Catalytic effect of double transition metal sulfide NiCo2S4 on hydrogen storage properties of MgH2

被引：19
作者：
Chen, Yangping [1 ]
Sun, Bolin [1 ]
Zhang, Guoqing [1 ]
Wang, Yongzhen [2 ]
Li, Xinxi [1 ]
机构：
[1] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China
[2] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2024年 / 645卷
关键词：
Hydrogen storage; Catalyst; NiCo2S4; SORPTION PROPERTIES; AT-C; PERFORMANCE; NI; NANOPARTICLES; CHALLENGES;
D O I：
10.1016/j.apsusc.2023.158801
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The limited practicality of magnesium hydride (MgH2) is due to its remarkable thermodynamic steadiness and sluggish hydrogen (H-2) storage rate. In this study, NiCo2S4, a double transition metal sulfide, was synthesized and used to promote the kinetic properties of MgH2. Starting release temperature of MgH2- 10 NiCo2S4 composite is 203 degrees C. MgH2-10 NiCo2S4 composite releases 6.11 wt% H-2 in 5 min at 325 degrees C, and absorbs 5.54 wt% H-2 in 1 min at 150 degrees C. Besides, the Arrhenius equation yields the activation energy (E-a) of MgH2-10 NiCo2S4 composite to be 86.50 +/- 2.00 kJ/mol. It is noteworthy that the MgH2-10 NiCo2S4 composite generated MgS, Mg2Ni and Mg2Co in situ active species during the first dehydrogenation process. The synergistic effect between the MgS, Mg2Ni/Mg2NiH4 and Mg2Co/Mg2CoH5 multiphase catalytic systems was generated in the cycle, which observably boosted the kinetics of Mg/MgH2.
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页数：11
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