近日，课题组硕士生朱秋颖论文“Graphdiyne supported Ag–Cu tandem catalytic scheme for electrocatalytic reduction of CO₂ to C2+ products”被Nanoscale(2022年中科院SCI期刊二区Top期刊，IF=8.307)接收！

Abstract

Electrochemical CO₂ reduction reaction (CO₂RR) to added-value C2+ products is a worthy way to effectively reduce CO₂ levels in atmosphere. Cu nano-materials have been proposed as efficient CO₂RR catalysts for producing C2+ products, however, difficulty in controlling the efficiency and selectivity hinder its application. Herein, we proposed a simple routine to construct a graphdiyne (GDY) supported Ag-Cu nanocluster as C2+ product-selective electrocatalysts and optimized the composition by electrochemical performance screening. The synthesized Ag-Cu nano-clusters are uniformly distributed on the surface of GDY with particle sizes constricted to 3.7 nm due to the strong diyne-Cu interaction. Comparing to Cu/GDY, Ag-Cu/GDY tandem schemes exhibited superior CO₂RR to C2+ performance with Faraday efficiency (FE) up to 55.1% and current density of 48.6 mA cm⁻² which remains stable for more than 33 hours. Theoretical calculations show that the adsorption energy of CO is much higher on the Cu (-1.066 eV) than Ag (-0.615 eV), thus promoting the drift of *CO from Ag to Cu. Moreover, calculations indicate that the key C-C coupling reaction of *CO with *COH is more favored on Ag-Cu/GDY than the original Cu/GDY which contributes to the formation of C2+ product. Our findings shed light on a new strategy of combing GDY supporting with tandem catalytic scheme for developing new CO₂RR catalysts with superior selectivity and activity for C2+ products.

https://pubs.rsc.org/en/content/articlelanding/2023/nr/d2nr05399c