Phase-Selective Epitaxial Growth of Heterophase Nanostructures on Unconventional 2H-Pd Nanoparticles

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yiyao Ge
  • Zhiqi Huang
  • Chongyi Ling
  • Bo Chen
  • Guigao Liu
  • Ming Zhou
  • Jiawei Liu
  • Xiao Zhang
  • Hongfei Cheng
  • Guanghua Liu
  • Yonghua Du
  • Cheng-Jun Sun
  • Jingtao Huang
  • Pengfei Yin
  • Ye Chen
  • Nailiang Yang

Detail(s)

Original languageEnglish
Pages (from-to)18971-18980
Journal / PublicationJournal of the American Chemical Society
Volume142
Issue number44
Online published21 Oct 2020
Publication statusPublished - 4 Nov 2020

Abstract

Heterostructured, including heterophase, noble-metal nanomaterials have attracted much interest due to their promising applications in diverse fields. However, great challenges still remain in the rational synthesis of well-defined noble-metal heterophase nanostructures. Herein, we report the preparation of Pd nanoparticles with an unconventional hexagonal close-packed (2H type) phase, referred to as 2H-Pd nanoparticles, via a controlled phase transformation of amorphous Pd nanoparticles. Impressively, by using the 2H-Pd nanoparticles as seeds, Au nanomaterials with different crystal phases epitaxially grow on the specific exposed facets of the 2H-Pd, i.e., face-centered cubic (fcc) Au (fcc-Au) on the (002)h facets of 2H-Pd while 2H-Au on the other exposed facets, to achieve well-defined fcc-2H-fcc heterophase Pd@Au core-shell nanorods. Moreover, through such unique facet-directed crystal-phase-selective epitaxial growth, a series of unconventional fcc-2H-fcc heterophase core-shell nanostructures, including Pd@Ag, Pd@Pt, Pd@PtNi, and Pd@PtCo, have also been prepared. Impressively, the fcc-2H-fcc heterophase Pd@Au nanorods show excellent performance toward the electrochemical carbon dioxide reduction reaction (CO2RR) for production of carbon monoxide with Faradaic efficiencies of over 90% in an exceptionally wide applied potential window from -0.9 to -0.4 V (versus the reversible hydrogen electrode), which is among the best reported CO2RR catalysts in H-type electrochemical cells.

Citation Format(s)

Phase-Selective Epitaxial Growth of Heterophase Nanostructures on Unconventional 2H-Pd Nanoparticles. / Ge, Yiyao; Huang, Zhiqi; Ling, Chongyi; Chen, Bo; Liu, Guigao; Zhou, Ming; Liu, Jiawei; Zhang, Xiao; Cheng, Hongfei; Liu, Guanghua; Du, Yonghua; Sun, Cheng-Jun; Tan, Chaoliang; Huang, Jingtao; Yin, Pengfei; Fan, Zhanxi; Chen, Ye; Yang, Nailiang; Zhang, Hua.

In: Journal of the American Chemical Society, Vol. 142, No. 44, 04.11.2020, p. 18971-18980.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review