Fig. 4 | Nature Communications

Fig. 4

From: Boundary activated hydrogen evolution reaction on monolayer MoS2

Fig. 4

Multi-hierarchy monolayer MoS2 catalysts for HER. a Schematic structure of the multi-hierarchy MoS2 catalysts with both high density of domain and phase boundaries. b Polarization curves for pristine type-II samples, pristine type-III samples, a series of heterophase type-III samples with different phase boundary densities and Pt. c Tafel plots of the corresponding curves in b. d HER performance of a multi-hierarchy MoS2 catalyst in 0.5-M H2SO4 (red curve) and 1-M KOH (purple curve). e Time-dependent current density curve for a multi-hierarchy MoS2 catalyst under static overpotential of 150 mV for 200 h. f Demonstration of the catalytic HER activity in 0.5 M H2SO4 from a multi-hierarchy MoS2 catalyst with a size of 4 inches in diameter. Inset: photograph of pristine as-grown wafer-scale MoS2 on sapphire substrate

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