Regulation of oxygen reduction reaction by the magnetic effect of L10-PtFe alloy

Fei Lu, Jian Wang, Junmeng Li, Yuting Du, Xiang Peng Kong, Shoujie Liu, Ding Yi, Yukiko K. Takahashi, Kazuhiro Hono, Xi Wang*, Jiannian Yao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

It is important to improve the oxygen reduction reaction (ORR) performance of Pt by alloying it with first-row transition metals (M: e.g., Fe, Co, Ni). It is known that the ligand, strain, and ensemble effects govern the ORR performance. However, the intrinsic magnetic characteristics of PtMs have rarely been focused on in ORR investigations. Here, we employed a hard-magnet L10-ordered PtFe nanopillar film (L10-PtFe NF) as model catalyst to uncover the catalyst's magnetic effect on the ORR. We report a five-fold enhancement of the catalytic efficiency of magnetized L10-PtFe(M) NF compared with unmagnetized one. Further investigations demonstrate that the coverage of chemisorbed oxygen on catalyst surface, especially the primary Pt dyz–O2 π* coupling, manipulated by the catalyst's magnetic field is the key factor for the ORR regulation. This work thus paves the way for the implementation of magnetic effect towards the precise regulation in broad catalysis applications.

Original languageEnglish
Article number119332
JournalApplied Catalysis B: Environmental
Volume278
DOIs
Publication statusPublished - 2020 Dec 5
Externally publishedYes

Keywords

  • L1-PtFe alloy
  • Magnetic effect
  • Model catalyst
  • Orbital coupling
  • Oxygen reduction reaction

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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