Underpotential deposition of lead on quasi-spherical and faceted gold nanoparticles

被引：24

作者：

Jeyabharathi, C. ^{[1
]}

Zander, M. ^{[2
]}

Scholz, F. ^{[1
]}

机构：

[1] Ernst Moritz Arndt Univ Greifswald, Inst Biochem, Felix Hausdotff Str 4, D-17487 Greifswald, Germany

[2] Ernst Moritz Arndt Univ Greifswald, Inst Geol & Geog, Friedrich Ludwig Jahn Str 17A, D-17487 Greifswald, Germany

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2018年 / 819卷

关键词：

Gold; Nanoparticles; Underpotential deposition; Lead; Crystallinity; SINGLE-CRYSTAL FACES; CRYSTALLOGRAPHIC ORIENTATION; ELECTROCATALYTIC ACTIVITY; POLYCRYSTALLINE GOLD; AU(111); PB; SURFACE; ELECTRODE; REACTIVITY; INTERFACES;

D O I：

10.1016/j.jelechem.2017.10.011

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The underpotential deposition of lead was studied on spherical and faceted gold nanoparticles. On 21.7 nm spherical nanoparticles, a single stripping peak from Au(111) face was observed at -0.2 V, whereas on 82 nm faceted gold nanoparticles the peak split in to two at -0.2 V and -0.18 V vs Ag/AgCl (3 M KCl). The roughening of the Au(111) terraces by electrochemical treatment leads to the suppression of the spike. It appears that the extent of surface crystallinity of nanoparticles causes the observed differences in the upd-stripping behaviour. The splitting of the Pb-upd stripping peak from Au(111) face can be used as an indication for the surface crystallinity of gold nanoparticles.

引用

页码：159 / 162

页数：4

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