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题名: Three-Dimensional Assembly of PtNi Alloy Nanosticks with Enhanced Electrocatalytic Activity and Ultrahigh Stability for the Oxygen Reduction Reaction
作者: Zhang, Hongjie1, 2;  Yi, Baolian1;  Jiang, Shangfeng1, 2;  Zeng, Yachao1, 2;  Shao, Zhigang1
关键词: oxygen reduction reaction ;  PtNi alloy ;  nanostick assembly ;  enhanced activity ;  ultrahigh stability
刊名: CHEMELECTROCHEM
发表日期: 2017-06-01
DOI: 10.1002/celc.201700085
卷: 4, 期:6, 页:1436-1442
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: A three-dimensional (3D) assembly of PtNi alloy nanosticks (NSA) is synthesized through an effective organic solvothermal approach to enhance the specific activity and long-term durability for the oxygen reduction reaction (ORR). The 3D PtNi NSA is composed of interconnected nanosticks with an average diameter of approximately 5 nm, which are confirmed to be of high crystallinity with ordered atomic arrangement of ORR-favorable PtNi (111). After an electrochemical dealloying process, the surface of the nanosticks becomes rough with a large quantity of step-like nanostructures, which are verified to effectively improve the ORR activity. The electrochemical results of half-cell tests demonstrate that the 3D PtNi alloy NSA exhibits a 4.5 times higher mass activity than the Pt/C (20 wt%, JM) catalyst (0.58 A/mg) and a 5.1 times higher specific activity (742 mu A/cm(2)). Most importantly, after the accelerated deterioration test, the 3D PtNi alloy NSA catalyst shows almost no activity decrease, both in half- and single-cell tests. The 3D PtNi alloy NSA prepared here is indeed a promising electrocatalyst for practical electrocatalytic applications.
关键词[WOS]: FUEL-CELLS ;  CORE-SHELL ;  PARTICLE-SIZE ;  CATALYSTS ;  METAL ;  NANOPARTICLES ;  DURABILITY ;  NANOWIRES ;  SURFACES ;  METHANOL
语种: 英语
WOS记录号: WOS:000407694400024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149832
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, Fuel Cell Syst & Engn Lab, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Yuquan Rd, Beijing 100039, Peoples R China

Recommended Citation:
Zhang, Hongjie,Yi, Baolian,Jiang, Shangfeng,et al. Three-Dimensional Assembly of PtNi Alloy Nanosticks with Enhanced Electrocatalytic Activity and Ultrahigh Stability for the Oxygen Reduction Reaction[J]. CHEMELECTROCHEM,2017,4(6):1436-1442.
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