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

Abstract

Abstract 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 super‐durable electrocatalysts at low cost for HER still remains a major challenge. In this work, high temperature pyrolysis of (NH 4 ) 6 Mo 7 O 24 ⋅ 4H 2 O, NaH 2 PO 4 and multi‐walled carbon nanotubes (MWCNTs) in Ar atmosphere is carried out to obtain phosphorus dually doped MoO 2 nanosheets (MoO 2 NSs) and MWCNTs hybrids (MoO 2 P x NSs/P‐MWCNTs), which can serve as excellent electrocatalyst for HER. In 0.5 M H 2 SO 4 , the hybrid material catalyzes HER with an onset potential of −27 mV (vs. reversible hydrogen electrode, RHE), Tafel slope of 45 mV dec −1 , and an overpotential at 10 mA cm −2 of only 57 mV. Additionally, it displays favorable stability over 50 h in acidic media.