催化作用
碳纤维
过硫酸铵
杂原子
部分
化学工程
热解
水溶液
材料科学
化学
聚合物
聚丙烯酰胺
过渡金属
聚合
无机化学
高分子化学
有机化学
复合材料
工程类
复合数
戒指(化学)
作者
Shufei Zhu,Tao Wu,Mingyue Liao,Jiashen Meng,Yiming Xie,Can‐Zhong Lu
标识
DOI:10.1016/j.cej.2024.149693
摘要
Fe-N-C single-atom catalysts exhibit the highest oxygen reduction reaction catalytic activity among reported transition metal-based SACs. However, the intrinsic activity of atomically dispersed Fe-N4 moieties in carbon limits the ORR catalytic activity of current Fe-N-C. This work describes a simple method for synthesizing single-atom catalysts with atomically dispersed FeN4CxSy active sites, referred to as FeZ-N/S0.6-C. It also developed a radical polymerization approach to encapsulate ZnCl2 and [Fe(Phen)3]3+ within a polyacrylamide matrix. Due to abundant -CO and –NH2 groups in polyacrylamide, the Zn2+ and Fe complexes could be evenly distributed throughout the polymer. Subsequent one-step pyrolysis allowed the generation of nitrogen-sulfur co-doped catalysts with well-defined pore structures and uniform active sites. The introduction of S atoms by ammonium persulfate extended the Fe-N bond of the Fe-N4 moiety, while the ZnCl2 template aided in fine-tuning the channels within the catalyst. As a result, the FeZ-N/S0.6-C catalyst showed a record high half-wave potential (E1/2 = 0.93 V vs. RHE) among the reported non-noble metal catalysts regulated by S elements. Moreover, FeZ-N/S0.6-C-based aqueous Zn-air and quasi-solid Zn-air batteries achieved excellent performance and showed great application potential in energy storage and conversion devices. This work provides a new approach to encapsulate metal ions in polymers and optimize the single-atom catalyst structure by heteroatom doping to enhance the performance for sustainable applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI