Stabilized Cu⁰ -Cu¹⁺ dual sites in a cyanamide framework for selective CO₂ electroreduction to ethylene.

ABSTRACT: Electrochemical reduction of carbon dioxide to produce high-value ethylene is often limited by poor selectivity and yield of multi-carbon products. To address this, we propose a cyanamide-coordinated isolated copper framework with both metallic copper (Cu⁰) and charged copper (Cu¹⁺) sites as an efficient electrocatalyst for the reduction of carbon dioxide to ethylene. Our operando electrochemical characterizations and theoretical calculations reveal that copper atoms in the Cu^δ+NCN complex enhance carbon dioxide activation by improving surface carbon monoxide adsorption, while delocalized electrons around copper sites facilitate carbon-carbon coupling by reducing the Gibbs free energy for *CHC formation. This leads to high selectivity for ethylene productio

SUBMITTER: Yue K 

PROVIDER: S-EPMC11379946 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature