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学科主题: 物理化学
题名: Monodispersed bimetallic PdAg nanoparticles with twinned structures: Formation and enhancement for the methanol oxidation
作者: Yin, Zhen1;  Zhang, Yining2;  Chen, Kai3;  Li, Jing4;  Li, Wenjing4;  Tang, Pei4;  Zhao, Huabo4;  Zhu, Qingjun5;  Bao, Xinhe6;  Ma, Ding4
通讯作者: ZhenYin
刊名: SCIENTIFIC REPORTS
发表日期: 2014-03-10
DOI: 10.1038/srep04288
卷: 4, 期:1, 页:04288
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
英文摘要: Monodispersed bimetallic PdAg nanoparticles can be fabricated through the emulsion-assisted ethylene glycol (EG) ternary system. Different compositions of bimetallic PdAg nanoparticles, Pd80Ag20, Pd65Ag35 and Pd46Ag54 can be obtained via adjusting the reaction parameters. For the formation process of the bimetallic PdAg nanoparticles, there have two-stage growth processes: firstly, nucleation and growth of the primary nanoclusters; secondly, formation of the secondary nanoparticles with the size-selection and relax process via the coalescence or aggregation of the primary nanoclusters. The as-prepared PdAg can be supported on the carbon black without any post-treatment, which exhibited high electro-oxidation activity towards methanol oxidation under alkaline media. More importantly, carbon-supported Pd80Ag20 nanoparticles reveal distinctly superior activities for the methanol oxidation, even if compared with commercial Pt/C electro-catalyst. It is concluded that the enhanced activity is dependant on the unique twinning structure with heterogeneous phase due to the dominating coalescence growth in EG ternary system.
关键词[WOS]: ALCOHOL FUEL-CELLS ;  OXYGEN REDUCTION ;  ALKALINE MEDIA ;  ETHANOL ELECTROOXIDATION ;  COLLOIDAL PARTICLES ;  NANOCRYSTAL GROWTH ;  ALLOY NANOCRYSTALS ;  NUCLEATION RATE ;  FORMIC-ACID ;  CATALYSTS
语种: 英语
WOS记录号: WOS:000332452000001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144276
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.Tianjin Polytech Univ, Dept Chem Engn, State Key Lab Hollow Fiber Membrane Mat & Proc, Tianjin 300387, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Energy Storage Div, Dalian 116023, Peoples R China
3.Univ Sci & Technol China, Chem Expt Teaching Ctr, Hefei 230026, Peoples R China
4.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
5.Natl Inst Clean & Low Carbon Energy, Beijing 102209, Peoples R China
6.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Yin, Zhen,Zhang, Yining,Chen, Kai,et al. Monodispersed bimetallic PdAg nanoparticles with twinned structures: Formation and enhancement for the methanol oxidation[J]. SCIENTIFIC REPORTS,2014,4(1):04288.
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