摘要
开发高效的析氧反应(OER)电催化剂是实现可持续能源转换和存储技术的必要条件。多孔有机框架(POF)具有孔径可调、比表面积大、易引入杂原子的特性,可为功能纳米材料的合成提供前驱体。采用三聚氰胺单体(Ma)与1,1′-二乙酰二茂铁单体(DaFc)聚合制备了MaFc-POF材料。以廉价易得的二茂铁基多孔有机框架为唯一前驱体,高温煅烧合成了新型铁-氮共掺杂碳催化剂。原始MaFc-POF框架中的铁和氮分布在石墨化碳中,并作为电催化的有效活性位点。此外,得到的铁-氮共掺杂碳催化剂具有高微孔比表面积、多级孔结构,有利于OER过程中的传质扩散和传输。MaFc-POF-700催化剂在碱性溶液中表现出优异的电催化OER活性,在10 mA·cm^(-2)电流密度下过电位仅为247 mV,Tafel斜率为49 mV·dec^(-1)。
The development of efficient oxygen evolution reaction(OER)electrocatalysts is essential for the realization of sustainable energy conversion and storage technologies.Porous organic frameworks(POF)have unique features including adjustable apertures,high surface areas,and easy introduction of diverse heteroatoms,which can render them promising precursors for the synthesis of functional nanomaterials.In this study,the MaFc-POF was facilely prepared via the polycondensation of melamine(Ma)with 1,1'-diacetylferrocene with(DaFc).Novel Fe-N codoped carbon catalysts were synthesized by high temperature calcination using cheap and easily available ferrocene-based POF as the sole precursors.Preincorporated Fe and N in the pristine MaFc-POF were distributed into the graphitized carbons and functioning as effective active sites for electrocatalysis.In addition,the obtained Fe-N co-doped carbon catalysts possessed hierarchical pore structures and high surface areas,being conducive to mass diffusion and transport in OER process.MaFc-POF-700 exhibited favourable electrocatalytic OER activity in alkaline solution,and required ultralow overpotential of 247 mV to achieve 10 mA·cm^(-2),a small Tafel slope of 49 mV·dec^(-1).
作者
陈宇
牛文悦
倪飞
沈舒欣
宋丹丹
王康军
于广莉
CHEN Yu;NIU Wenyue;NI Fei;SHEN Shuxin;SONG Dandan;WANG Kangjun;YU Guangli(School of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China)
出处
《当代化工》
2025年第10期2269-2274,共6页
Contemporary Chemical Industry
基金
国家自然科学基金项目(项目编号:22208224)
辽宁省博士科研启动基金计划项目(项目编号:2022-BS-213)
吉林大学无机合成与制备化学国家重点实验室开放课题项目(项目编号:2023-17)。
关键词
析氧反应
多孔有机框架
前驱体
铁-氮共掺杂碳
Oxygen evolution reaction
Porous organic frameworks
Precursors
Fe-N co-doped carbon
