Hexagonal PtBi Intermetallic Inlaid with Sub-Monolayer Pb Oxyhydroxide Boosts Methanol Oxidation

Wen Chen, Shuiping Luo, Mingzi Sun, Min Tang, Xiaokun Fan, Yu Cheng, Xiaoyu Wu, Yujia Liao, Bolong Huang, Zewei Quan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Engineering multicomponent nanocatalysts is effective to improve electrocatalysis in many applications, yet it remains a challenge in constructing well-defined multimetallic active sites at the atomic level. Herein, the surface inlay of sub-monolayer Pb oxyhydroxide onto hexagonal PtBi intermetallic nanoplates with intrinsically isolated Pt atoms to boost the methanol oxidation reaction (MOR) is reported. The well-defined PtBi@6.7%Pb nanocatalyst exhibits 4.0 and 7.4 times higher mass activity than PtBi nanoplates and commercial Pt/C catalyst toward MOR in the alkaline electrolyte at 30 °C. Meanwhile, it also achieves a record-high mass activity of 51.07 A mg–1Pt at direct methanol fuel cells operation temperature of 60 °C. DFT calculations reveal that the introduction of Pb oxyhydroxide on the surface not only promotes the electron transfer efficiency but also suppresses the CO poisoning effect, and the efficient p-d coupling optimizes the electroactivity of PtBi@6.7%Pb nanoplates toward the MOR process with low reaction barriers. This work offers a nanoengineering strategy to effectively construct and modulate multimetallic nanocatalysts to improve the electroactivity toward the MOR in future research.

Original languageEnglish
Article number2107803
JournalSmall
Volume18
Issue number14
DOIs
Publication statusPublished - 7 Apr 2022

Keywords

  • electrocatalysis
  • intermetallic
  • methanol oxidation
  • Pb oxyhydroxide

ASJC Scopus subject areas

  • Biotechnology
  • Chemistry(all)
  • Biomaterials
  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Hexagonal PtBi Intermetallic Inlaid with Sub-Monolayer Pb Oxyhydroxide Boosts Methanol Oxidation'. Together they form a unique fingerprint.

Cite this