Concave Rhombic Dodecahedral Au Nanocatalyst with Multiple High-Index Facets for CO2 Reduction
- Authors
- Lee, Hye-Eun; Yang, Ki Dong; Yoon, Sang Moon; Ahn, Hyo-Yong; Lee, Yoon Young; Chang, Hyejin; Jeong, Dae Hong; Lee, Yoon-Sik; Kim, Mi Young; Nam, Ki Tae
- Issue Date
- Aug-2015
- Publisher
- AMER CHEMICAL SOC
- Keywords
- concave nanoparticle; catalyst; CO2 reduction; high-index facet; benzenethiol; gold
- Citation
- ACS NANO, v.9, no.8, pp.8384 - 8393
- Journal Title
- ACS NANO
- Volume
- 9
- Number
- 8
- Start Page
- 8384
- End Page
- 8393
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/83624
- DOI
- 10.1021/acsnano.5b03065
- ISSN
- 1936-0851
- Abstract
- 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.
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