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Effect of oxidizing treatment on electrocatalytic activity of boron-doped amorphous carbon thin films

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2019, 29(5), pp.487-495
  • DOI : 10.1007/s42823-019-00053-9
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : December 18, 2018
  • Accepted : May 20, 2019
  • Published : October 1, 2019

Wang Chen-Song 1 Suo Ni 1 Huang Hao 1 Wu Ai-min 1 Cao Guo-Zhong 1 Zhang Gui-Feng 1

1Dalian University of Technology

Accredited

ABSTRACT

Boron-doped amorphous carbon (BDAC) thin films with a regular oxygen reduction reaction (ORR) catalytic activity were synthesized in a hot filament chemical vapor deposition device using a mixture of CH4 and H2 as a gas source and B2O3 as a boron source and then oxidized in air at 380–470 °C for 15–75 min. Scanning electron microscope, transmission electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy, and electrochemical tests were used to characterize the physical and electrochemical properties of the BDAC catalysts. It was concluded that the BDAC catalyst oxidized at 450 °C for 45 min showed the best ORR catalytic activity in alkaline medium. The oxygen reduction potential and the transfer electron number n, respectively, are − 0.286 V versus Ag/AgCl and 3.24 from the rotating disk electrode experiments. The treated carbon film has better methanol resistance and stability than the commercial Pt/C catalyst.

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