [ 172–174 ] Despite these advantages, the high energy barriers coupled with multielectron steps are major challenges for producing desirable products. [ 175 ] Therefore, the development of highly efficient electrocatalysts for boosting CO 2 RR to yield highly valuable products is imperative.…”