Phosphorus Dual-Doped MoO2 Nanosheet/Multiwalled Carbon Nanotube Hybrid as Efficient Electrocatalyst for Hydrogen Evolution

Highly efficient and precious metal free catalysts for the hydrogen evolution reaction (HER) are of vital importance for renewable energy technologies. Nevertheless, developing simple methods for the synthesis of highly active and superdurable electrocatalysts at low cost for HER still remains a major challenge. In this work, high temperature pyrolysis of (NH4)(6) Mo7O24 center dot 4H(2)O, NaH2PO4 and multi-walled carbon nanotubes (MWCNTs) in Ar atmosphere is carried out to obtain phosphorus dually doped MoO2 nanosheets (MoO2 NSs) and MWCNTs hybrids (MoO(2)Px NSs/P-MWCNTs), which can serve as excellent electrocatalyst for HER. In 0.5 M H2SO4, the hybrid material catalyzes HER with an onset potential of -27 mV (vs. reversible hydrogen electrode, RHE), Tafel slope of 45 mVdec(-1), and an overpotential at 10 mAcm(-2) of only 57 mV. Additionally, it displays favorable stability over 50 h in acidic media.