Porous hollow carbon spheres for electrode material of supercapacitors and support material of dendritic Pt electrocatalyst

JOURNAL OF POWER SOURCES

卷:280

Article

Fan, Yang¹  Liu, Pei-Fang¹  Huang, Zhong-Yuan¹  Jiang, Tong-Wu¹  Yao, Kai-Li¹  Han, Ran¹ 

[1] Xinyang Normal Univ, Coll Chem & Chem Engn, Xinyang 464000, Peoples R China

关键词: Hollow carbon spheres;    Alginic acid;    Supercapacitors;    Pt nanodendrites;    Electrocatalysts;    Methanol oxidation;   

DOI  :  10.1016/j.jpowsour.2015.01.096

来源: Elsevier

【 摘 要 】

Porous hollow carbon spheres (PHCSs) are prepared through hydrothermal carbonization of alginic acid and subsequent chemical activation by KOH. The porosity of the alginic acid derived PHCSs can be finely modulated by varying activation temperature in the range of 600-900 degrees C. The PHCSs activated at 900 degrees C possess the largest specific surface area (2421 m(2) g(-1)), well-balanced micro- and mesoporosity, as well as high content of oxygen-containing functional groups. As the electrode material for supercapacitors, the PHCSs exhibit superior capacitive performance with specific capacitance of 314 F g(-1) at current density of 1 A g(-1). Pt nanodendrites supported on the PHCSs are synthesized by polyol reduction method which exhibit high electrocatalytic activity towards methanol oxidation reaction (MOR). Moreover, CO-poisoning tolerance of the Pt nanodendrites is greatly enhanced owing to the surface chemical property of the PHCSs support. (C) 2015 Elsevier B.V. All rights reserved.

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