Authors: Shoujie Li, Xiao Dong, Jianing Mao, Wei Chen, Aohui Chen, Gangfeng Wu, Chang Zhu, Guihua Li, Yiheng Wei, Xiaohu Liu, Jiangjiang Wang, Yanfang Song, Wei Wei
Published: 2023-05-15
Source: Full article
AbstractElectroreduction of CO2 to CO is a promising route for greenhouse gas resource utilization, but it still suffers from impractical current density and poor durability. Here, a nanosheet shell (NS) vertically standing on the Ag hollow fiber (NS@Ag HF) surface formed by electrochemical surface reconstruction is reported. As‐prepared NS@Ag HF as a gas penetration electrode exhibited a high CO faradaic efficiency of 97% at an ultra‐high current density of 2.0 A cm−2 with a sustained performance for continuous >200 h operation. The experimental and theoretical studies reveal that promoted surface electronic structures of NS@Ag HF by the nanosheets not only suppress the competitive hydrogen evolution reaction but also facilitate the CO2 reduction kinetics. This work provides a feasible strategy for fabricating robust catalysts for highly efficient and stable CO2 reduction.