Facile synthesis of laminated porous WS2/C composite and its electrocatalysis for oxygen reduction reaction

21^st International Conference on Advanced Materials & Nanotechnology

September 04-06, 2018 | Zurich, Switzerland

Zhongshui Li, HuoDi Huang, Xiaofeng Zhang and Shen Lin

Fujian Normal University, China

Posters & Accepted Abstracts: Res. Rev. J Mat. Sci

DOI: 10.4172/2321-6212-C3-021

Abstract

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 fourelectron 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. 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. Huodi Huang, Xiaofeng Zhang, Yi Zhang, Baohua Huang, Jiannan Cai and Shen Lin* Facile Synthesis of Laminated Porous 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.

E-mail: zsli@fjnu.edu.cn

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