Analogous Chelation to Boost Utilization of Sb in Sb Nanoparticles and N-doped Carbon Composites for Enhancing Potassium Storage.

Antimony (Sb) is an attractive anode material for potassium-ion batteries (PIBs), but it suffers from aggregation during the charging-discharging process, thus causing embedded active sites and collapsed structure. The analogous chelation refers to the reaction in which the central nanoparticle is linked to the matrix through multiple coordination bonds to form a stable composite. This strategy can inhibit aggregation and maintain the nanosized structure of Sb, thus activating the utilization of Sb active sites and structural stability.

P-Induced Permeation of Nickel into WO Octahedra to Form a Synergistic Catalyst for Urea Oxidation.

Small-molecule induction can lead to the oriented migration of metal elements, which affords functional materials with synergistic components. In this study, phosphating nickel foam (NF)-supported octahedral WO with phosphine affords P-WO /NF electrocatalyst. Ni is found to form Ni-P bonds that migrate from NF to WO under the induction of P, resulting in the complex oxides W Ni O and Ni P O in the particle interior and nickel phosphide on the octahedral grain surface.

Transition behaviors of γ-β/β in V-, Cr-, Mn-doped TiAl alloys.

The behavior of γ-β/β phase transition in TiAl alloy doped with β stabilizers (V, Cr, Mn) are studied by using the first principles method. It is found that alloying addition as well as anharmonic lattice vibration and disordered atomic occupation contributes to enhance the stability of cubic structure and accordingly introduce the disordered β phase into the high-temperature microstructure. The formation of low-temperature β phase originates from not only the stabilization of cubic structure but also the destabilization of tetragonal structure.