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Atomistic understanding of the origin of high oxygen reduction electrocatalytic activity of cuboctahedral Pt3Co-Pt core-shell nanoparticles
Hu, GZ (Hu, Guangzhi); Gracia-Espino, E (Gracia-Espino, Eduardo); Sandstrom, R (Sandstrom, Robin); Sharifi, T (Sharifi, Tiva); Cheng, SD (Cheng, Shaodong); Shen, HJ (Shen, Hangjia); Wang, CY (Wang, Chuanyi); Guo, SJ (Guo, Shaojun); Yang, G (Yang, Guang); Wagberg, T (Wagberg, Thomas)
2016
发表期刊CATALYSIS SCIENCE & TECHNOLOGY
卷号6期号:5页码:1393-1401
摘要PtM-based core-shell nanoparticles are a new class of active and stable nanocatalysts for promoting oxygen reduction reaction (ORR); however, the understanding of their high electrocatalytic performance for ORR at the atomistic level is still a great challenge. Herein, we report the synthesis of highly ordered and homogeneous truncated cuboctahedral Pt3Co-Pt core-shell nanoparticles (cs-Pt3Co). By combining atomic resolution electron microscopy, X-ray photoelectron spectroscopy, extensive first-principles calculations, and many other characterization techniques, we conclude that the cs-Pt3Co nanoparticles are composed of a complete or nearly complete Pt monolayer skin, followed by a secondary shell containing 5-6 layers with similar to 78 at% of Pt, in a Pt3Co configuration, and finally a Co-rich core with 64 at% of Pt. Only this particular structure is consistent with the very high electrocatalytic activity of cs-Pt3Co nanoparticles for ORR, which is about 6 times higher than commercial 30%-Pt/Vulcan and 5 times more active than non-faceted (spherical) alloy Pt3Co nanoparticles. Our study gives an important insight into the atomistic design and understanding of advanced bimetallic nanoparticles for ORR catalysis and other important industrial catalytic applications.
DOI10.1039/c5cy01128k
收录类别SCI
WOS记录号WOS:000371607600014
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/4702
专题环境科学与技术研究室
作者单位1.Umea Univ, Dept Phys, S-90187 Umea, Sweden
2.Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab, Minist Educ, Xian 710049, Peoples R China
3.Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China
4.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
5.Los Alamos Natl Lab, Phys Chem & Appl Spect, POB 1663, Los Alamos, NM 87545 USA
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Hu, GZ ,Gracia-Espino, E ,Sandstrom, R ,et al. Atomistic understanding of the origin of high oxygen reduction electrocatalytic activity of cuboctahedral Pt3Co-Pt core-shell nanoparticles[J]. CATALYSIS SCIENCE & TECHNOLOGY,2016,6(5):1393-1401.
APA Hu, GZ .,Gracia-Espino, E .,Sandstrom, R .,Sharifi, T .,Cheng, SD .,...&Wagberg, T .(2016).Atomistic understanding of the origin of high oxygen reduction electrocatalytic activity of cuboctahedral Pt3Co-Pt core-shell nanoparticles.CATALYSIS SCIENCE & TECHNOLOGY,6(5),1393-1401.
MLA Hu, GZ ,et al."Atomistic understanding of the origin of high oxygen reduction electrocatalytic activity of cuboctahedral Pt3Co-Pt core-shell nanoparticles".CATALYSIS SCIENCE & TECHNOLOGY 6.5(2016):1393-1401.
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