催化作用
介孔材料
碳纤维
材料科学
丙烯腈
格式化
兴奋剂
化学工程
化学
有机化学
共聚物
光电子学
复合数
工程类
复合材料
聚合物
作者
Kwangho Park,Kyung Rok Lee,Sunghee Ahn,Canh Van Nguyen,Kwang‐Deog Jung
标识
DOI:10.1016/j.apcatb.2024.123751
摘要
This study explores the fabrication and characterization of mesoporous nitrogen-doped carbon replicas (MNCs) as Ru catalyst supports for CO2 hydrogenation to formate. MNC supports with a cubic Ia3d-like structure were successfully synthesized from a KIT-6 template. The mesoporosity, N content, and N states in the MNCs differed according to the precursor type, which substantially influenced the stability of single-atom Ru catalysts during CO2 conversion. In hydrogenation tests, the Ru/MNC prepared using acrylonitrile precursor (Ru/MNC-A) demonstrated the best stability, whereas the Ru/MNCs prepared using pyrrole and melamine exhibited low activity owing to Ru agglomeration and limited reactant diffusion, respectively. The excellent stability of Ru/MNC-A resulted from Ru migration and rearrangement, as evidenced by near edge X-ray absorption fine structure analyses. Ru/MNC-A and Ru/MNC-A-400 achieved an outstanding turnover number of 69,000 in CO2 hydrogenation over 72 h. Remarkably, the Ru/MNC-A catalyst demonstrated exceptional stability, attaining a TON of 315,840 over 360 h.
科研通智能强力驱动
Strongly Powered by AbleSci AI