Residual Chlorine Induced Cationic Active Species on a Porous Copper Electrocatalyst for Highly Stable Electrochemical CO₂ Reduction to C₂₊

Abstract

Electrochemical carbon dioxide (CO 2 )r eduction reaction (CO 2 RR) is an attractive approach to deal with the emission of CO 2 and to produce valuable fuels and chemicals in ac arbon-neutral way.M any efforts have been devoted to boost the activity and selectivity of high-value multicarbon products (C 2+ )o nC u-based electrocatalysts.H owever,C ubased CO 2 RR electrocatalysts suffer from poor catalytic stability mainly due to the structural degradation and loss of active species under CO 2 RR condition. To date,most reported Cu-based electrocatalysts present stabilities over dozenso f hours,w hich limits the advance of Cu-based electrocatalysts for CO 2 RR. Herein, ap orous chlorine-doped Cu electrocatalyst exhibits high C 2+ Faradaic efficiency (FE) of 53.8 %at À1.00 Vv ersus reversible hydrogen electrode (V RHE ). Importantly,the catalyst exhibited an outstanding catalytic stability in long-term electrocatalysis over 240 h. Experimental results show that the chlorine-induced stable cationic Cu 0 /Cu + species and the well-preserved structure with abundant active sites are critical to the high FE of C 2+ in the long-term run of electrochemical CO 2 reduction.

Boosting CO2 electroreduction towards C2+ products via CO* intermediate manipulation on copper-based catalysts

“…It was observed that a certain amount of Cu + in the Cl-containing precursor was stable in the CO 2 RR catalysis process. 127,132 Consequently, it showed very specific selectivity to C 2+ . 133 Meanwhile, in the presence of Cl ions, Cu 2 O could still be preserved under the CO 2 RR conditions (Fig.…”

How to Build a Microplastics‐Free Environment: Strategies for Microplastics Degradation and Plastics Recycling

“…As with the mitigation strategies for other persistent pollutants or greenhouse gases, chemical catalytic conversion is the most promising strategy for permanent removal of contaminants, either via elimination or upcycling into valuable products. [114][115][116] The developments of chemical degradation of MPs through AOPs and photocatalytic degradation have given the promising alternatives of traditional technologies for thorough eradication of MPs by converting them into non-toxic matter. Meanwhile, the development of physical-chemical coupling approaches can be promising to further improve MPs removal efficiency by evoking a synergistic effect.…”

Boosting the Electrocatalytic CO2 Reduction Reaction by Nanostructured Metal Materials via Defects Engineering

“…Compared with the pristine copper and oxidized nanocopper catalysts, the B−doped Cu catalysts showed a more superior conversion efficiency, higher C 2 selectivity and stability. Using the same synthetic method, halogene could be used to modify copper catalyst as well [ 73 ].…”

“…Compared with the pristine copper and oxidized nanocopper catalysts, the B−doped Cu catalysts showed a more superior conversion efficiency, higher C 2 selectivity and stability. Using the same synthetic method, halogene could be used to modify copper catalyst as well [73]. The wet chemical reduction method, including the hydrothermal/solvothermal method, is one of the most widely studied synthesis methods.…”