2D/0D hierarchical heterostructures prepared via facet‐selective epitaxial growth of triangular Rh nanoplates on 2H‐Pd nanoparticles

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article numbere20220026
Journal / PublicationNatural Sciences
Volume2
Issue number4
Online published11 Aug 2022
Publication statusPublished - Oct 2022

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Abstract

Phase engineering of nanomaterials opens a promising gateway to the construction of noble metal hierarchical heterostructures in a well-defined manner. Here, by using zero-dimensional (0D) Pd nanoparticles with hexagonal close-packed (hcp, 2H type) phase, denoted as 2H-Pd, as seeds, we report a facet-selective epitaxial growth method to prepare two-dimensional (2D)/0D Pd@Rh hierarchical heterostructures, in which two parallel triangular Rh nanoplates selectively grow on two opposite (002)h facets of 2H-Pd due to the confined growth of Rh along <002>h direction. Systematic characterizations demonstrate that a phase transformation from 2H phase to 2H/face-centered cubic (fcc) heterophase occurs during the formation of such 2D/0D hierarchical heterostructure with the continuous growth of Rh nanoplates. The obtained 2D/0D Pd@Rh hierarchical heterostructures with a Pd/Rh atomic ratio of ∼39/61, denoted as Pd39@Rh61, exhibit excellent performance toward electrochemical hydrogen evolution reaction (HER) in acid electrolyte. To reach the current density of 10 mA cm–2, the overpotential of only 21.3 mV is required for the 2D/0D Pd39@Rh61, which is comparable to commercial Pt/C and also among the best Rh-based HER catalysts reported until now. © 2022 The Authors. Natural Sciences published by Wiley-VCH GmbH.

Research Area(s)

  • 2D/0D hierarchical heterostructure, facet-selective epitaxial growth, heterophase nanostructure, hydrogen evolution reaction, phase engineering

Citation Format(s)

2D/0D hierarchical heterostructures prepared via facet‐selective epitaxial growth of triangular Rh nanoplates on 2H‐Pd nanoparticles. / Wang, Xixi; Ge, Yiyao; Zhang, Qinghua et al.
In: Natural Sciences, Vol. 2, No. 4, e20220026, 10.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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