Ultrahigh Density of Atomic CoFe-Electron Synergy in Noncontinuous Carbon Matrix for Highly Efficient Magnetic Wave Adsorption

作     者：Wenhuan Huang Qiang Qiu Xiufang Yang Shouwei Zuo Jianan Bai Huabin Zhang Ke Pei Renchao Che Wenhuan Huang;Qiang Qiu;Xiufang Yang;Shouwei Zuo;Jianan Bai;Huabin Zhang;Ke Pei;Renchao Che

作者机构：Key Laboratory of Chemical Additives for China National Light IndustryCollege of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi’an 710021People’s Republic of China KAUST Catalysis CenterKing Abdullah University of Science and Technology23955-6900 ThuwalKingdom of Saudi Arabia Laboratory of Advanced MaterialsShanghai Key Lab of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2022年第14卷第6期

页      面：192-205页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(22001156) the Youth Talent Fund of University Association for Science and Technology in Shaanxi,China(20210602) King Abdullah University of Science and Technology(KAUST) Open access funding provided by Shanghai Jiao Tong University 

主　　题：Electromagnetic wave-absorbing materials Off-axis electron hologram M-M’interaction Hierarchical porous structure Energetic metal organic framework 

摘      要：Improving the atom utilization of metals and clarifying the M–M’interaction is both greatly significant in assembling high-performance ultra-light electromagnetic wave-absorbing materials.Herein,a high-temperature explosion strategy has been successfully applied to assemble the hierarchical porous carbon sponge with Co–Fe decoration via the pyrolysis of the energetic metal organic framework.The as-constructed hybrid displays a superior reflection loss(RL)value of-57.7 d B and a specific RL value of-192 d B mg-1 mm-1 at 12.08 GHz with a layer thickness of 2.0 mm(loading of 15 wt%).The off-axis electron hologram characterizes the highly distributed numerous polarized nanodomain variable capacitors,demonstrating the dipole and interfacial polarization along the edges of the nanopores.More importantly,the X-ray absorption spectroscopy analysis verifies the mutual interaction between the metal cluster and carbon matrix and the electronic coupling responsible for the greatly improved electromagnetic wave absorption.