Fig. 4: HER electrocatalytic activity of MX2 NRs.
From: Longitudinal unzipping of 2D transition metal dichalcogenides
a Linear sweep voltammograms and (b) corresponding Tafel plots for MoS2 NR, 1T′ MoS2 sheet (1 T′ MoS2S), 2H MoS2 porous sheets (2H MoS2PS) and bulk 1T′ MoS2 (1 T′ MoS2B). Pt/C is included as reference. c Electrochemical impedance spectroscopy data for MoS2 NR, 1T′ MoS2S, and 1T′ MoS2B. d Tafel slopes and required potentials to attain a current density of 10 mA/cm2 for all unzipped 1T′ MX2 NRs, compared to exfoliated 1T′ MX2S. e Polarization curves for MoS2 NR before and after 10,000 CV scans. f XPS spectrum showing no Pt contamination during electrocatalytic cycling, inset is zoomed for 50–100 eV. g Chronoamperometric response of MoS2 NR at an applied potential of 80 mV vs. RHE displaying variation of current density up to 20 h. Inset shows photograph of H2 bubbling on the electrode surface (h) TEM of MoS2 NR catalyst after10000 cycles. Scale bar, 0.5 µm. i Associated EDS spectrum.
