Alloying–realloying enabled high durability for Pt–Pd-3d-transition metal nanoparticle fuel cell catalysts

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

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Author(s)

  • Zhi-Peng Wu
  • Dominic T. Caracciolo
  • Yazan Maswadeh
  • Jianguo Wen
  • Zhijie Kong
  • Shiyao Shan
  • Jorge A. Vargas
  • Shan Yan
  • Emma Hopkins
  • Keonwoo Park
  • Anju Sharma
  • Valeri Petkov
  • Lichang Wang
  • Chuan-Jian Zhong

Detail(s)

Original languageEnglish
Article number859
Journal / PublicationNature Communications
Volume12
Online published8 Feb 2021
Publication statusPublished - 2021
Externally publishedYes

Link(s)

Abstract

Alloying noble metals with non-noble metals enables high activity while reducing the cost of electrocatalysts in fuel cells. However, under fuel cell operating conditions, state-of-the-art oxygen reduction reaction alloy catalysts either feature high atomic percentages of noble metals (>70%) with limited durability or show poor durability when lower percentages of noble metals (<50%) are used. Here, we demonstrate a highly-durable alloy catalyst derived by alloying PtPd (<50%) with 3d-transition metals (Cu, Ni or Co) in ternary compositions. The origin of the high durability is probed by in-situ/operando high-energy synchrotron X-ray diffraction coupled with pair distribution function analysis of atomic phase structures and strains, revealing an important role of realloying in the compressively-strained single-phase alloy state despite the occurrence of dealloying. The implication of the finding, a striking departure from previous perceptions of phase-segregated noble metal skin or complete dealloying of non-noble metals, is the fulfilling of the promise of alloy catalysts for mass commercialization of fuel cells.

Research Area(s)

Citation Format(s)

Alloying–realloying enabled high durability for Pt–Pd-3d-transition metal nanoparticle fuel cell catalysts. / Wu, Zhi-Peng; Caracciolo, Dominic T.; Maswadeh, Yazan et al.
In: Nature Communications, Vol. 12, 859, 2021.

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

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