RT journal article
T1 Direct and scalable dual-laser writing of 3D graphene–MoS2 architectures for high-efficiency pH-universal hydrogen electrocatalysis
A1 Berni, Achraf
A1 Ghanam, Abdelghani
A1 García Guzmán, Juan José
A1 Palacios Santander, José María
A1 Amine, Aziz
A1 Cubillana Aguilera, Laura
A1 Ghamouss, Fouad
A2 Química Analítica
K1 Hydrogen evolution reaction
K1 Laser-induced graphene
K1 In situ synthesis
K1 Transition metal dichalcogenides
K1 CO2 laser
K1 UV laser diode
AB The rational design of bifunctional electrocatalysts capable of operating efficiently under both acidic and alkaline conditions remains a critical challenge for hydrogen evolution reaction (HER) technologies. Herein, we report a novel, rapid, and scalable dual-laser approach for the in-situ synthesis of MoS2 nanostructures embedded within three-dimensional (3D) laser-induced graphene (LIG) frameworks for efficient HER electrocatalysis. Leveraging the complementary and synergistic capabilities of CO2 (10.6 μm) and blue near-UV (450 nm) lasers, this method enables maskless, binder-free, and chemical-free fabrication of LIG/MoS2 hybrid electrocatalysts under ambient conditions. The CO2 laser induces rapid graphitization of polyimide sheets into a highly 3D porous and conductive graphene-like structure. The UV laser facilitates localized and gentle energy-efficient crystallization of MoS2 catalyst from Mo/S precursors, yielding a uniform, well-integrated, and cross-linked 3D nanoarray architecture. Structural, morphological, and electrochemical characterizations confirmed the synergistic effect of the dual-laser process. The optimal hybrid catalysts LIGUV–MoS2UV and LIGCO2–MoS2UV, exhibited outstanding HER electrocatalytic activity, achieving low overpotentials of 242 and 233 mV in 1 M KOH and 0.5 M H2SO4, respectively, at 10 mA cm2, along with excellent durability and reaction kinetics. This study introduces a novel, sustainable and industry-compatible platform for designing advanced multifunctional HER catalysts, advancing clean energy applications.
PB Elsevier
SN 0008-6223
YR 2026
FD 2026-02
LK http://hdl.handle.net/10498/39531
UL http://hdl.handle.net/10498/39531
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026