Title

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

Publication Name

Angewandte Chemie - International Edition

Abstract

Electrochemical carbon dioxide (CO ) reduction reaction (CO RR) is an attractive approach to deal with the emission of CO and to produce valuable fuels and chemicals in a carbon-neutral way. Many efforts have been devoted to boost the activity and selectivity of high-value multicarbon products (C ) on Cu-based electrocatalysts. However, Cu-based CO RR electrocatalysts suffer from poor catalytic stability mainly due to the structural degradation and loss of active species under CO RR condition. To date, most reported Cu-based electrocatalysts present stabilities over dozens of hours, which limits the advance of Cu-based electrocatalysts for CO RR. Herein, a porous chlorine-doped Cu electrocatalyst exhibits high C Faradaic efficiency (FE) of 53.8 % at −1.00 V versus reversible hydrogen electrode (V ). 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 /Cu species and the well-preserved structure with abundant active sites are critical to the high FE of C in the long-term run of electrochemical CO reduction. 2 2 2 2+ 2 2 2 2+ RHE 2+ 2 0 +

Open Access Status

This publication is not available as open access

Volume

60

Issue

20

First Page

11487

Last Page

11493

Funding Number

18520750400

Funding Sponsor

National Natural Science Foundation of China

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/anie.202102606