Effect of Few-Layer Ti3C2Tx Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH2

Haiguang Gao; Yuting Shao; Rui Shi; Yana Liu; Jinglian Zhu; Jiangchuan Liu; Yunfeng Zhu; Jiguang Zhang; Liquan Li; Xiaohui Hu

doi:10.1021/acsami.0c15686

Effect of Few-Layer Ti₃C₂T_x Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH₂

ACS Appl Mater Interfaces. 2020 Oct 21;12(42):47684-47694. doi: 10.1021/acsami.0c15686. Epub 2020 Oct 12.

Authors

Haiguang Gao^{1

2}, Yuting Shao^{1

2}, Rui Shi^{1

2}, Yana Liu^{1

2}, Jinglian Zhu^{1

2}, Jiangchuan Liu^{1

2}, Yunfeng Zhu^{1

2}, Jiguang Zhang^{1

2}, Liquan Li^{1

2}, Xiaohui Hu^{1

2}

Affiliations

¹ College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, PR China.
² Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, PR China.

PMID: 33044811
DOI: 10.1021/acsami.0c15686

Abstract

For the first time, few-layer Ti₃C₂T_x (FL-Ti₃C₂T_x) supporting highly dispersed nano-Ni particles with an interconnected and interlaced structure was elaborated through a self-assembly reduction process. FL-Ti₃C₂T_x not only acts as a supporting material but also self-assembles with Ni²⁺ ions through the electrostatic interaction, assisting in the reduction of nano-Ni. After ball milling with MgH₂, Ni₃₀/FL-Ti₃C₂T_x (few-layer Ti₃C₂T_x supported 30 wt % nano-Ni via self-assembly reduction) shows superior catalytic activity for MgH₂. For example, MgH₂-5 wt % Ni₃₀/FL-Ti₃C₂T_x can release approximately 5.83 wt % hydrogen within 1800 s at 250 °C and absorb 5 wt % hydrogen within 1700 s at 100 °C. The combined effects of finely dispersed nano-Ni in situ-grown on FL-Ti₃C₂T_x, large specific area of FL-Ti₃C₂T_x, multiple-valence Ti (Ti⁴⁺, Ti³⁺, Ti²⁺, and Ti⁰) derived from FL-Ti₃C₂T_x, and the electronic interaction between Ni and FL-Ti₃C₂T_x can explain the superb hydrogen storage performance. Our results will attract more attention to the elaboration of the metal/FL-Ti₃C₂T_x composite via self-assembly reduction and provide a guideline to design high-efficiency composite catalysts with MXene in hydrogen storage fields.

Keywords: MXene; catalyst; hydrogen storage materials; magnesium hydride; self-assembly.