Fig. 3

Conductivity effect: a Polarization curves depending on the amount of catalyst. Small amounts of f-MoS₂ and large amounts of f-MoS₂ are observed through electrochemical measurements. The inset is the magnified figure of the J–V curve for thick f-MoS₂. b EIS spectra of thick-film f-MoS₂ and e-MoS₂. Both MoS₂ samples demonstrate large electron transport resistance. c I–V curves of the in-plane conductivity of f-MoS₂ with COOH, OH, OME, and ME functional groups; metallic n-MoS₂; and 2H-MoS₂. d I–V curves of the out-of-plane conductivity of f-MoS₂ with COOH, OH, OME, and ME functional groups; metallic n-MoS₂; and 2H-MoS₂