Template-Directed Rapid Synthesis of Pd-Based Ultrathin Porous Intermetallic Nanosheets for Efficient Oxygen Reduction

Jingchun Guo, Lei Gao, Xin Tan, Yuliang Yuan, Jeonghyeon Kim, Yu Wang, Hui Wang, Yu Jia Zeng, Sang Il Choi, Sean C. Smith, Hongwen Huang

Research output: Contribution to journalArticlepeer-review

139 Scopus citations

Abstract

Atomically ordered intermetallic nanoparticles exhibit improved catalytic activity and durability relative to random alloy counterparts. However, conventional methods with time-consuming and high-temperature syntheses only have rudimentary capability in controlling the structure of intermetallic nanoparticles, hindering advances of intermetallic nanocatalysts. We report a template-directed strategy for rapid synthesis of Pd-based (PdM, M=Pb, Sn and Cd) ultrathin porous intermetallic nanosheets (UPINs) with tunable sizes. This strategy uses preformed seeds, which act as the template to control the deposition of foreign atoms and the subsequent interatomic diffusion. Using the oxygen reduction reaction (ORR) as a model reaction, the as-synthesized Pd3Pb UPINs exhibit superior activity, durability, and methanol tolerance. The favored geometrical structure and interatomic interaction between Pd and Pb in Pd3Pb UPINs are concluded to account for the enhanced ORR performance.

Original languageEnglish
Pages (from-to)10942-10949
Number of pages8
JournalAngewandte Chemie - International Edition
Volume60
Issue number19
DOIs
StatePublished - 3 May 2021

Keywords

  • oxygen reduction reaction
  • palladium
  • porous intermetallic nanosheets
  • universal synthesis

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