The development of highly-active and robust catalysts is crucial for green hydrogen production through water electrolysis. While noble metals like platinum are currently used, their scarcity, high cost, and performance limitations hinder large-scale implementation. This work reports the synthesis of a tantalum sulfide (Ta-TaS₂) monolith catalyst with a mechanically robust and electrically near-zero-resistance interface, resulting in superior hydrogen evolution performance, rapid charge transfer, and excellent durability. The catalyst achieves a current density of 2000 mA cm⁻² at a low overpotential of 398 mV and shows negligible performance decay after 200 hours of operation at high current densities.
