Waste cotton fabric derived porous carbon containing Fe3O4/NiS nanoparticles for electrocatalytic oxygen evolution

• 作者: Shan Jiang Hao Shao Genyang Cao Han Li Weilin Xu Jingliang Li Jian Fang Xungai Wang
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2020,（24）
• 页码范围: 92-99
• 页数: 8页
• 语种: 英文

摘要

Developing low-cost,active and durable electrocatalysts for oxygen evolution reaction (OER) is an urgent task for the applications such as water splitting and rechargeable metal-air battery.Herein,this work reports the fabrication of a metal and hetero atom co-doped fibrous carbon structure derived from cot-ton textile wastes and its use as an efficient OER catalyst.The free-standing fibrous carbon structure,fabricated with a simple two-step carbonization process,has a high specific surface area of 1796 m2/g and a uniform distribution of Fe3O4/NiS nanoparticles (Fe3O4/NiS@CC).The composite exhibits excellent OER performance with an onset potential of 1.44 V and a low overpotential of 310 mV at the current den-sity of 10 mA/cm2 in a 1.0 M KOH solution,which even surpass commercial RuO2 catalyst.Additionally,this ternary catalyst shows remarkable long-term stability without current density loss after continuous operation for 26 h.It can be believed that the outstanding OER performance is attributed to the synergistic effect between the iron oxides and nickel sulphides,as well as the micro-meso porous carbon structure.This study demonstrates a new strategy to use conventional textile materials to prepare highly efficient electrocatalvsts;it also provides a simple approach to turn textile waste into valuable products.