Authors
Muhammad Ahsan Naseeb, Maida Murtaza, Komal Farooq, Waqas Ali Shah, Amir Waseem
Published in
Nanoscale advances. Jul 22, 2025. Epub Jul 22, 2025.
Abstract
Molybdenum carbide (Mo x C) has gained attention for water splitting due to its electronic structure resembling to Pt and have high electrochemical performance. We designed porous nanostructured phosphorus/sulfur co-doped Ni, Co phosphosulphide and molybdenum carbide heterostructures Mo x C(Mo2C-MoC) through confined carburization within a metal-organic framework (MOF) matrix combined with a phosphosulfurization strategy. Starting from a carbon source consisting of NiCo-MOF incorporating molybdenum trioxide, we prepared MOF-derived NiCo-Mo x C nanorods via carbonization, which exhibited decent electrocatalytic performance for the hydrogen evolution reaction (HER) by electrochemical water splitting. The NiCo-Mo x C showed low overpotentials of 153 mV and 157 mV vs. RHE at a current density of 10 mA cm-2 in 0.5 M H2SO4 and 1 M KOH, respectively. Phosphosulfurization of NiCo-Mo x C, performed under controlled conditions, resulted in the formation of NiPS-CoPS-Mo x C, which demonstrated superior HER performance than the precursor NiCo-Mo x C with overpotentials of 75.2 mV and 86.6 mV in 0.5 M H2SO4 and 1 M KOH, respectively and an overpotential of 184.5 mV at 10 mA cm-2 for the oxygen evolution reaction (OER). The durability of the NCMCSP-based electrolyzer for the overall water splitting was evaluated by measuring the voltage over time at a constant current density of 20 mA cm-2 for 12 h.
PMID:
40704283
Bibliographic data and abstract were imported from PubMed on 24 Jul 2025.
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