Vermiform Ni@CNT derived from one-pot calcination of Ni-MOF precursor for improving hydrogen storage of MgH2

被引：1

作者：

Dai, Zi-yin ^{[1
]}

Zhang, Bing ^{[1
]}

Kimura, Hideo ^{[1
]}

Xiao, Li-rong ^{[1
]}

Liu, Rong-han ^{[1
]}

Ni, Cui ^{[1
]}

Hou, Chuan-xin ^{[1
]}

Sun, Xue-qin ^{[1
]}

Zhang, Yu-ping ^{[1
]}

Yang, Xiao-yang ^{[1
]}

Yu, Rong-hai ^{[2
]}

Du, Wei ^{[1
]}

Xie, Xiu-bo ^{[1
]}

机构：

[1] Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Peoples R China

[2] Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Mat & Performance, Minist Educ, Beijing 100191, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2024年 / 34卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Mg-based hydrogen storage material; activation energy; Ni-loaded carbon nanotubes; catalyst; mechanism; SUPERIOR CATALYSIS; DOPED CARBON; NANOPARTICLES; MAGNESIUM; DEHYDROGENATION; CO; KINETICS; BIOMASS;

D O I：

10.1016/S1003-6326(24)66565-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The Ni-coated carbon nanotubes (Ni@CNT) composite was synthesized by the facile "filtration + calcination" of Ni-based metal-organic framework (MOF) precursor and the obtained composite was used as a catalyst for MgH2. MgH2 was mixed evenly with different amounts of Ni@CNT (2.5, 5.0 and 7.5, wt.%) through ball milling. The MgH2-5wt.%Ni@CNT can absorb 5.2 wt.% H-2 at 423 K in 200 s and release about 3.75 wt.% H-2 at 573 K in 1000 s. And its dehydrogenation and rehydrogenation activation energies are reduced to 87.63 and 45.28 kJ/mol (H-2). The in-situ generated Mg2Ni/Mg2NiH4 exhibits a good catalytic effect due to the provided more diffusion channels that can be used as "hydrogen pump". And the presence of carbon nanotubes improves the properties of MgH2 to some extent.

引用

页码：2629 / 2644

页数：16

共 29 条

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