材料科学
过电位
碳纳米管
石墨烯
电催化剂
介孔材料
法拉第效率
化学工程
电化学
碳纤维
催化作用
纳米技术
电极
复合数
复合材料
化学
有机化学
工程类
物理化学
作者
Fuping Pan,Boyang Li,Erik Sarnello,Yuhuan Fei,Yang Gang,Xianmei Xiang,Zichen Du,Peng Zhang,Guofeng Wang,Thi Thu Hoai Nguyen,Tao Li,Yun Hang Hu,Hong‐Cai Zhou,Ying Li
出处
期刊:ACS Nano
[American Chemical Society]
日期:2020-04-24
卷期号:14 (5): 5506-5516
被引量:135
标识
DOI:10.1021/acsnano.9b09658
摘要
Atomically dispersed metal and nitrogen co-doped carbon (M-N/C) catalysts hold great promise for electrochemical CO2 conversion. However, there is a lack of cost-effective synthesis approaches to meet the goal of economic mass production of single-atom M-N/C with desirable carbon support architecture for efficient CO2 reduction. Herein, we report facile transformation of commercial carbon nanotube (CNT) into isolated Fe–N4 sites anchored on carbon nanotube and graphene nanoribbon (GNR) networks (Fe-N/CNT@GNR). The oxidization-induced partial unzipping of CNT results in the generation of GNR nanolayers attached to the remaining fibrous CNT frameworks, which reticulates a hierarchically mesoporous complex and thus enables a high electrochemical active surface area and smooth mass transport. The Fe residues originating from CNT growth seeds serve as Fe sources to form isolated Fe–N4 moieties located at the CNT and GNR basal plane and edges with high intrinsic capability of activating CO2 and suppressing hydrogen evolution. The Fe-N/CNT@GNR delivers a stable CO Faradaic efficiency of 96% with a partial current density of 22.6 mA cm–2 at a low overpotential of 650 mV, making it one of the most active M-N/C catalysts reported. This work presents an effective strategy to fabricate advanced atomistic catalysts and highlights the key roles of support architecture in single-atom electrocatalysis.
科研通智能强力驱动
Strongly Powered by AbleSci AI