A fluorine and boron co-modified Cu/NC catalyst with adjustable electronic structure was obtained for robust electrocatalytic CO2-to-CH4, the obtained F, B-Cu/NC catalyst exhibited 57% faradaic efficiency for CH4 production at -1.377 V vs. RHE, surpassing that of unmodified or single-modified catalysts.
Spatially controlled confinement of catalytic enzymes within nanoshells holds substantial potential for applications in bioreactors, synthetic cells, and artificial spores. The utilization of amorphous calcium phosphate (CaP) precursors enables the extremely rapid (<5 seconds) construction of thick (∼400 nm) CaP nanoshells, stratified with distinct enzymes, on various tannic acid-primed substrates. Saccharomyces cerevisiae cells are nanoencapsulated with enzyme-embedded, multilayered CaP nanoshells in a cytocompatible manner, providing an advanced chemical tool for interfacing living cells with functional entities in a spatially controlled configuration.
A transition-metal-free C-H functionalization method has been developed for the synthesis of aryl sulfoximines. This two-step protocol involves the 3,5-dimethyl-4-isoxazolyliodonium salt as an intermediate. The iodonium salt is obtained with high site selectivity from arenes via C-H activation, and is then converted into sulfoximines through a ligand coupling at the hypervalent iodine center with sulfinamides. The process is mild and does not require transition metals, enabling the late-stage incorporation of chiral sulfonimidoyl groups into drug candidates.
The rapid growth of technologies and miniaturization of electronic devices demand advanced the use of high-powered energy storage devices. The energy storage device are utilized in modern wearable electronics, stretchable screens, and electric vehicles. Due to their favorable electrochemical properties, nanomaterials have been used as electrodes for supercapacitors (SCs) with high power density, but they generally suffer from lower energy density than batteries. Compared to various nanomaterials, MXenes and transition metal chalcogenides (TMCs) have shown great potential for energy storage applications such as SCs. TMCs are gaining attention due to their stable electrochemical nature, adjustable surface activity, high electric conductivity, abundant chemically active sites, and stable cycling performance. However, the interlayer restacking and agglomeration of 2D materials limit their cycling performance. To overcome this, TMCs@MXene heterostructures have been developed, offering structurally stable electrodes with enhanced chemical active sites. In this review, we discuss recent advances in the development of different TMCs@MXene-based hybrids for the design of high performance SCs with improved specific capacitance, cycling life, energy density, and power density. The recent developments of this research field focusing on MXene-transition metal sulfides, MXene-transition metal selenides, and MXene-transition metal tellurides are elaborately discussed. Theoretical calculations carried out to understand the charge-storage mechanisms in these composites are reviewed. The importance of bimetallic TMCs and MXene heterostructure for enhanced energy storage is also highlighted.
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