TY - JOUR
T1 - Effect of microstructure on HER catalytic properties of MoS2 vertically standing nanosheets
AU - Hernandez Ruiz, Karla
AU - Liu, Jiajia
AU - Tu, Rong
AU - Li, Meijuan
AU - Zhang, Song
AU - Vargas Garcia, Jorge Roberto
AU - Mu, Shichun
AU - Li, Haiwen
AU - Goto, Takashi
AU - Zhang, Lianmeng
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China , No. 51372188 , No. 51521001 and the 111 Project ( B13035 ). This research was also supported by the International Science & Technology Cooperation Program of China ( 2014DFA53090 ) and the Natural Science Foundation of Hubei Province, China ( 2016CFA006 ), and the National Key Research and Development Program of China ( 2017YFB0310400 ), and the Fundamental Research Funds for the Central Universities (WUT: 2017II43GX , 2017III032 , 2017YB004 ), and Science Challenge Project (No. TZ2016001 ), and the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (WUT, Grant No: 2017-KF-5 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/5/30
Y1 - 2018/5/30
N2 - MoS2 vertically standing nanosheets were prepared by metal-organic chemical vapor deposition using molybdenum hexacarbonyl (Mo(CO)6) and 1,2-ethanedithiol (C2H6S2) as precursors. The sulfur source was chosen as a less toxic alternative to the well-established hydrogen sulfide (H2S). These films were deposited between 500 and 800 °C resulting in different surface morphologies, from nanoparticles to vertically standing nanosheets. A highly (002) oriented 2H-MoS2 film was obtained at 700 °C. The effect of the microstructure on the catalytic performance of hydrogen evolution reaction (HER) of the MoS2 films was investigated. The Tafel slope varied from 68 to 94 mV/dec, showing that the microstructure of the films had an influence on their final electrochemical performance. Water contact angle analysis was used to study the surface wettability of the films, obtaining values from 60 to 121.2°. These results exhibited a quite consistent trend with the Tafel slope, indicating a significant effect of wettability and nanosheets edge exposure on the HER performance.
AB - MoS2 vertically standing nanosheets were prepared by metal-organic chemical vapor deposition using molybdenum hexacarbonyl (Mo(CO)6) and 1,2-ethanedithiol (C2H6S2) as precursors. The sulfur source was chosen as a less toxic alternative to the well-established hydrogen sulfide (H2S). These films were deposited between 500 and 800 °C resulting in different surface morphologies, from nanoparticles to vertically standing nanosheets. A highly (002) oriented 2H-MoS2 film was obtained at 700 °C. The effect of the microstructure on the catalytic performance of hydrogen evolution reaction (HER) of the MoS2 films was investigated. The Tafel slope varied from 68 to 94 mV/dec, showing that the microstructure of the films had an influence on their final electrochemical performance. Water contact angle analysis was used to study the surface wettability of the films, obtaining values from 60 to 121.2°. These results exhibited a quite consistent trend with the Tafel slope, indicating a significant effect of wettability and nanosheets edge exposure on the HER performance.
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U2 - 10.1016/j.jallcom.2018.02.347
DO - 10.1016/j.jallcom.2018.02.347
M3 - Article
AN - SCOPUS:85042918051
SN - 0925-8388
VL - 747
SP - 100
EP - 108
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -