Fig. 10.

a Schematic illustration of the multi-component heterostructure and energy band diagram of a Pt-tipped CdS rod with an embedded CdSe seed. b The Pt tip is clearly seen in the HRTEM and HAADF-STEM images. TEM images of Pt-tipped seeded rods with the lengths of c 27 nm and d 70 nm on average. e Relative quantum efficiency for hydrogen production, obtained from Pt-tipped unseeded CdS rods (yellow), and five different samples of Pt-tipped seeded rods with seed diameters of 3.1 (red) or 2.3 nm (green). Reproduced with permission from Ref. [176]. Copyright 2010, American Chemical Society. f TEM image of a CdS-MoS₂ heterostructure. g HAADF-STEM and h ABF-STEM images of the tip area of a CdS-MoS₂ heterostructure. The red triangles indicate the position of MoS₂ NSs. i Comparison of H₂ production activities using CdS NWs and CdS-MoS₂ heterostructures with different loading amounts of MoS₂ NSs as catalysts. Reproduced with permission from Ref. [117]. Copyright 2017, American Chemical Society. (Color figure online)