期刊
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
卷 343, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2023.123493
关键词
Dislocated lattice; Hollow penetration electrode; Exclusive formate production; Strain effects
The electroreduction of CO2 to valuable chemicals using renewable energy is a promising strategy for achieving carbon neutrality, but it remains challenging under high industry current densities. In this work, a lattice-dislocated hollow-fiber Bi electrode was developed to address this issue. The electrode showed a nearly perfect formate Faradaic efficiency at a current density of 1 A cm(-2), effectively suppressing CO and hydrogen generation. The results suggest that the lattice-dislocated Bi hollow electrode, which induces penetration and strain effects, plays a crucial role in promoting CO2 conversion.
CO2 electroreduction to valuable chemicals using renewable energy is a prospective strategy for realizing carbon neutrality, however, exclusive production of formate under high industry current densities (> 200 mA cm(-2)) remains challenging. Herein, we presented a lattice-dislocated hollow-fiber Bi via in situ reconstruction to make a breakthrough for such issue. A nearly perfect formate Faradaic efficiency of > 99.5 % was realized with a current density of 1 A cm(-2), completely suppressing CO and hydrogen generation. Finite element simulations showed high-concentration CO2 feeding was realized even though at ampere-level current density. And density functional theory calculations revealed that the abundant dislocated lattice acting as the active sites boosted the production of OCHO* . Thus, the synergistic combination of penetration and strain effects induced by the latticedislocated Bi hollow penetration electrode is responsible for such remarkable activities. This work represents a large step toward the application of direct conversion of CO2.
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