Lysine‐Functionalized SnO₂for Efficient CO₂Electroreduction into Formate

Abstract

Electroreduction of CO2 to HCOO− can be considered as the most economically valuable process. Herein, we developed lysine‐functionalized SnO2 nanoparticles (SnO2‐lys) as an efficient catalyst for the electroreduction of CO2 into HCOO−. During CO2 electroreduction, SnO2‐lys achieved a Faradaic efficiency for HCOO− of higher than 80% over a wide range of applied potentials from −0.5 V to −2.3 V versus reversible hydrogen electrode (vs. RHE). Notably, the partial current density for HCOO− reached as high as −351.9 mA cm−2 at −2.3 V vs. RHE. On account of kinetic analysis and mechanistic study, lysine‐functionalized SnO2 facilitated faradaic process and accelerated reaction kinetics via enhancing the CO2 activation, thus promoting the catalytic performance of the electroreduction of CO2 into HCOO−.

Application of gas diffusion electrodes in bioeconomy: An update

“…Similar attempts to optimize the overall process can be seen for the electrochemical CO 2 reduction to formic acid/formate, even though the TRL is currently not as high as it is for the eCO 2 RR to CO. Like CO synthesis, the eCO 2 RR to formic acid/formate requires two electrons (Table 1). The most widely used electrocatalysts are tin (Sn) or tin oxide (SnO x ) (Löwe et al, 2021) and modified Sn‐based materials (Lin et al, 2022). Other reported selective catalysts are indium (In) (Bitar et al, 2016; Hegner et al, 2018), amalgams (Park & Shin, 2021) and bismuth‐based materials (García de Arquer et al, 2018; Wang et al, 2021), whereby the latter shows increased catalysts stability toward alkaline catalyst corrosion (Bienen et al, 2021).…”

Improving Hazardous Gas Detection Behavior with Palladium Decorated SnO2 Nanobelts Networks

“…According to Chan et al, the improvement obtained through functionalization by metallic nanoparticles can be understood from different views, such as manipulation of the acid-based properties of the NW surface, change in donor density, catalytic promotion, and extension of the electron depletion region at the junction metal-semiconductor [ 27 ]. SnO 2 NW have already been functionalized with different catalytic nanoparticles such as SiO 2 , palladium, copper, platinum, and lysine to improve the selective detection of other analytes, including acetone, sulfur dioxide, nitrogen dioxide, carbon dioxide, and hydrogen [ 28 , 29 , 30 , 31 , 32 ].…”