镍基复合催化剂Ni/NiO对MgH储氢性能的改性

Modification of MgH hydrogen storage performance by nickel-based composite catalyst Ni/NiO.

作者信息

Li Wenxuan, Yang Xinglin, Hou Quanhui, Lu Xiaohui, Kong Jie, Su Jianye

机构信息

School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212003, China.

School of Automotive Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.

出版信息

Heliyon. 2024 May 4;10(9):e30688. doi: 10.1016/j.heliyon.2024.e30688. eCollection 2024 May 15.

DOI:10.1016/j.heliyon.2024.e30688

PMID:38756560

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11096980/

Abstract

In this study, the Ni/NiO catalyst was demonstrated to enhance the hydrogen storage performance of MgH. The dehydrogenation of MgH+10 wt% Ni/NiO started at approximately 180 °C, achieving 5.83 wt% of dehydrogenation within 10 min at 300 °C. Completely dehydrogenated, MgH began to rehydrogenate at about 50 °C, absorbing about 4.56 wt% of hydrogen in 10 min at 150 °C. In addition, the activation energies of dehydrogenation and rehydrogenation of MgH+10 wt% Ni/NiO were 87.21 and 34.84 kJ/mol. During the dehydrogenation/rehydrogenation cycle, MgNi/MgNiH could promote hydrogen diffusion, thus enhancing the hydrogen storage performance of Mg/MgH.

摘要

在本研究中，Ni/NiO催化剂被证明可提高MgH的储氢性能。MgH + 10 wt% Ni/NiO的脱氢反应在约180°C开始，在300°C下10分钟内实现了5.83 wt%的脱氢量。完全脱氢后，MgH在约50°C开始再氢化，在150°C下10分钟内吸收约4.56 wt%的氢。此外，MgH + 10 wt% Ni/NiO的脱氢和再氢化活化能分别为87.21和34.84 kJ/mol。在脱氢/再氢化循环过程中，MgNi/MgNiH可促进氢扩散，从而提高Mg/MgH的储氢性能。