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Electronic Supplementary Material

Molybdenum sulfide/graphene-carbon nanotube nanocomposite material for electrocatalytic applicationsin hydrogen evolution reactions

Majid Khan1,2,§ (), Ammar Bin Yousaf3,§, Mingming Chen1, Chengsha Wei1, Xibo Wu1, Ningdong Huang1,

Zemin Qi1 (), and Liangbin Li1

1 National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter

Chemistry, University of Science and Technology of China, Hefei 230029, China 2 Department of Computer Science and IT, Sarhad University of Science and Information Technology, Peshawar 25000, Pakistan 3 Hefei National Laboratory for Physical Sciences at Microscale, School of Chemistry and Materials Science, University of Science and

Technology of China, Hefei 230026, China § These authors contributed equally to this work.

Supporting information to DOI 10.1007/s12274-015-0963-z

Figure S1 FESEM images of (a) GO and (b) COOH-functionalized MWCNTs.

Address correspondence to Majid Khan, majid@mail.ustc.edu.cn, majids@hotmail.com; Zeming Qi, zmqi@ustc.edu.cn

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Figure S2 (a) Low and (b) high magnification FESEM images of GO–CNT composite.

Figure S3 FESEM image of MoS2/GO–CNT composite.

Table S1 Electrochemical HER comparison of previously reported catalysts.

Catalyst Current density (mA·cm−2)

Overpotential (mV) Reference

Au supported MoS2 0.2 150 Science 2007, 317, 100.

Supported [Mo3S4]4+ 10 280 J. Phys. Chem. C 2008, 112, 17492.

MoS2/graphene 10 150 J. Am. Chem. Soc. 2011, 133, 7296.

Amorphous MoSx 15 200 Chem. Sci. 2011, 2, 1262.

MoO3-MoS2 core–shell nanowires 10 300 NanoLett. 2011, 11, 4168.

Nanoporous MoS2 10 200 Nature Mater. 2012, 11, 963.

Amorphous MoSx 10 200 ACS Catal. 2012, 2, 1916.

Exfoliated MoS2 10 210 NanoLett. 2013, 13, 6222.

Defect-rich MoS2 10 180 Adv. Mater. 2013, 25, 5807.

Amorphous carbon supported MoS2 NS 91 200 Nanoscale 2014, 6, 10680.

Li–MoS2 nanoparticles 62 200 ACS Nano 2014, 8, 4940.

Single layer MoS2 coating on carbon nanotubes 10 236 RSC Adv. 2014, 4, 34733.

MoS2-nitrogen doped graphene hydrogel film 10 140.6 Nano Energy 2014, 11, 11.

MoS2/N–MWCNT 80.3 200 Hydrogen Energy 2015, 40, 8877.

O–MoS2/G 20.6 120 Journal of Power Sources 2015, 195.

MoS2 NS 25 280 RSC Adv. 2015, 5, 89389.

MoS2/GO–CNT hybrid 74.25 150 This work

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Figure S4 XPS survey spectrum of reduced GO, COOH-functionalized MWCNTs, GO–CNT and MoS2/GO–CNT composite.

Figure S5 (a) Curve fit of the C1s spectra of reduced GO. (b) Curve fit of the C1s spectra of COOH-functionalized MWCNTs.

Figure S6 LSV of MoS2/GO–CNT with loading weight of GO.

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Figure S7 LSV of MoS2/GO–CNT with loading weight of MWCNTs.

Figure S8 Comparison of LSV of MoS2 nanosheets and MoS2/GO–CNT Pt measured in 0.1 M HClO4 and 0.1 M H2SO4 solution.