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

被引：20
作者：
Huang, Huodi [1 ,2 ,3 ]
Zhang, Xiaofeng [1 ,2 ,3 ]
Zhang, Yi [1 ,2 ,3 ]
Huang, Baohua [1 ,2 ,3 ]
Cai, Jiannan [1 ,2 ,3 ]
Lin, Shen [1 ,2 ,3 ]
机构：
[1] Fujian Normal Univ, Coll Chem & Mat Sci, Fuzhou, Fujian, Peoples R China
[2] Fujian Prov Key Lab Polymer Mat, Fuzhou, Fujian, Peoples R China
[3] Fujian Prov Key Adv Mat Oriented Chem Engn, Fuzhou, Fujian, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2018年 / 43卷 / 17期
基金：
中国国家自然科学基金;
关键词：
Transition metal sulfide; Laminated; Oxygen reduction reaction; Vulcan XC-72R; Electrocatalysis; HYDROGEN EVOLUTION REACTION; RECENT PROGRESS; DOPED CARBON; METAL; CATALYSTS; PERFORMANCE; MOS2; ELECTROCHEMISTRY; HYBRIDS; GROWTH;
D O I：
10.1016/j.ijhydene.2018.03.059
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：
The Vulcan XC-72R modified 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, 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 20,000 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. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：8290 / 8297
页数：8
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