Frontiers in Chemistry (Aug 2020)

Nitrogen-Doped Oxygenated Molybdenum Phosphide as an Efficient Electrocatalyst for Hydrogen Evolution in Alkaline Media

  • Muhammad Waqas Khan,
  • Muhammad Waqas Khan,
  • Suraj Loomba,
  • Rashad Ali,
  • Md Mohiuddin,
  • Ahmed Alluqmani,
  • Farjana Haque,
  • Yongkun Liu,
  • Rizwan Ur Rehman Sagar,
  • Ali Zavabeti,
  • Ali Zavabeti,
  • Turki Alkathiri,
  • Turki Alkathiri,
  • Babar Shabbir,
  • Xian Jian,
  • Xian Jian,
  • Jian Zhen Ou,
  • Asif Mahmood,
  • Nasir Mahmood

DOI
https://doi.org/10.3389/fchem.2020.00733
Journal volume & issue
Vol. 8

Abstract

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Phosphides of transition metals (TMPs) are a developing class of materials for hydrogen evolution reaction (HER) as an alternative to expensive noble metals to produce clean energy. Herein, the nitrogen-doped molybdenum oxide (MoOx) is developed via a facile and simple hydrothermal method, followed by annealing in the N2 atmosphere and phosphorization to form a nitrogen-doped oxygenated molybdenum phosphide (N-MoP) sphere-shaped structure. The developed N-doped phosphide structure depicts enhanced HER activity by reaching a current density of 10 mA cm−2 at a very low overpotential of only 87 mV, which is much better than annealed nitrogen-doped molybdenum oxide (A-MoOx) 138 mV in alkaline medium. N-MoP is a highly efficient electrocatalyst for HER attributed to a more exposed surface, large electrode/electrolyte interface and appropriate binding energies for reactants. This study extends the opportunity of developing nitrogen-doped TMPs, which can display exceptional properties as compared to their oxides.

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