In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 9, No. 45 ( 2021), p. 25513-25521
Abstract:
Boosting the activity of catalysts by constructing abundant low-coordinated sites is of considerable interest for maximizing the efficiency of catalysts. Equally importantly, three-dimensional imaging of these low-coordinated sites is crucial to the fundamental understanding of the relationship between the coordination environment and catalytic performance. Herein, we fabricate a novel class of hierarchical nanoporous gold which is rich in low-coordinated sites through solid-state plasma dealloying. For the first time, by using atomic-resolution electron tomography, we map out the coordination environment of the hierarchical nanoporous gold in three dimensions at the single-atom level. Quantitative coordination analysis reveals that owing to the introduction of substantial low-coordinated active sites with coordination numbers from 5 to 7, the catalytic performance of the hierarchical nanoporous gold in CO oxidation is improved. Our work provides in-depth insights into the relationship between the catalyst's coordination environment and catalytic performance, and the proof-of-concept demonstrated in this study is expected to be generally applicable to the design and study of a broad range of catalysts.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
detail.hit.zdb_id:
2702232-8
