Semiconducting Pt Structures Stabilized on 2D MoS₂ Crystals Enable Ultrafast Hydrogen Evolution.

ABSTRACT: Metallic platinum is the best and most widely investigated catalyst for hydrogen evolution, yet little is known about Pt in its semiconducting form. Here, it is shown that semiconducting Pt structures with a thickness of only two atomic layers (0.4 nm) can be stabilized on 2D MoS₂ crystals. Reducing the thickness of Pt particles below the Fermi wavelength (0.5 nm) opens a sizeable (0.3-0.4 eV) gap in their electronic structure. The resulting electronic structure is qualitatively different from both the metallic bands of larger Pt nanoparticles and the atomic orbitals of Pt single atom catalysts while displaying the highest intrinsic activity among them. Semiconducting Pt bilayers enable H₂ production at ten times higher rates (≈1400 H₂ s^-1 @ η =

SUBMITTER: Ollar T 

PROVIDER: S-EPMC12447036 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature