Web-like 3D Architecture of Pt Nanowires and Sulfur-Doped Carbon Nanotube with Superior Electrocatalytic Performance

Md Ariful Hoque, Fathy M. Hassan, Altamash M. Jauhar, Gaopeng Jiang, Mark Pritzker, Ja Yeon Choi, Shanna Knights, Siyu Ye, Zhongwei Chen

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Development of highly durable electrocatalysts for oxygen reduction reaction (ORR) is critical for proton exchange membrane fuel cells. Herein, we report the synthesis, characterization, and electrochemical performance of 1D sulfur-doped carbon nanotubes (S-CNT) supported 1D Pt nanowires (PtNW/S-CNT). PtNW/S-CNT synthesized by a modified solvothermal method possesses a unique web-like 3D architecture that is beneficial for oxygen reduction. We demonstrate that PtNW/S-CNT exhibits impressive activity retention under potential cycling between 0.05 and 1.5 V vs RHE over 3000 cycles. The reductions in electrochemically active surface area (ECSA, 7% loss) and mass activity (19% loss) of PtNW/S-CNT after accelerated durability testing (ADT) are found to be much lower than the dramatic losses observed with commercial Pt/C (>99% loss in ECSA and mass activity) under identical conditions. The PtNW/S-CNT catalyst also shows very high specific activity (1.61 mA cm-2) in comparison to Pt/C (0.24 mA cm-2).

Original languageEnglish
Pages (from-to)93-98
Number of pages6
JournalACS Sustainable Chemistry and Engineering
Volume6
Issue number1
DOIs
Publication statusPublished - Jan 2 2018
Externally publishedYes

Keywords

  • Carbon nanotubes
  • Electrocatalyst
  • Fuel cells
  • Oxygen reduction reaction
  • Pt nanowires

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

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