Fig. 4 | Nature Communications

Fig. 4

From: Nitrogen-doped tungsten carbide nanoarray as an efficient bifunctional electrocatalyst for water splitting in acid

Fig. 4

HER performance and comparison. a LSV of commercial Pt/C, WC, WC nanoarray, N-WC, and N-WC nanoarray in 0.5 M H2SO4 with iR correction at a scan rate of 1 mV/s. b Tafel plots calculated from a. c AC impedance of WC, WC nanoarray, N-WC, N-WC nanoarray, and commercial Pt/C catalysts. d Stability test of N-WC nanoarray at the overpotential of −0.144 V for 10 h, and then −0.156 V for another 10 h with iR correction

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