Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO2 Reduction

被引：233

作者：

Lee, Hye-Eun ^{[1
]}

Yang, Ki Dong ^{[1
]}

Yoon, Sang Moon ^{[1
]}

Ahn, Hyo-Yong ^{[1
]}

Lee, Yoon Young ^{[1
]}

Chang, Hyejin ^{[3
]}

Jeong, Dae Hong ^{[3
]}

Lee, Yoon-Sik ^{[2
]}

Kim, Mi Young ^{[1
]}

Nam, Ki Tae ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea

[3] Seoul Natl Univ, Dept Chem Educ, Seoul 151748, South Korea

来源：

ACS NANO | 2015年 / 9卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

concave nanoparticle; catalyst; CO2; reduction; high-index facet; benzenethiol; gold; RAMAN-SCATTERING PROPERTIES; CORE-SHELL NANOCRYSTALS; CARBON-MONOXIDE; GOLD NANOPARTICLES; DIOXIDE; ELECTROCATALYST; ELECTRODES; EVOLUTION; CATALYSTS; PLATINUM;

D O I：

10.1021/acsnano.5b03065

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A concave rhombic dodecahedron (RD) gold nanoparticle was synthesized by adding 4-aminothiophenol (4-ATP) during growth from seeds. This shape is enclosed by stabilized facets of various high-indexes, such as (331), (221), and (553). Because it is driven thermodynamically and stabilized by 4-ATP ligands, the concave RD maintains its structure over a few months, even after rigorous electrochemical reactions. We discussed the mechanism of the shape evolution controlled by 4-ATP and found that both the binding energy of Au-S and the aromatic geometry of 4-ATP are major determinants of Au atom deposition during growth. As a possible application, we demonstrated that the concave RD exhibits superior electrocatalytic performance for the selective conversion of CO2 to CO in aqueous solution.

引用

页码：8384 / 8393

页数：10

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