Co-Doped MoS2 Nanosheets with the Dominant CoMoS Phase Coated on Carbon as an Excellent Electrocatalyst for Hydrogen Evolution

被引:433
作者
Dai, Xiaoping [1 ]
Du, Kangli [1 ,2 ]
Li, Zhanzhao [1 ]
Liu, Mengzhao [1 ]
Ma, Yangde [1 ]
Sun, Hui [1 ]
Zhang, Xin [1 ]
Yang, Ying [1 ]
机构
[1] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
[2] Sichuan Tianyi Sci & Technol Co Ltd, Chengdu 610225, Peoples R China
关键词
MoS2; Co-doping deposition precipitation method; CoMoS phase; hydrogen evolution reaction; MOSSBAUER EMISSION-SPECTROSCOPY; X-RAY PHOTOELECTRON; ACTIVE EDGE SITES; MOLYBDENUM SULFIDE; HYDRODESULFURIZATION CATALYSTS; EFFICIENT ELECTROCATALYST; ULTRATHIN NANOSHEETS; FACILE SYNTHESIS; DISULFIDE; GRAPHENE;
D O I
10.1021/acsami.5b08420
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Highly active and low-cost catalysts for hydrogen evolution reaction (HER) are crucial for the development of efficient water splitting. Molybdenum disulfide (MoS2) nanosheets possess unique physical and chemical properties, which make them promising candidates for HER Herein, we reported a facile, effective, and scalable strategy by a deposition precipitation method to fabricate metal-doped (Fe, Co, Ni) molybdenum sulfide with a few layers on carbon black as noble metal-free electrocatalysts for HER The CoMoS phase after thermal annealing in Co-doped MoS2 plays a crucial role for the enhanced HER The optimized Co-doped MoS2 catalyst shows superior HER performance with a high exchange current density of 0.03 mA.cm(-2), low onset potential of 90 mV, and small Tafel slope of 50 mV.dec(-1), which also exhibits excellent stability of 10000 cycles with negligible loss of the cathodic current. The superior HER activity originates from the synergistically structural and electronic modulations between MoS2 and Co ions, abundant defects in the active edge sites, as well as the good balance between active sites and electronic conductivity. Thanks to their ease of synthesis, low cost, and high activity, the Co-doped MoS2 catalysts appear to be promising HER catalysts for electrochemical water splitting.
引用
收藏
页码:27242 / 27253
页数:12
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