Phosphorene dominated integrative dual-electric field guiding charge flow for vapor-fed photocatalytic hydrogen evolution.
basic_science · Level V
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- Record sourced from PubMed, PMID 42686784.
- Also identified by DOI 10.1038/s41467-026-76421-7.
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Abstract
Manipulating oriented electron flow and tailored reaction microenvironments in radial-unguided two-dimensional phosphorene remains challenging. Here, we show that Rh-decorated violet/black phosphorus heterostructures, engineered with integrative dual-electric fields from cooperative phase and fringing electric field, enable efficient vapor-fed photocatalytic hydrogen production. This dual-electric field establishes a strong intrinsic charge driving force and edge charge ordering. The vapor-fed gas-solid system minimizes interfacial diffusion barriers and solvent shielding, allowing the field to steer photoelectrons and interact with H<sub>2</sub>O molecules at the edge-located Rh active centers. Analyses reveal that the integrative dual-electric field strengthens polarization and overcomes the water dissociation barrier at the gas-solid interface. The optimized catalyst achieves a H<sub>2</sub>-generation rate of 5218.7 μmol g<sup>-1</sup> h<sup>-1</sup> under simulated sunlight, roughly 2.4 times conventional liquid-solid systems. This work demonstrates that synergy between integrative dual-electric fields and the gas-solid microenvironment overcome the kinetic limitations of phosphorene-based photocatalysts for efficient solar-driven hydrogen conversion.