1T@2H-MoSe2 nanosheets directly arrayed on Ti plate: An efficient electrocatalytic electrode for hydrogen evolution reaction

被引:61
作者
Zhang, Jingtong [1 ]
Chen, Yalan [1 ]
Liu, Ming [1 ]
Du, Kun [1 ]
Zhou, Yan [1 ,2 ]
Li, Yanpeng [1 ]
Wang, Zhaojie [2 ]
Zhang, Jun [1 ]
机构
[1] China Univ Petr East China, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China
[2] China Univ Petr East China, Coll Sci, Qingdao 266580, Peoples R China
基金
中国国家自然科学基金;
关键词
nanosheets; electrocatalyst; Ti plate; hydrogen evolution; REDUCED GRAPHENE OXIDE; TRANSITION-METAL DICHALCOGENIDES; ACTIVE EDGE SITES; CATALYTIC-ACTIVITY; ULTRATHIN NANOSHEETS; MOLYBDENUM-DISULFIDE; BIFUNCTIONAL ELECTROCATALYST; PHASE-TRANSITION; NICKEL PHOSPHIDE; CARBON PAPER;
D O I
10.1007/s12274-018-2040-x
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Few-layered MoSe2 nanosheets with mixed 1T/2H phase were successfully arrayed on a Ti substrate (forming 1T@2H-MoSe2/Ti) through a facile one-step solvothermal process. After testing different synthesis conditions, it was found that the optimal process involves a temperature of 200 degrees C and a reaction time of 12 h. Structural characterizations reveal that the morphology of 1T@2H-MoSe2 consists of edge-terminated nanosheets with one to five layers, composed of a mixed 1T/2H phase dominated by the 1T one. The 1T@2H-MoSe2/Ti electrode shows excellent HER catalytic activity, with a small onset potential (-120 mV vs. reversible hydrogen electrode, RHE) and an electrode potential of only -133 mV (vs. RHE) to achieve a current density of 20 mA.cm(-2). This excellent electrocatalytic activity is due to the synergistic effects of 1T metallic phase, few-layered nanosheet morphology, and direct growth of 1T@2H-MoSe2 on the Ti substrate. In addition, the 1T@2H-MoSe2/Ti electrode shows excellent stability towards long-term electrolysis. This is due to the long-term stability of the valence states of Mo and Se, as shown by post-electrolysis X-ray photoelectron spectroscopy analysis.
引用
收藏
页码:4587 / 4598
页数:12
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