Segmented Au/PtCo heterojunction nanowires for efficient formic acid oxidation catalysis

Yingjun Sun, Bolong Huang, Yingjie Li, Yingnan Qin, Ziqi Fu, Mingzi Sun, Lei Wang, Shaojun Guo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

Exploring a new strategy for the removal of adsorbed CO (CO*) on a Pt surface at a low potential is the key to achieving enhanced catalysis for the formic acid oxidation reaction (FAOR); however, the development of such a strategy remains a significant challenge. Herein, we report a class of Au/PtCo heterojunction nanowires (HNWs) as efficient electrocatalysts for accelerating the FAOR. This heterojunction structure and the induced Co alloying effects can facilitate formic acid adsorption/activation on Pt with high CO tolerance, generating the FAOR pathway from dehydration to dehydrogenation. The optimized Au23/Pt63Co14 HNWs showed the highest specific and mass activities of 11.7 mA cm−2Pt and 6.42 A mg−1Pt reported to date, respectively, which are considerably higher than those of commercial Pt/C. DFT calculations confirmed that the electron-rich Au segment enhances the electronic activity of the PtCo NWs, which not only allows the construction of a highly efficient electron transfer channel for the FAOR but also suppresses CO formation.

Original languageEnglish
Pages (from-to)453-460
Number of pages8
JournalFundamental Research
Volume1
Issue number4
DOIs
Publication statusPublished - Jul 2021

Keywords

  • Electrocatalysis
  • Formic acid oxidation reaction
  • Heterojunction structure
  • Nanowires
  • Pt-based catalyst

ASJC Scopus subject areas

  • General

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