Seeded Synthesis of Unconventional 2H-Phase Pd Alloy Nanomaterials for Highly Efficient Oxygen Reduction

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
  • Bo Chen
  • Chongyi Ling
  • Jiawei Liu
  • Guanghua Liu
  • Jie Zhang
  • Gang Wang
  • Ye Chen
  • Lingwen Liao
  • Lei Wang
  • Qinbai Yun
  • Zhuangchai Lai
  • Jinlan Wang
  • Zijian Zheng
  • Hua Zhang

Detail(s)

Original languageEnglish
Pages (from-to)17292-17299
Journal / PublicationJournal of the American Chemical Society
Volume143
Issue number41
Online published6 Oct 2021
Publication statusPublished - 20 Oct 2021

Abstract

Crystal phase engineering of noble-metal-based alloy nanomaterials paves a new way to the rational synthesis of high-performance catalysts for various applications. However, the controlled preparation of noble-metal-based alloy nanomaterials with unconventional crystal phases still remains a great challenge due to their thermodynamically unstable nature. Herein, we develop a robust and general seeded method to synthesize PdCu alloy nanomaterials with unconventional hexagonal close-packed (hcp, 2H type) phase and also tunable Cu contents. Moreover, galvanic replacement of Cu by Pt can be further conducted to prepare unconventional trimetallic 2H-PdCuPt nanomaterials. Impressively, 2H-Pd67Cu33 nanoparticles possess a high mass activity of 0.87 A mg-1Pd at 0.9 V (vs reversible hydrogen electrode (RHE)) in electrochemical oxygen reduction reaction (ORR) under alkaline condition, which is 2.5 times that of the conventional face-centered cubic (fcc) Pd69Cu31 counterpart, revealing the important role of crystal phase on determining the ORR performance. After the incorporation of Pt, the obtained 2H-Pd71Cu22Pt7 catalyst shows a significantly enhanced mass activity of 1.92 A mg-1Pd+Pt at 0.9 V (vs RHE), which is 19.2 and 8.7 times those of commercial Pt/C and Pd/C, placing it among the best reported Pd-based ORR electrocatalysts under alkaline conditions.

Citation Format(s)

Seeded Synthesis of Unconventional 2H-Phase Pd Alloy Nanomaterials for Highly Efficient Oxygen Reduction. / Ge, Yiyao; Wang, Xixi; Huang, Biao; Huang, Zhiqi; Chen, Bo; Ling, Chongyi; Liu, Jiawei; Liu, Guanghua; Zhang, Jie; Wang, Gang; Chen, Ye; Li, Lujiang; Liao, Lingwen; Wang, Lei; Yun, Qinbai; Lai, Zhuangchai; Lu, Shiyao; Luo, Qinxin; Wang, Jinlan; Zheng, Zijian; Zhang, Hua.

In: Journal of the American Chemical Society, Vol. 143, No. 41, 20.10.2021, p. 17292-17299.

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