Crystal Phase and Architecture Engineering of Lotus-Thalamus-Shaped Pt-Ni Anisotropic Superstructures for Highly Efficient Electrochemical Hydrogen Evolution

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

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Author(s)

  • Zhicheng Zhang
  • Guigao Liu
  • Xiaoya Cui
  • Bo Chen
  • Yihan Zhu
  • Yue Gong
  • Faisal Saleem
  • Shibo Xi
  • Yonghua Du
  • Armando Borgna
  • Zhuangchai Lai
  • Qinghua Zhang
  • Bing Li
  • Yun Zong
  • Yu Han
  • Lin Gu

Detail(s)

Original languageEnglish
Article number1801741
Journal / PublicationAdvanced Materials
Volume30
Issue number30
Online published7 Jun 2018
Publication statusPublished - 26 Jul 2018
Externally publishedYes

Abstract

The rational design and synthesis of anisotropic 3D nanostructures with specific composition, morphology, surface structure, and crystal phase is of significant importance for their diverse applications. Here, the synthesis of well-crystalline lotus-thalamus-shaped Pt-Ni anisotropic superstructures (ASs) via a facile one-pot solvothermal method is reported. The Pt-Ni ASs with Pt-rich surface are composed of one Ni-rich “core” with face-centered cubic (fcc) phase, Ni-rich “arms” with hexagonal close-packed phase protruding from the core, and facet-selectively grown Pt-rich “lotus seeds” with fcc phase on the end surfaces of the “arms.” Impressively, these unique Pt-Ni ASs exhibit superior electrocatalytic activity and stability toward the hydrogen evolution reaction under alkaline conditions compared to commercial Pt/C and previously reported electrocatalysts. The obtained overpotential is as low as 27.7 mV at current density of 10 mA cm−2, and the turnover frequency reaches 18.63 H2 s−1 at the overpotential of 50 mV. This work provides a new strategy for the synthesis of highly anisotropic superstructures with a spatial heterogeneity to boost their promising application in catalytic reactions.

Research Area(s)

  • anisotropic structures, crystal structures, electrocatalysis, hydrogen evolution reaction, Pt-Ni alloys

Citation Format(s)

Crystal Phase and Architecture Engineering of Lotus-Thalamus-Shaped Pt-Ni Anisotropic Superstructures for Highly Efficient Electrochemical Hydrogen Evolution. / Zhang, Zhicheng; Liu, Guigao; Cui, Xiaoya et al.
In: Advanced Materials, Vol. 30, No. 30, 1801741, 26.07.2018.

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