Lei Ge

Rational engineering of plasmonic semiconductor heterostructures is pivotal for harvesting near-infrared (NIR) photons and driving efficient solar-to-hydrogen conversion.

Qualitative correlation between the nano-geometric arrangements of BiOI films and photon utilization efficiency elucidates a morphology regulated crystal facet effect.

Efficient charge separation and migration are crucial for advancing semiconductor photocatalysis. Herein, a twinned MnCdS homojunction (T‐MCS) composed of wurtzite MnCdS (WZ‐MCS) and zinc‐blende MnCdS (ZB‐MCS) was synthesized via a hydrothermal method and then coupled with NiSe ₂ through an oil‐bath method to construct a homo‐heterojunction system. The internal twin boundaries in T‐MCS facilitate electron redistribution and enhance carrier transfer, while the interface coupling with NiSe ₂ further promotes spatial charge separation through the heterojunction. Notably, the optimized 5 wt% NiSe ₂ /T‐MCS achieves a remarkable hydrogen production rate of 5.17 mmol g ⁻¹ h ⁻¹ , which is 3.9 and 10.5 times higher than those of pristine T‐MCS (1.33 mmol g ⁻¹ h ⁻¹ ) and pure WZ‐MCS (0.49 mmol g ⁻¹ h ⁻¹ ), respectively. Density functional theory (DFT) calculations, combined with experimental analysis, demonstrate that the synergistic interaction between twin homojunction and NiSe ₂ ‐based heterojunction constructs multiple internal electric fields, thereby facilitating directional charge migration and suppressing recombination, resulting in a superior photocatalytic performance of NiSe ₂ /T‐MCS. This research offers a prospective strategy for designing efficient photocatalysts by integrating twinned structure engineering with a dual‐junction approach.

Using anion exchange membrane water electrolysis (AEMWE) technology to produce hydrogen is one of the effective pathways for future energy development. Designing efficient and stable anode oxygen evolution reaction (OER) catalysts is crucial for improving hydrogen production efficiency. In this study, Fe-doped Ni2P material was designed using a MOF as a precursor, and then combined with CoP nanowire arrays to form Fe-Ni2P@CoP heterojunction composite. Different from previous reports, this work features precise Fe doping (~3.6 at%), a unique 0D/1D morphology, and systematic AEMWE evaluation at 1.0 A cm-2. It is found that doping and interface engineering induce charge transfer between Fe atoms and the heterojunction interfaces, optimizing the overall electronic structure and enhancing the adsorption of reaction intermediates at the active sites, thereby improving electrocatalytic performance. The Fe-Ni2P@CoP catalyst demonstrates highly efficient OER activity and requires only 276 mV overpotential to achieve a current density of 100 mA cm-2, maintaining stability for 100 hours. Subsequently, it is assembled with Pt/C into an AEM electrolyzer, achieving a cell voltage of only 1.77 V at a high current density of 1.0 A cm-2 relevant to industrial applications, demonstrating promising potential for industrial hydrogen production under specific AEMWE operating conditions.