双模板协同合成氮硫铁共掺杂分级多孔碳材料的电催化性能  

Electrocatalytic Properties of N-S-Fe Co-doped Hierarchical Porous Carbon Material Co-Synthesized by Dual-template

作　　者：董雅倩 张耀辉 唐宾[1] DONG Yaqian;ZHANG Yaohui;TANG Bin(Institute of New Carbon Materials,Taiyuan University of Technology,Jinzhong 030600,China;School of Energy and Power Engineering,North University of China,Taiyuan 030024,China)

机构地区：[1]太原理工大学新型碳材料研究院,晋中030600 [2]中北大学能源动力工程学院,太原030024

出　　处：《机械工程材料》2022年第12期18-23,42,共7页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51671140);山西省青年科学基金资助项目(201901D211257)。

摘　　要：通过MgO/ZnCl_(2)双模板协同作用和一步热解的方法制备氮硫铁共掺杂分级多孔碳材料,研究了该材料的氧还原反应电催化性能。结果表明:采用该方法成功合成了具有碳纳米片结构的氮硫铁共掺杂分级多孔碳材料,比表面积较大,为1 140.31 m^(2)·g^(-1);ZnCl_(2)模板促进了微孔的形成,有助于形成致密的活性位点;MgO模板促进了介孔的形成,有利于氧还原反应电催化过程的传质;该材料在碱性电解质中表现出优异的氧还原反应电催化活性、良好的电催化稳定性和持久性以及较快的电子转移速率,氧还原反应的起始电位为1.05 V,半波电位为0.81 V,电荷转移电阻为11Ω·cm^(2),经过13 h极化后保留了原始电流密度的83%;用该材料组装的锌-空气电池的开路电位为1.42 V,最大功率密度为182.1 mW·cm^(-2)。N-S-Fe co-doped hierarchical porous carbon material was prepared by MgO/ZnCl_(2) double template synergy and one-step pyrolysis, and the electrocatalytic performance of oxygen reduction reaction of the material was studied. The results show that the N-S-Fe co-doped hierarchical porous carbon material with carbon nanosheet structure was successfully synthesized, and had large specific surface area of 1 140.31 m^(2)·g^(-1). The ZnCl_(2) template could be conducive to the formation of micropores and dense active sites. The MgO template promoted the formation of mesopore, which could be beneficial to the mass transfer during electrocatalytic process of oxygen reduction reaction. The material exhibited excellent oxygen reduction electrocatalytic activity, good electrocatalytic stability and persistence, and high electron transfer rates in alkaline electrolytes. The onset potential, half-wave potential and charge transfer resistance were 1.05 V, 0.81 V and 11 Ω·cm^(2), respectively. After 13 h of polarization, 83% of the original current density was retained. The zinc-air battery assembled with the material had open circuit potential of 1.42 V and maximum power density of 182.1 mW·cm^(-2).

关 键 词：双模板 分级多孔碳材料 氧还原反应 锌-空气电池 

分 类 号：O614.811[理学—无机化学]