Gold nanodot assembly within a cobalt chalcogenide nanoshell: Promotion of electrocatalytic activity
- Authors
- Ngoc Minh Tran; Kim, Suncheol; Yoo, Hyojong
- Issue Date
- Jan-2022
- Publisher
- Academic Press
- Keywords
- Nanohybrids; Dots-in-shell; Nano metal-organic framework; Hollow structure; Oxygen evolution reaction
- Citation
- Journal of Colloid and Interface Science, v.605, pp.274 - 285
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of Colloid and Interface Science
- Volume
- 605
- Start Page
- 274
- End Page
- 285
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/108045
- DOI
- 10.1016/j.jcis.2021.07.075
- ISSN
- 0021-9797
- Abstract
- The assembly of functional nanoparticles within materials with unique architectures can improve the interfacial surfaces, defects, and active sites, which are key factors for the designing novel nanocatalysts. Nano metal-organic framework (NMOF) can be employed to fabricate nanodots-confined nanohybrids for use in electrocatalytic processes. Herein, we report a controlled synthesis of gold nanodot assembly within cobalt chalcogenide nanoshell (dots-in-shell Au/CoxSy nanohybrids). A cobalt-based NMOF (the cobalt-based zeolite imidazole framework, ZIF-67) is used as a versatile sacrificial template to yield dots-in-shell Au/CoxSy nanohybrids. Due to the synergistic effect of the well-dispersed Au nanodots and the thin CoxSy nanoshell, the obtained dots-in-shell Au/CoxSy nanohybrids exhibit enhanced performance for the oxygen evolution reaction (OER) with low overpotential values at a current density of 10 mA cm(-2) and a small Tafel slope (343 mV and 62 mV dec(-1), respectively). (C) 2021 Elsevier Inc. All rights reserved.
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