Growth mechanism of core-shell PtNi-Ni nanoparticles using in situ transmission electron microscopy

被引：19

作者：

Zheng, Liyun ^{[1
,2
,3
]}

Zhang, Xiaowei ^{[3
,4
]}

Bustilto, Karen C. ^{[5
]}

Yao, Yuan ^{[6
]}

Zhao, Lixin ^{[1
]}

Zhu, Minggang ^{[2
]}

Li, Wei ^{[2
]}

Zheng, Haimei ^{[3
,7
]}

机构：

[1] Hebei Univ Engn, Coll Mat Sci & Engn, Handan 056038, Handan, Peoples R China

[2] Cent Iron & Steel Res Inst, Div Funct Mat, Beijing 100081, Peoples R China

[3] Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA

[4] Ningbo Univ, Dept Elect Engn & Comp Sci, Ningbo 315211, Zhejiang, Peoples R China

[5] Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Mol Foundry, Berkeley, CA 94720 USA

[6] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[7] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

来源：

NANOSCALE | 2018年 / 10卷 / 24期

关键词：

MONODISPERSE NICKEL NANOPARTICLES; OXYGEN REDUCTION REACTION; AU; ELECTROCATALYSIS; NANOSTRUCTURES; CATALYSIS; SURFACES; TEM;

D O I：

10.1039/c8nr01625a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Controlling the growth, morphology and structure of nanocrystals is fundamental to achieving facet dependent physical and chemical properties. Core-shell PtNi-Ni nanoparticles' evolution was investigated using in situ liquid cell transmission electron microscopy (TEM). A two-stage growth of core-shell PtNi-Ni nanoparticles was observed. The platinum (Pt)-based binary alloy was formed initially by a thermodynamically driven process, then grown by a monomer attachment process, and then the core formed and the process was stopped by depletion of the Pt precursor, and finally the nickel (Ni) shell formed. This growth process gives a way to grow a metallic shell for novel catalysts.

引用

页码：11281 / 11286

页数：6

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