Ultrasmall molybdenum carbide nanocrystals coupled with reduced graphene oxide supported Pt nanoparticles as enhanced synergistic catalyst for methanol oxidation reaction

被引：16
|
作者：
He, Chunyong [1 ,2 ]
Tao, Juzhou [1 ,2 ]
He, Guoqiang [3 ]
Shen, Pei Kang [3 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Dongguan Neutron Sci Ctr, Dongguan 523803, Peoples R China
[3] Guangxi Univ, Collaborat Innovat Ctr Sustainable Energy Mat, Nanning 530004, Guangxi, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2016年 / 216卷
关键词：
Ultrasmall; Molybdenum Carbide; Electrocatalyst; Methanol Oxidation Reaction; Direct Methanol Fuel Cells; HYDROGEN EVOLUTION REACTION; OXYGEN REDUCTION REACTION; ONE-POT SYNTHESIS; TUNGSTEN CARBIDE; FUEL-CELLS; GRAPHITIZED CARBON; EXCELLENT ELECTROCATALYSTS; ASSISTED SYNTHESIS; PT NANOPARTICLES; AU CORE;
D O I：
10.1016/j.electacta.2016.09.037
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Ultrasmall molybdenum carbide (MoC) nanocrystals coupled with reduced graphene oxide (RGO) hybrid was successfully synthesized and applied as support for Pt nanoparticles (Pt/MoC-RGO). Compare to the commercial Pt/C, the Pt/MoC-RGO catalyst show remarkable enhanced electrocatalytic activity for methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs). The peak current density of Pt/MoC-RGO is 2.4 times of Pt/C. The Pt/MoC-RGO also shows a significant improved CO resistance ability, which likely originates from the abundant Pt-MoC-RGO three-phase interfaces in Pt/MoC-RGO. The long-term stability results show that the electrochemical durability of the Pt/MoC-RGO for MOR is much better than Pt/C, making it a promising next generation electrocatalysts in DMFCs. X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) analyses reveal the strong synergetic chemical coupling interaction between the Pt nanoparticles and MoC-RGO, which result in significantly enhanced electrocatalytic activity for MOR. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：295 / 303
页数：9
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