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题名: Synthesis, Purification, and Electrocatalytic Activity of Platinum Nanocatalyst with Globular Dendritic Structure
作者: Si Weifeng1, 2;  Li Huanqiao1;  Yin Jie1;  Li Shushuang1;  Xie Yan1;  Li Jia1;  Lu Yang1, 2;  Liu Yuan1;  Xing Yongheng2;  Xu Huan2;  Song Yujiang1
关键词: globular dendritic structure ;  electrocatalytic activity ;  surfactant ;  platinum nanocatalyst ;  oxygen reduction ;  methanol oxidation
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2012-09-01
DOI: 10.3724/SP.J.1088.2012.20431
卷: 33, 期:9, 页:1601-1607
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A new Pt nanocatalyst was synthesized by chemical reduction of K2PtCl4 by ascorbic acid in the presence of a non-ionic surfactant Brij-35 (CH3(CH2)(10)CH2(OCH2CH2)(23)OH) in aqueous solution at room temperature. The obtained Pt nanocatalyst was characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy (EDX), X-ray powder diffraction, thermogravimetry (TG), and cyclic voltammetry (CV). The uniform Pt nanocatalyst possesses a globular dendritic morphology with a mean diameter of 36.9 nm. The branches of the globular dendrites are 2-4 nm in diameter and 4-6 nm in length. A simple purification method with multiple water washing was developed to remove Brij-35 and other by-products from the surface of Pt nanocatalyst. TG, EDX, and CV results show that the surface of Pt nanocatalyst after purification is as clean as that of commercial Pt black (fuel cell grade, 99.9%). Compared with commercial Pt black, Pt nanocatalyst demonstrates a higher electrochemical active surface area and significantly improved electrocatalytic activity to oxygen reduction and methanol oxidation.
关键词[WOS]: METHANOL FUEL-CELLS ;  BIMETALLIC NANODENDRITES ;  FACILE SYNTHESIS ;  NANOPARTICLES ;  REDUCTION ;  TEMPLATE ;  ANODE
语种: 英语
WOS记录号: WOS:000308972700024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143150
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
2.Liaoning Normal Univ, Coll Chem & Chem Engn, Dalian 116029, Liaoning, Peoples R China

Recommended Citation:
Si Weifeng,Li Huanqiao,Yin Jie,et al. Synthesis, Purification, and Electrocatalytic Activity of Platinum Nanocatalyst with Globular Dendritic Structure[J]. CHINESE JOURNAL OF CATALYSIS,2012,33(9):1601-1607.
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