Synthesis of molybdenum carbide catalyst by DC arc plasma in ambient air for hydrogen evolution

Yuliya Z. Vassilyeva, Denys S. Butenko, Shilin Li, Wei Han, Alexander Y. Pak

Результат исследований: Материалы для журналаСтатьярецензирование

Аннотация

Electrochemical water splitting is attractive for hydrogen production, however, high cost of noble metal catalysts, such as platinum, restrict its use. Herein, molybdenum carbide nanoparticles encapsulated within carbon matrices as a high-performance and low-cost electrocatalyst for hydrogen evolution reaction (HER) were prepared by DC arc discharge plasma under ambient air conditions. According to XRD patterns the synthesized product includes molybdenum carbides (β-Mo2C and Mo1.2C0.8), molybdenum and graphite crystalline phases. The resulting material shows highly active catalytic properties with very small onset potential of −63 mV, a low overpotential of −226 mV at current density of 10 mA cm−2 and Tafel slope of 66.1 mV.dec−1 in 1.0 M KOH. The long-term HER stability test for 50 h under constant current density of 10 mA cm−2 confirmed the stability of the catalytic properties of the synthesized product. Therefore, such a method for producing Mo-based material for HER electrocatalysts is promising and can have practical application.

Язык оригиналаАнглийский
Номер статьи123509
ЖурналMaterials Chemistry and Physics
Том254
DOI
СостояниеОпубликовано - 1 ноя 2020

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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