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题名: Controlled synthesis of high metal-loading, Pt-based electrocatalysts with enhanced activity and durability toward oxygen reduction reaction
作者: Li, Shushuang1;  Liu, Huiyuan1;  Wang, Ying1, 2;  Xu, Wei1, 2;  Li, Jia1, 2;  Liu, Yuan1;  Guo, Xinwen2;  Song, Yujiang1
刊名: RSC ADVANCES
发表日期: 2015
DOI: 10.1039/c4ra16026f
卷: 5, 期:12, 页:8787-8792
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: High metal-loading Pt/C electrocatalysts are much sought after for the fabrication of thin-layered membrane electrode assemblies (MEA) suitable for mass transport and balance control of water and heat. However, such electrocatalysts are still limited to commercial Pt/C, comprised of carbon-supported, 2-5 nm Pt particles without size and size uniformity control, causing poor activity and durability toward oxygen reduction reaction (ORR). Herein, we report the controlled synthesis of 59.9 wt% Pt/C by using metallic ion-containing reversed micelles adsorbed on carbon. Combined with a simple surfactant removal method of washing with water, this unique confining approach enables easy control over the size and size uniformity of the resultant Pt/C, leading to significantly improved activity and durability for ORR compared with commercial 60 wt% Pt/C. The ORR activity enhancement arises from a smaller average size of Pt nanoparticles in combination with a narrower size distribution, with more Pt nanoparticles falling in an optimal size range of 2-4 nm with the highest ORR activity. The narrower size distribution of our Pt/C also makes the Pt nanoparticles resistant to the dissolution-redeposition Ostwald ripening process, in which small Pt nanoparticles gradually shrink until they disappear, while large ones become bigger and bigger.
关键词[WOS]: FUEL-CELL APPLICATIONS ;  PLATINUM ;  CARBON ;  NANOPARTICLES ;  ELECTROOXIDATION ;  NANODENDRITES ;  MORPHOLOGY ;  CATALYSTS ;  SURFACES ;  ALLOYS
语种: 英语
WOS记录号: WOS:000347721300031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146008
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, Dalian Natl Labs Clean Energy DNL, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Div Chem Environm & Biol Sci & Technol, Dalian 116024, Peoples R China

Recommended Citation:
Li, Shushuang,Liu, Huiyuan,Wang, Ying,et al. Controlled synthesis of high metal-loading, Pt-based electrocatalysts with enhanced activity and durability toward oxygen reduction reaction[J]. RSC ADVANCES,2015,5(12):8787-8792.
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