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Updated: Mar 13, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
Two-Dimensional NiTi-LDH: Rational Construction and Synergistic Catalysis for Accelerated MgH2 Hydrogen Storage
Junqi Qiu1, Yang Hu1, Ying Yang1
1College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
None:
MgH2 is a promising hydrogen storage material due to its high capacity (7.6 wt %), low cost, and environmental benignity, but its application is hindered by sluggish kinetics and high thermodynamic stability. Constructing catalytic systems has proven effective in addressing these limitations. Herein, we report a two-dimensional NiTi-layered double hydroxide (NiTi-LDH) catalyst that achieves atomic-level dispersion of bimetallic Ni-Ti active sites. The MgH2-6 wt % NiTi-LDH composite exhibits significantly enhanced dehydrogenation performance, with the onset desorption temperature reduced from 290.1 °C (pristine MgH2) to 230.1 °C. The composite also demonstrates exceptional cycling stability, retaining 96.53% of its initial capacity after 100 cycles at 300 °C. Microstructural analysis reveals that NiTi-LDH nanosheets are uniformly dispersed in the MgH2 matrix, providing abundant bimetallic active sites. During cycling, in situ formation of Mg2Ni/Mg2NiH4 and Ti/TiHx species facilitates hydrogen diffusion and provides favorable nucleation sites for the reversible Mg/MgH2 phase transformation, collectively enhancing hydrogen storage kinetics and reversibility.
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