We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Ultrafine Fe<sub>2</sub>C Iron Carbide Nanoclusters Trapped in Topological Carbon Defects for Efficient Electroreduction of Carbon Dioxide.
- Authors
Su, Jianwei; Pan, Dianhui; Dong, Yan; Zhang, Yangyuan; Tang, Yulong; Sun, Jian; Zhang, Linjuan; Tian, Ziqi; Chen, Liang
- Abstract
Normally, the CO2 reduction reaction (CO2RR) on Fe‐based materials is unfavorable due to the poisoning of reaction sites by CO products. By modulating the electronic structures of Fe sites via carbonization, the CO binding strength can be optimized to facilitate the CO2RR. In the present study, a dual N‐elimination strategy is adopted to synthesize and stabilize a rarely reported iron carbide phase Fe2C nanoclusters with a mean diameter of 1.07 nm trapped in topological carbon defects. Notably, the ultrafine Fe2C clusters present an excellent performance on electrocatalytic CO2RR, which can drive a current density of 8.53 mA cm−2 with Faradaic efficiency of 97.1% for CO production at −0.7 V versus reversible hydrogen electrode. Density functional theory calculations reveal that the nanometric Fe2C cluster possesses much weaker binding with CO than the Fe crystalline surfaces and other iron carbides, thus promoting the CO desorption and overall CO2RR process.
- Subjects
CEMENTITE; CARBON dioxide; ELECTROLYTIC reduction; STANDARD hydrogen electrode; DENSITY functional theory
- Publication
Advanced Energy Materials, 2023, Vol 13, Issue 20, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202204391