Interfacial Strain-Modulated Nanospherical Ni P by Heteronuclei-Mediated Growth on Ti C T MXene for Efficient Hydrogen Evolution.

Interface modulation of nickel phosphide (Ni P) to produce an optimal catalytic activation barrier has been considered a promising approach to enhance the hydrogen production activity via water splitting. Herein, heteronuclei-mediated in situ growth of hollow Ni P nanospheres on a surface defect-engineered titanium carbide (Ti C T ) MXene showing high electrochemical activity for the hydrogen evolution reaction (HER) is demonstrated. The heteronucleation drives intrinsic strain in hexagonal Ni P with an observable distortion at the Ni P@Ti C T MXene heterointerface, which leads to charge redistribution and improved charge transfer at the interface between the two components.

Core-Shell Structured MXene@Carbon Nanodots as Bifunctional Catalysts for Solar-Assisted Water Splitting.

The design of nonprecious bifunctional electrocatalysts with high activity and prolonged durability in a wide pH range is essential for the development of the highly efficient, cost-effective, and simplified overall water splitting systems. Here, we report core-shell structured MXene@carbon (MX@C) nanodot hybrids with high bifunctional activity, where N-doped carbon shells are grown in a heteroepitaxial manner strongly interacting with the MXene core. The resulting MX@C nanodot hybrids show enhanced catalytic activity for electrochemical hydrogen evolution reaction (HER) in various pH media from 0 to 14.