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Thiol-functionalized dialkylimidazolium bromide was synthesized, and used as a stabilizer to prepare monodisperse silver nanocrystals through a facile one-pot aqueous approach. It is shown that the multipurpose ligands play a vital role in improving the performance of nanocrystals. The mechanisms of dialkylimidazolium-mediated promotion were analyzed on the basis of the physicochemical properties of the specifically designed ligand.

Designing highly active and durable electrocatalysts remain an ongoing challenge in the oxygen reduction reaction (ORR). Here, the reductive IL/Ti3C2Tx(FA) is produced in a water‐free mixture of formic acid (FA), ionic liquid (IL) and LiF, subsequently, the simultaneous reduction encapsulation trap the Pd nanocatalysts and IL within bilayer carbide‐derived carbon (CDC) to obtain Pd@IL/CDC(FA) with high metal loading up to 69.7%. Thereby, the featured active phases in Pd@IL/CDC(FA) impart potent chemical nanoconfinement to defend metals from dissolution and aggregation, boost mass and electron transfer, and mediate oxidation states and adsorption/desorption of metal Pd in the ORR. Instead of deactivation and Ostwald ripening, the catalytic performances of Pd@IL/CDC(FA) are gradually enhanced in an accelerated durability test up to 20 000 cycles. In a Zn–air battery, the Pd@IL/CDC(FA) cathode gives a specific capacity of 812.6 mAh gZn−1 and a voltage loss of only 41 mV in galvanostatic discharge for 1000 h. The work opens new venues in controllably preparing high activity and durable electrocatalysts from in‐situ generated CDCs. [ABSTRACT FROM AUTHOR]

Ternary composite with immobilization of Fe2O3 nanoparticles (NPs) onto porous polydopamine-reduced graphene oxide framework, abbreviated as Fe2O3@PDA-RGO, was fabricated via a simple, scalable and cost-efficient hydrothermal reaction. The as-prepared 3D Fe2O3@PDA-RGO nanocomposite provides a specific surface area of 119.9 m2 g-1 on account of the well-dispersed Fe2O3 NPs (~35 nm) onto the PDA-RGO sheets as spacer. When applied as a special faradic electrode material in negative potential region, Fe2O3@PDA-RGO can offer 169 mA h g-1 (609 F g−1) at 1 A g-1. The fabricated AC//Fe2O3@PDA-RGO asymmetric supercapacitor (ASC) delivers an energy density of 35.8 W h kg-1 (0.94 mW h cm-3) at 800 W kg-1 (21 mW cm-3) and an outstanding cyclic stability (75.7% capacity retention after 10,000 cycles). The good performance of Fe2O3@PDA-RGO in single-electrode and ASC manifests the potential the ternary composite in energy storage devices. [ABSTRACT FROM AUTHOR]

The article discusses the development of a method to modify the surface of silver nanoparticles (Ag NPs) to create functional materials and meet the application requirements in localized surface plasmon resonance (LSPR) and fields such as optical devices, optical energy conversion and catalysis. It details the methods used and the surface chemistry and color which are controlled by ultraviolet (UV) irradiation. It concludes that the core nanostructure are formed during the interface reactions.