Feather-like few-layer WSe2 nanosheets grown on W substrates: an excellent electrocatalyst for the hydrogen evolution reaction

Few-layer WS 2 or WSe 2 nanosheets were grown on W substrates by CVD, and feather-like WSe 2 delivered excellent performances as HER electrocatalyst in acid including low overpotential of 141 mV to yield 10 mA cm − 2 , outperforming other TMDs thin films.