摘要
In this work,we report a novel one-dimensional metal-organic framework(MOF)templated for the synthesis of transition metal sulfides with excellent oxygen evolution reaction(OER)performance via a self-sulfidation process,eliminating the need for additional sulfur sources.After pyrolysis,MOFs containing Co ions as the metal nodes and 1-phenyl-5-mercaptotetrazole(PMTA)as the ligand were transformed to Co_(9)S_(8)nanoparticles,which were encapsulated in a nitrogen and sulfur dual-doped carbon(Co_(9)S_(8)@NSC)matrix.Additionally,PMTA,as a ligand,possesses the unique advantage of forming porous coordination polymers with a wide range of metals(e.g.,Fe,Ni,and Cu),enabling the versatile synthesis of transition metal sulfide electrocatalysts.Consequently,when served as the electrocatalyst for OER,the N,S co-doped Co_(9)S_(8)@NSC porous nanotubes exhibited excellent OER performance with the overpotential of only 248 mV at 10 mA cm^(−2)and long-term stability.These works provide new insights and inspiration for the rational design and development of non-precious metal-based sulfides with practical potential applications.
在这项工作中,我们报道了一种新颖的一维金属有机框架(MOF),其通过自硫化衍生获得具有优异析氧性能(OER)的过渡金属硫化物,而无需额外硫源.热解后,含有Co离子的金属节点和1-苯基-5-巯基四唑(PMTA)作为配体的MOFs转化为N、S共掺杂的Co_(9)S_(8)@NSC一维多孔纳米管.此外,PMTA作为配体还可以与其他过渡金属(如Fe、Ni和Cu)形成金属多孔配位聚合物,这使得利用PMTA制备通用过渡金属硫化物电催化剂的方法成为可能.当N、S共掺杂的Co_(9)S_(8)@NSC多孔纳米管作为OER的电催化剂时,表现出优异的OER性能,在10 mA cm^(-2)电流密度下,其过电势仅为248 mV,并具有良好的长期稳定性.这项工作为合理设计和开发具有实际应用潜力的非贵金属硫化物提供了新的见解和启发.
基金
supported by the National Natural Science Foundation of China(21701059,51902140 and 52102100)
the Natural Science Foundation of Jiangsu Province for Youths(BK20170571).
