A superior dye adsorbent towards the hydrogen evolution reaction combining active sites and phase-engineering of (1T/2H) MoS2/-MoO3 hybrid heterostructured nanoflowers

被引:88
作者
Manikandan, Arumugam [1 ]
Ilango, P. Robert [1 ]
Chen, Chia-Wei [1 ]
Wang, Yi-Chung [1 ]
Shih, Yu-Chuan [1 ]
Lee, Ling [1 ,3 ]
Wang, Zhiming M. [3 ]
Ko, Hyunhyub [5 ]
Chueh, Yu-Lun [1 ,2 ,4 ]
机构
[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan
[2] Natl Sun Yet Sun Univ, Dept Phys, Kaohsiung 80424, Taiwan
[3] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 611731, Sichuan, Peoples R China
[4] Natl Tsing Hua Univ, Frontier Res Ctr Fundamental & Appl Sci Matters, Hsinchu 30013, Taiwan
[5] Ulsan Natl Inst Sci & Technol, Sch Energy & Chem Engn, Ulsan 44919, South Korea
基金
新加坡国家研究基金会;
关键词
MOS2 ULTRATHIN NANOSHEETS; VISIBLE-LIGHT; LAYER MOS2; EFFICIENT; NANOMATERIALS; PERFORMANCE; ADSORPTION; GRAPHENE; WATER; 1T;
D O I
10.1039/c8ta02496k
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
Here, we demonstrate the successful synthesis of (1T/2H) MoS2/-MoO3 heterostructured nanoflowers at a low temperature of 200 degrees C by a one-step hydrothermal method. By tuning the reaction time under the influence of thiourea and hydrazine hydrate, we established a complete phase-engineered MoS2 with 1T and 2H phases on the surface of -MoO3. Active sites associated with the phase-engineered (1T/2H) MoS2/-MoO3 hybrid nanoflowers enable them to exhibit dual roles as a superior dye adsorbent and an electrocatalyst towards the hydrogen evolution reaction. The 2H-rich (1T/2H) MoS2/-MoO3 hybrid heterostructured nanoflowers prepared at 16 h achieved a high surface area of 37.97 m(2) g(-1), and 97% of the RhB dye with an initial concentration of 47.9 mg L-1 was removed within 10 min through the adsorption process, which is the highest known removal efficiency reported in the literature. As a hydrogen evolution reaction (HER) electrocatalyst in acidic solution, the 1T-rich (1T/2H) MoS2/-MoO3 hybrid heterostructured nanoflowers prepared at 12 h exhibited a highly efficient catalytic activity by achieving a low overpotential of 232 mV at a current density of 10 mA cm(-2), which is comparable to those of previously reported HER catalysts based on MoS2. Moreover, this sample reached a low Tafel slope of 81 mV dec(-1) and was stable when operated for more than 1000 cycles.
引用
收藏
页码:15320 / 15329
页数:10
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