Gold nanodot assembly within a cobalt chalcogenide nanoshell: Promotion of electrocatalytic activity

Gold nanodot assembly within a cobalt chalcogenide nanoshell. [Display omitted] 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...

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Published in:Journal of colloid and interface science 2022-01, Vol.605, p.274-285
Main Authors: Tran, Ngoc Minh, Kim, Suncheol, Yoo, Hyojong
Format: Article
Language:English
Subjects:
Dots-in-shell
Hollow structure
Nano metal–organic framework
Nanohybrids
Oxygen evolution reaction
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container_title Journal of colloid and interface science
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creator Tran, Ngoc Minh
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description Gold nanodot assembly within a cobalt chalcogenide nanoshell. [Display omitted] 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).
doi_str_mv 10.1016/j.jcis.2021.07.075
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subjects Dots-in-shell
Hollow structure
Nano metal–organic framework
Nanohybrids
Oxygen evolution reaction
title Gold nanodot assembly within a cobalt chalcogenide nanoshell: Promotion of electrocatalytic activity
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