Amorphous MoS2 confined in nitrogen-doped porous carbon for improved electrocatalytic stability towa

• 作 者: Shaojie Lu Wenjing Wang Shengshuang Yang Wei Chen Zhongbin Zhuang Wenjing Tang Caihong He Jiajing Qian Dekun Ma Yun Yang Shaoming Huang
• 机 构: Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineer
• 出 处: 纳米研究（英文版）
• 发表日期: 2019年12期
• 关键词: MoS2 amorphous N-doped CMK-3 hydrogen evolution reaction (HER) stability

Developing non-precious metal catalysts with high activity and stability for electrochemical hydrogen evolution reaction (HER) is of great significance in both science and technology.In this work,N-doped CMK-3,which was prepared with a casting method using SBA-15 as the hard template and ammonia as the nitrogen source,has been utilized to hold MoS2 and restrict its growth to form MoS2@N-CMK-3 composite.As a result,MoS2 was found to have poorly crystallized and the limited space of porous N-CMK-3 made its size much small.Then there are more active sites in MoS2.Accordingly,MoS2@N-CMK-3 has exhibited good electrocatalytic performance toward HER in acids with a quite small Tafel slope of 32 mY.dec-1.And more importantly,compared to MoS2@CMK-3,its stability has been greatly improved,which can be attributed to the interaction between MoS2 and nitrogen atoms avoiding aggregation and mass loss.This work provides an idea that doping a porous carbon support with nitrogen is an effective way to enhance the stability of the catalyst.