Yihuang Chen

The performance of photoanodes in photoelectrocatalytic (PEC) water splitting is limited by sluggish surface oxygen evolution reaction (OER) kinetics. Herein, a multifunctional p‐n heterojunction NiFe‐layered double hydroxide/CoS (NiFe‐LDH/CoS), acted as an oxygen evolution co‐catalyst (OECs), is introduced on BiVO ₄ photoanodes for enhanced PEC performance. The formation of the p‐n heterojunction with CoS results in a positively charged NiFe‐LDH, thereby promoting the OER activity. Meanwhile, the p‐n heterojunction between CoS and BiVO ₄ facilitates interfacial charge transport. Moreover, the PEC water oxidation process can be further modified via the photothermal effect of CoS. Due to the collective properties of p‐n heterojunction NiFe‐LDH/CoS cocatalysts, the obtained NiFe‐LDH/CoS/BiVO ₄ photoanodes achieved a record photocurrent density of 6.97 mA cm ⁻² at 1.23 V versus reversible hydrogen electrode (RHE) assisted by near‐infrared light. These findings provide new insight into the rational regulating of surface reaction kinetics and cocatalyst/photoanode interface charge transfer simultaneously.

This review uniquely integrates materials design, synergistic mechanisms, and dynamic characterization in light-assisted heterojunction cathode catalysts for zinc-air batteries.

Electrocatalytic sulfur oxidation‐assisted hydrogen evolution is a promising method that can efficiently degrade sulfur ions in recovered wastewater while cost‐effectively producing hydrogen. However, it still remains a great challenge to develop efficient and stable electrocatalysts with a well‐defined heterointerface and high sulfur tolerance. Herein, we present a facile and liquid‐phase approach to synthesis Cu@Cu ₂ S core‐shell heterostructure nanowires derived from copper nanowires at room temperature for robust sulfide oxidation reaction (SOR)‐assisted H ₂ generation. The Cu@Cu ₂ S core‐shell heterostructure nanowires exhibit superior SOR activity with an ultralow potential of 0.3 V (vs. reversible hydrogen electrode [RHE]) at a current density of 100 mA cm ⁻² . More importantly, the assembled hybrid system with Cu@Cu ₂ S displays remarkable durability over 216 h with negligible activity decay. Combined with the experimental characterizations and theoretical calculations, it was demonstrated that Cu@Cu ₂ S core‐shell heterostructure nanowires possessed reduced transition energy barriers in the rate‐determining *S ₃ to *S ₄ oxidation step and a higher integrated density of states, significantly optimizing adsorption/desorption energy of sulfur intermediates, thereby greatly boosting the catalytic activity and alleviating the sulfur poisoning. Our findings provide a new strategy to develop metal/sulfide core‐shell heterostructure electrocatalysts with substantially enhanced activity and stability.

Prussian-blue-like nanorod felts (PBL-NFs) greatly boost electron transfer, delivering high sensitivity, wide linearity, and stable and selective detection.

Chiral metal halide perovskites hold great potential as circularly polarized luminescent (CPL) materials owing to their exceptional optoelectronic properties. However, chirality‐induced lattice distortions in intrinsically chiral systems often reduce photoluminescence (PL) efficiency, making it challenging to balance chirality and emission performance. In this study, we present a general strategy enabling efficient energy transfer (ET) from chiral quasi‐two‐dimensional (quasi‐2D) perovskite nanosheets to achiral perovskite nanocrystals or dye molecules, achieving extended fluorescence lifetimes and enhanced CPL activity in achiral hosts. We establish a direct correlation between ET efficiency and chiral amplification in quasi‐2D chiral perovskite/achiral perovskite composites. The Janus‐type heterostructures exhibit remarkable ET efficiency and pronounced chiral amplification, leading to a fourfold increase in the photoluminescence quantum yield of achiral components and a luminescence dissymmetry factor ( g _lum ) value of 4.32 × 10 ⁻³ , representing a 50% enhancement compared to pristine chiral perovskites. This design can be extended to achieve full‐spectrum, white‐light CPL emission. The optimized Janus composites show excellent environmental stability, highlighting their practical applicability. Overall, this work establishes a versatile platform for developing high‐efficiency, spectrally tunable, and integrated CPL light sources, providing new opportunities for advanced chiroptoelectronic applications.

Chiral zero‐dimensional hybrid metal halides (0D HMHs) are notable in circularly polarized luminescence (CPL)‐active materials for their chiroptical properties, yet efficient and adjustable CPL in chiral 0D HMHs remain rarely reported. This study presents a novel dual‐doping strategy at A and B sites for tunable CPL in chiral 0D HMHs. For indium‐based HMHs using the purely chiral cation S ‐2‐methylpiperazine, B‐site Sb ³⁺ doping yields significant CPL and intense yellow fluorescence, with near‐unity photoluminescence quantum yield (PLQY) and high luminescence dissymmetry factor ( g _lum ) of 6.7 ×1 0 ⁻² . Notably, the introduction of 2,6‐dimethylpiperazine at the A‐site, alongside Sb ³⁺ B‐site doping, enables synergistic emission that spans blue and yellow light, thereby achieving white light emission in chiral 0D HMHs for the first time. This system achieves a PLQY of 46.08% and a g _lum of 2.1 × 10 ⁻² , underscoring its remarkable CPL performance and spectral tunability. Near‐ultraviolet pumped white light shows 25.5% polarization. This study offers a new strategy for crafting chiral 0D HMHs with tunable spectra, high PLQY, and elevated g _lum .

The advancement of effective and stable non‐precious metal‐based catalysts for oxygen evolution reactions (OER) with a low‐cost and simple technique is essential for the practical application of rechargeable zinc–air battery (ZAB). However, facilitating the deep reconstruction of electrocatalysts to form active species remains a significant challenge. Here, a simple two‐step method composed of impregnation and carbonization process is proposed to synthesize N, S co‐doped microcrystalline cellulose‐derived carbon‐supported nickel sulfide (Ni ₃ S ₂ ) nanoparticles. The in situ Raman reveals that Fe substitution promotes the reconstruction of Ni ₃ S ₂ , accompanied by the cleavage of the Ni–S bond, leading to the deep reconstruction into (Ni,Fe)OOH (DR‐(Ni,Fe)OOH) during the OER. Moreover, density functional theory calculations reveal that Fe substitution induces a downshift in the energy band structure, which lowers the energy barriers and thereby improves the kinetics of the OER. The generated DR‐(Ni,Fe)OOH delivers a relatively low overpotential of 260 mV and superior durability for 50 h under OER condition. The ZAB incorporating DR‐(Ni,Fe)OOH + Pt/C as the air cathode demonstrates superior efficiency and durability, achieving a peak power density of 188.3 mW cm ⁻² , a specific capacity of 811.1 mAh g ⁻¹ , and long‐term stability exceeding 200 h.

The combined mesoporous confinement and dual-cation engineering establish a universal strategy to develop CPL-active perovskites with tunable emission, near-unity PLQY, high FM, and excellent stability.