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


ABSTRACT: 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.

SUBMITTER: Khan MW 

PROVIDER: S-EPMC7484372 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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

Khan Muhammad Waqas MW   Loomba Suraj S   Ali Rashad R   Mohiuddin Md M   Alluqmani Ahmed A   Haque Farjana F   Liu Yongkun Y   Sagar Rizwan Ur Rehman RUR   Zavabeti Ali A   Alkathiri Turki T   Shabbir Babar B   Jian Xian X   Ou Jian Zhen JZ   Mahmood Asif A   Mahmood Nasir N  

Frontiers in chemistry 20200828


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 (MoO<sub>x</sub>) is developed via a facile and simple hydrothermal method, followed by annealing in the N<sub>2</sub> atmosphere and phosphorization to form a nitrogen-doped oxygenated molybdenum phosphide (N-MoP) sphere-shaped structure. The developed N-doped phosphide st  ...[more]

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