Amorphous MoS2 confined in nitrogen-doped porous carbon for improved electrocatalytic stability toward hydrogen evolution reaction
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 mV·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.
Tsinghua University Press
Shaojie Lu,Wenjing Wang,Shengshuang Yang,Wei Chen,Zhongbin Zhuang,Wenjing Tang,Caihong He,Jiajing Qian,Dekun Ma,Yun Yang,Shaoming Huang, Amorphous MoS2 confined in nitrogen-doped porous carbon for improved electrocatalytic stability toward hydrogen evolution reaction. NanoRes.2019, 12(12): 3116–3122