Fig. 5
From: WS2–WC–WO3 nano-hollow spheres as an efficient and durable catalyst for hydrogen evolution reaction
HER catalytic activities of the WS2 NF, WS2 NF(AT), WS2–WC–WO3 NH and WS2–WC–WO3 NH (AT) samples. a Polarization curves of the WS2 NF, WS2 NF(AT), WS2–WC–WO3 NH, and WS2–WC–WO3 NH (AT) samples and commercial Pt/C at a scan rate of 5 mV s−1, b Tafel plots of the WS2 NF, WS2 NF(AT), WS2–WC–WO3 NH, and WS2–WC–WO3 NH (AT) samples and standard Pt/C, c EIS results with the inset showing an equivalent circuit and d double-layer capacitances of the WS2 NF and WS2–WC–WO3 NH samples