Light and complex 3D MoS2/graphene heterostructures as efficient catalysts for the hydrogen evolution reaction.

摘要: Multi-component 3D porous structures are highly promising hierarchical materials for numerous applications. Herein we show that atomic-layer deposition (ALD) of MoS2 on graphene foams with variable pore size is a methodology to prepare complex heterostructures be used as electrocatalysts the hydrogen evolution reaction (HER). The effect crystallinity studied and trade-off between high density defects naturally presented in amorphous coatings crystalline phase obtained after annealing at 800 °C established. Specifically, an optimal 500 shown yield improved catalytic performance overpotential 180 mV, low Tafel slope 47 mV dec-1, exchange current 17 μA cm-2. ALD conformal, thus advantageous when coating small sizes, required real-world This approach enabled by conformal thin film controlled tuning temperature. results here therefore serve effective general platform design chemically structurally tunable, binder-free, complex, lightweight, efficient catalysis, energy storage, composite materials, sensors, water treatment, more.