Guangxi University

High‐entropy amorphous catalysts (HEACs) integrate multielement synergy with structural disorder, making them promising candidates for water splitting. Their distinctive features—including flexible coordination environments, tunable electronic structures, abundant unsaturated active sites, and dynamic structural reassembly—collectively enhance electrochemical activity and durability under operating conditions. This review summarizes recent advances in HEACs for hydrogen evolution, oxygen evolution, and overall water splitting, highlighting their disorder-driven advantages over crystalline counterparts. Catalytic performance benchmarks are presented, and mechanistic insights are discussed, focusing on how multimetallic synergy, amorphization effect, and in‐situ reconstruction cooperatively regulate reaction pathways. These insights provide guidance for the rational design of next‐generation amorphous high‐entropy electrocatalysts with improved efficiency and durability.

Piezocatalysis, as an eco-friendly and sustainable strategy for hydrogen peroxide (H₂O₂) synthesis, enables efficient harvesting of ambient mechanical energy and utilization of ubiquitous water/oxygen resources. Nevertheless, its practical implementation faces severe challenges due to sluggish charge carrier migration kinetics. To address this limitation, herein a nanosheet-structured BiVO₄/Bi₂MoO₆ heterojunction was innovatively constructed via one-step hydrothermal method. Based on a series of experimental analysis and the density functional theory (DFT) calculations, an intimate type-II heterojunction between BiVO₄ and Bi₂MoO₆ was demonstrated, establishing robust interfacial electric field. Under ultrasound vibration, the optimized BiVO₄/Bi₂MoO₆ heterojunction demonstrated an exceptional H₂O₂ yield of 916.8 μmol·g^-1·h^-1 in pure water, which was 8.2 times and 6.9 times higher than pure BiVO₄ and Bi₂MoO₆, respectively, surpassing the majority of reported piezocatalysts. This outperformance was attributed to the coupling between the interfacial electric field and the induced piezoelectric polarization under mechanical stress, which not only endowed the heterojunction with stronger piezoelectric response as verified by the piezoresponse force microscopy (PFM) and piezoelectric nanogenerator (PENG) characterizations, but also facilitated charge carrier separation and transportation as supported by the electrochemical and photoluminescence results. In addition, the piezocatalytic H₂O₂ generation pathway with BiVO₄/Bi₂MoO₆ heterojunction was also investigated, and a two-step single-electron water oxidation reaction (WOR) dominated channel was proved. The dual-electric-field synergy strategy in this study is hoped to provide insights for the design of high-performance piezocatalysts towards H₂O₂ production and offer deep understandings to the development of mechanical-to-chemical energy conversion catalytic systems.

Although magneto-optical phenomena have been studied for decades in low dimensional materials, studying the impact of quantum confinement effects on magneto-optical properties remains a significant challenge. Here, the surface-induced quantum confinement effect in a Sn doped CdS microcone was demonstrated through photoluminescence spectroscopy and angle-resolved photoluminescence spectroscopy. In this structure, the quantum confinement effect has been proven to greatly enhance the tuning range of magneto-optics polarization, and its tuning range nearly 100 %. Through magneto-optical measurement characterization, we attribute ultrabroadband polarization control to the Faraday magneto-optical rotation. Additional first-principles calculations have suggested that the enhancement of the magneto-optical effect is related to isotropic exchange interaction from the hybridization of Sn atoms d-orbitals. Our results highlight the importance of quantum confinement effects in magneto-optical polarizations and motivate novel directions for the manipulation of material properties.