A robust electrocatalytic activity toward the hydrogen evolution reaction from W/W2C heterostructured nanoparticles coated with a N,P dual-doped carbon layer.

W/W2C heterostructured nanoparticles encapsulated by N,P dual-doped carbon (W/W2C@NPC) fabricated by the carbonization of in situ polymerized polyaniline (PANI) and phosphotungstic acid require low overpotentials of 55 mV and 82 mV vs. RHE to achieve a cathodic current density of 10 mA cm-2 in acidic and alkaline electrolytes, respectively.