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Volume 6 Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212 Advanced Materials 2018
September 04-06, 2018
September 04-06, 2018 | Zürich, Switzerland
21st International Conference on
Advanced Materials & Nanotechnology
Facile synthesis of laminatedporousWS2/Ccomposite and its electrocatalysis for oxygen reduction reaction
Zhongshui Li, HuoDi Huang, Xiaofeng Zhang and Shen Lin
Fujian Normal University, China
The Vulcan XC-72R supported WS2 nanocomposite (WS2/C)was prepared by solid reaction process combined
with sonication. The as-prepared WS2/C nanocomposite presents a laminated porous structure by SEM and TEM
characterization. The electrochemical experiments show that the onset potential and the limiting-current density of WS2/C
is 0.78 V and 4.99 mA cm-2, respectively, which is much higher than that of WS2 (3.12 mA cm-2) and Vulcan XC-72R (2.79
mA cm-2). The number of transfer electrons in ORR at the WS2/C nanocomposite electrode is 3.70, which is close to four-
electron process. Besides, the current density of WS2/C nanocomposites remained at 90% after 20000 s, indicating its superior
electrochemical stability. All these facts reveal that the as-prepared WS2/C nanocomposite can be regarded as a promising
cathode ORR catalyst for fuel cell.
Fig.1 Cyclic voltammograms of WS2/C (A) and different modified electrodes(B) in 0.1 M KOH solution at Scan rate of 30 mV s-1.
Fig.2 ORR polarization curves of different modified electrodein 0.1 M KOH saturated with O2 at a rotating rate of 1600 rpm.
Recent Publications
1. Yang Z, Nie H, Chen X, Chen X, Huang S. Recent progress in doped carbon nanomaterials as effective cathode catalysts
for fuel cell oxygen reduction reaction. J Power Sources 2013; 236(16):238-249.
2. Chua X J, Luxa J, Eng A Y S, Tan S M, Sofer Zd, Pumera M. Negative electrocatalytic effects of p-doping niobium and
tantalum on MoS2 and WS2 for the hydrogen evolution reaction and oxygen reduction reaction. ACS Catal 2016; 6(9):
5724-5734.
3. Chia X, Eng A Y S, Ambrosi A, Tan S M, Pumera M. Electrochemistry of nanostructured layered transition-metal
dichalcogenides. Chem Rev 2015; 115(21): 11941-11966.
4. Illathvalappil R, Unni S M, Kurungot S. Layer-separated MoS2 bearing reduced graphene oxide formed by an in situ
intercalation-cum-anchoring route mediated by Co(OH)2 as a Pt-free electrocatalyst for oxygen reduction. Nanoscale
2015; 7(40):16729-36.
5. HuodiHuang, XiaofengZhang, Yi Zhang, BaohuaHuang, JiannanCai and ShenLin* Facile Synthesis of LaminatedPorous
WS2/C Composite and Its Electrocatalysis for Oxygen Reduction Reaction Int J Hydrogen Energy 43(2018),8290-8297.
Biography
Xiaofeng Zhang graduated with PhD in chemistry from Fujian Normal University (P.R. China) in 2016. She is under the supervision of Prof. Shen Lin, majoring
in physical chemistry and materials chemistry. Her scientific interests focus on non-precious metal oxides/graphene composites and their catalytic properties of
oxygen reduction.
Zhongshui Li et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C3-021