The high performance of tungsten carbides/porous bamboo charcoals supported Pt catalysts for methanol electrooxidation

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• 作者：Chun-an Ma ; Chenbin Xu ; Meiqin Shi ; Guanghui Song ; Xiaoling Lang
• 关键词：Bamboo charcoals (BCs) ; Tungsten carbide (WC) ; Three-dimensional structure ; Methanol oxidation ; CO tolerance
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：15 November, 2013
• 年：2013
• 卷：242
• 期：Complete
• 页码：273-279
• 全文大小：2887 K

文摘

In this paper, a kind of environmental friendly and cost-effective bamboo charcoal?(BC) is used as catalyst support in DMFCs instead of carbon nanotubes (CNTs), which is toxic and expensive. After special treatments, we obtain a sponge-like three-dimensional (3D) BC, which can provide high specific surface area (1264.5?m²?g^?1) and porous matrices. Then, tungsten carbide (WC) and Pt are loaded on the BCs with microwave-assisted technique and 3D structural Pt/WC/BCs electro-catalyst is finally fabricated. Subsequently, the catalyst is characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In the further electrochemical investigation, it was found that Pt/WC/BCs catalyst has higher performance (2.76?mA?cm^?2) and better CO-tolerance for methanol oxidation compared with Pt/WC/CNTs and commercial Pt/C. Herein, we believe that the as-synthesized 3D Pt/WC/BCs catalyst has great promising application in DMFCs.