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Highly emissive semiconductor nanocrystals, or so‐called quantum dots (QDs) possess a variety of applications from displays and biology labeling, to quantum communication and modern security. Though ensembles of QDs have already shown very high photoluminescent quantum yields (PLQYs) and have been widely utilized in current optoelectronic products, QDs that exhibit high absorption cross‐section, high...
Transition metal‐based sulfides exhibit remarkable potential as electrocatalysts for oxygen evolution reaction (OER) due to the unique intrinsic structure and physicochemical characteristics. Nevertheless, currently available sulfide catalysts based on transition metals face a bottleneck in large‐scale commercial applications owing to their unsatisfactory stability. Here, the first fabrication of...
Silicon (Si) is considered a promising commercial material for the next‐generation of high‐energy density lithium‐ion battery (LIB) due to its high theoretical capacity. However, the severe volume changes and the poor conductivity hinder the practical application of Si anode. Herein, a novel core–shell heterostructure, Si as the core and V3O4@C as the shell (Si@V3O4@C), is proposed by a facile solvothermal...
Cation‐intercalated vanadates, which have considerable promise as the cathode for high‐performance potassium metal batteries (PMBs), suffer from structural collapse upon K+ insertion and desertion. Exotic cations in the vanadate cathode may ease the collapse, yet their effect on the intrinsic cation remains speculative. Herein, a stable and dendrite‐free PMB, composed of a Na+ and K+ co‐intercalated...
A hybrid composite of organic–inorganic semiconductor nanomaterials with atomic Au clusters at the interface decoration (denoted as PF3T@Au‐TiO2) is developed for visible–light‐driven H2 production via direct water splitting. With a strong electron coupling between the terthiophene groups, Au atoms and the oxygen atoms at the heterogeneous interface, significant electron injection from the PF3T to...
Most catalysts cannot accelerate uninterrupted conversion of polysulfides, resulting in poor long‐cycle and high‐loading performance of lithium–sulfur (Li–S) batteries. Herein, rich p‐n junction CoS2/ZnS heterostructures embedded on N‐doped carbon nanosheets are fabricated by ion‐etching and vulcanization as a continuous and efficient bidirectional catalyst. The p‐n junction built‐in electric field...
Previously, heat treatment was the only feasible route for tuning the crystal phases of niobium pentoxide (Nb2O5). With the use of Nb2CTx MXene precursors, the first case of phase tuning of Nb2O5 in the low‐temperature hydrothermal synthesis using sulfuric acid regulating agents is presented. By varying the amount of the agent, four pure‐phase Nb2O5 crystals and mixed phases in‐between are obtained...
Photothermal‐Gas Synergistic Cancer Therapy
In article number 2206749, Benhui Hu, Yun Liu, and co‐workers propose a cascade reaction‐promoted CO release strategy to realize augmented photothermal‐gas synergistic cancer therapy. Gold‐based porphyrinic coordination polymer nanosheets synthesized by a simple aqueous phase reaction, with ultrasmall zero‐valent gold as the coordination node, have the advantages...
As a gasotransmitter, carbon monoxide (CO) possesses antitumor activity by reversing the Warburg effect at higher concentrations. The targeted delivery of carbon monoxide‐releasing molecules (CORMs) using nanomaterials is an appealing option for CO administration, but how to maintain CO above the threshold concentration in tumor tissue remains a challenge. Herein, a nanozyme‐catalyzed cascade reaction...
Halide Crystals
In article number 2205981, Ken‐Tsung Wong, Hao‐Wu Lin, and co‐workers demonstrate highly efficient and green emissive manganese halide crystals showing a notable absolute photoluminescence quantum yield ≈ 94% and an unprecedented thermal quenching resistance from 4 to 623 K. The crystals find their applications in phosphor‐converted light emitting diodes, organic light emitting diodes...
The phosphor‐converted light‐emitting diode (PC‐LED) has become an indispensable solid‐state lighting and display technologies in the modern society. Nevertheless, the use of scarce rare‐earth elements and the thermal quenching (TQ) behavior are still two most crucial issues yet to be solved. Here, this work successfully demonstrates a highly efficient and thermally stable green emissive MnI2(XanPO)...
Enhancing the catalytic activity of Pt‐based alloy by a rational structural design is the key to addressing the sluggish kinetics of direct alcohol fuel cells. Herein, a facile one‐pot method is reported to synthesize PtCuRu nanoflowers (NFs). The synergetic effect among Pt, Cu, and Ru can lower the d‐band center of Pt, regulate the morphology, generate Ru‐rich edge, and allow the exposure of more...
The electrocatalytic nitrogen reduction reaction (NRR) provides a sustainable route for NH3 synthesis. However, the process is plagued by the strong NN triple bond and high reaction barrier. Modification of catalyst surface to increase N2 adsorption and activation is crucial. Herein, copper nanoparticles are loaded on the oxygen‐deficient TiO2, which exhibits an enhanced NRR performance with NH3...
Active Sites Modulation
In article number 2200996, Wahyu Prasetyo Utomo, Hao Wu, and Yun Hau Ng report the active site modulation over oxygen‐deficient TiO2 by copper loading, which enhances the electrocatalytic nitrogen reduction reaction to ammonia. Both oxygen vacancies and copper nanoparticles serve as the active sites. The strong metal–support interaction between them also leads to the better...
The design of efficient and sustainable Pt‐based catalysts is the key to the development of direct methanol fuel cells. However, most Pt‐based catalysts still exhibit disadvantages including unsatisfied catalytic activity and serious CO poisoning in the methanol oxidation reaction (MOR). Herein, highly porous PtAg nanoflowers (NFs) with rich defects are synthesized by using liquid reduction combining...
Ultrasmall aluminum nanocrystals (<3 nm) with cluster‐like optical properties are prepared with a simple and robust synthetic chemical method in article number 2002524 by Xiaoyu Cheng, Sailing He, and co‐workers. Phosphonic acids are used to surface‐modify and stabilize aluminum nanocrystals in solution. Ultrasmall aluminum nanocrystals exhibit bright photoluminescence in the ultraviolet range,...
Metal nanoclusters with distinct photophysical and photochemical properties have drawn intense research interests for their applications in optoelectronics, catalysis, and biomedicine. Herein, strong evidence is provided that light metal is capable of generating comparable optical responses of noble metal nanoclusters, but at much shorter wavelength. Air‐stable, size‐uniform, sub‐3 nm aluminum nanocrystals...
Rechargeable Zn/MnO2 batteries using mild aqueous electrolytes are attracting extensive attention due to their low cost, high safety, and environmental friendliness. However, the charge‐storage mechanism involved remains a topic of controversy so far. Also, the practical energy density and cycling stability are still major issues for their applications. Herein, a free‐standing α‐MnO2 cathode for aqueous...
Charge trapping is a long‐standing problem in electrowetting on dielectric, causing reliability reduction and restricting its practical applications. Although this phenomenon is investigated macroscopically, the microscopic investigations are still lacking. In this work, the trapped charges are proven to be localized at the three‐phase contact line (TPCL) region by using three detecting methods—local...
Small molecule solar cells (SMSCs) lag a long way behind polymer solar cells. A key limit is the less controllable morphology of small molecule materials, which can be aggravated when incorporating anisotropic nonfullerene acceptors. To fine‐tune the blending morphology within SMSCs, a π‐conjunction curtailing design is applied, which produces a efficient benzodithionopyran‐cored molecular acceptor...
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