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3D‐Stretched Film Ni3S2 Nanosheet/Macromolecule Anthraquinone Derivative Polymers for Electrocatalytic Overall Water Splitting

The catalytic mechanism of AQD/S catalyst for overall water splitting is clarified here. AQD/S accelerates electron transport efficiency. The electrons are transferred to the active sites of hydrogen evolution reaction (M–S/N) and oxygen evolution reaction (M–OOH), which catalyzes water splitting, resulting in hydrogen evolution and oxygen evolution....

Stable and Efficient Blue‐Emitting CsPbBr3 Nanoplatelets with Potassium Bromide Surface Passivation

High-quality blue-emitting CsPbBr3 nanoplatelets (NPLs) are synthesized via a facile potassium bromide-enriched surface passivation. The resultant blue-emitting (≈450 nm) CsPbBr3 NPLs show a high PLQY of 87% with excellent thermal stability and photostability. Furthermore, white light LEDs based on the mixture perovskite materials including the blue-emitting...

Attoampere Nanoelectrochemistry

This work presents a novel technique for nanoscale electrochemistry measurements with attoampere current resolution and local cyclic voltammogram measurements. It opens the perspective for a wide range of applications in biophysics, molecular electronics, and electrochemical measurements at the nanoscale. Abstract Electrochemical microscopy...

CO2 Electroreduction to Formate at a Partial Current Density up to 590 mA mg−1 via Micrometer‐Scale Lateral Structuring of Bismuth Nanosheets

Tensile-strain Bi nanosheets with a lateral size in micrometer-scale (Bi LNSs) were prepared via electrochemical cathodic exfoliation in aqueous solution at normal pressure and temperature. Bi LNSs possess high Faradaic efficiencies over 92% and superior partial current density about 590 mA mg−1 for CO2RR to formate at −1.1 V versus RHE in a flow cell...

Advances of Nonlinear Photonics in Low‐Dimensional Halide Perovskites

This review summarizes the current state of the art in the field of nonlinear optics for low-dimensional perovskite materials. Both the recent advances and fundamental physical mechanisms are analyzed and discussed systematically to give a comprehensive understanding of the function of dimension-reduction. Future directions and challenges are also presented...

Cr‐Doped CoP Nanorod Arrays as High‐Performance Hydrogen Evolution Reaction Catalysts at High Current Density

Transition metal phosphides are promising catalysts for hydrogen evolution reaction (HER) but still have the gaps to the commercial noble metal catalysts. This study reports a Cr-doping method to fabricate high-active and high-stability Cr-doped CoP nanorod arrays for HER at high current density, demonstrating that charge transfer and surface Cr species...

Good Solid‐State Electrolytes Have Low, Glass‐Like Thermal Conductivity

Thermal management is critical for the safety, reliability, and performance of Li-ion batteries. Understanding the thermal conductivity of battery materials is crucial for controlling the temperature in batteries. It is found that good crystalline solid electrolytes have glass-like thermal conductivity due to complex crystal structures and atomic-scale...

Managing Defects Density and Interfacial Strain via Underlayer Engineering for Inverted CsPbI2Br Perovskite Solar Cells with All‐Layer Dopant‐Free

An underlayer with a bilayer structure of 2,2′,7,7′-tetrakis(N,N-dip-methoxyphenylamine)-9,9′-spirobifluorene and copper phthalocyanine 3,4′,4″,4′″-tetrasulfonated acid tetrasodium salt is applied to inverted CsPbI2Br perovskite solar cells (PeSCs). As a result, the PeSCs with improved photovoltaic performance and stability can be achieved due to the...

Design and Engineering of Hypoxia and Acidic pH Dual‐Stimuli‐Responsive Intelligent Fluorescent Nanoprobe for Precise Tumor Imaging

Herein, a dual lock-and-key intelligent fluorescent nanoprobe is developed for precise tumor imaging. By elaborately combining the hypoxia-responsive gatekeeper and pH-responsive fluorescent signal reporter into one nanoprobe, it shows good performance in effectively differentiating tumor in mixture cells and tumor-bearing mice model, which indicate...

Confinement of Zinc Salt in Ultrathin Heterogeneous Film to Stabilize Zinc Metal Anode

Ultrathin heterogeneous film with the confinement of zinc salt is successfully constructed on the interface of Zn metal, which realizes the uniform Zn2+ nucleation and prevent the H2O/O2 erosion as well as solvent decomposition of Zn metal anode. This work demonstrates an effective strategy for rational design and synthesis of interface layer for high...

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