Scalable-doped Nanoporous 1T″ ReSe₂ via a General Surface Co-Alloy Strategy

Abstract

Reliable and controllable doping of 2D transition metal dichalcogenides is an efficient approach to tailor their physicochemical properties and expand their functional applications. However, precise control over dopant distribution and scalability of the process remains a challenge. Here, we report a general method to achieve scalable in situ doping of centimeter-sized bicontinuous nanoporous ReSe2 films with transition metal atoms via surface coalloy growth. The distinct strains induced by the bending curvature of nanoporous structures and uniform dopants result in a local 1T′ to 1T″ structure phase transition over nanoporous ReSe2 films. The as-prepared nanoporous Ru-ReSe2 with high 1T″ phase exhibits preferable electrochemical activity in hydrogen evolution reaction. The work demonstrates a unique and general approach to synthesize uniformly-doped transition metal dichalcogenides with 3D bicontinuous nanoporous structure, which can be scaled up to batch production for various applications.

Phosphorus dopants triggered single-atom platinum catalysis for efficient hydrogen evolution in proton exchange membrane electrolyzers

“…First, a self-supported nanoporous gold (NPG) substrate was obtained by selectively etching Ag in Au 35 Ag 65 alloy through a dealloying strategy. 28,29 Then, the deposition of MoS 2 on NPG and the doping of P were accomplished via a two-step CVD process, respectively. 30,31 Subsequently, spontaneous reduction in the impregnation strategy and the following vacuum heating process successfully introduced isolated Pt atoms into P-doped MoS 2 .…”