Premium
A Core–Shell‐Structured Silver Nanowire/Nitrogen‐Doped Carbon Catalyst for Enhanced and Multifunctional Electrofixation of CO 2
Author(s) -
Yang HengPan,
Zhang HanWen,
Wu Yu,
Fan LiangDong,
Chai XiaoYan,
Zhang QianLing,
Liu JianHong,
He ChuanXin
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201801612
Subject(s) - catalysis , electrochemistry , nanowire , faraday efficiency , materials science , carbon fixation , chemical engineering , electrocatalyst , carbon fibers , inorganic chemistry , nanotechnology , composite number , chemistry , electrode , organic chemistry , carbon dioxide , composite material , engineering
Numerous catalysts have been successfully introduced for CO 2 fixation in aqueous or organic systems. However, a single catalyst showing activity in both solvent types is still rare, to the best of our knowledge. We developed a core–shell‐structured AgNW/NC700 composite using a Ag nanowire (NW) core encapsulated by a N‐doped carbon (NC) shell at 700 °C. Through control experiments and density functional theory calculations, it was confirmed that Ag nanowires acted as the active sites for CO 2 fixation and the uniformly coating of N‐doped carbon created a CO 2 ‐rich environment around the Ag nanowires, which could significantly improve the catalytic activity of Ag nanowires for electrochemical CO 2 fixation. Under mild conditions, up to 96 % faradaic efficiency of CO, 95 % yield of Ibuprofen and 92 % yield of propylene carbonate could be obtained in the electrochemical CO 2 direct reduction, carboxylation and cycloaddition, respectively, using the same AgNWs/NC700 catalyst. These results might provide an alternative strategy for efficient electrochemical fixation of CO 2 .