Mn nanoparticles enhanced dehydrogenation and hydrogenation kinetics of MgH2 for hydrogen storage

被引：51

作者：

Chen, Yan ^{[1
]}

Zhang, Hao-yu ^{[1
]}

Wu, Fu-ying ^{[2
]}

Sun, Ze ^{[1
]}

Zheng, Jia-guang ^{[1
]}

Zhang, Liu-ting ^{[1
]}

Chen, Li-xin ^{[3
]}

机构：

[1] Jiangsu Univ Sci & Technol, Sch Energy & Power, Zhenjiang 212003, Jiangsu, Peoples R China

[2] Jiangsu Univ Sci & Technol, Anal & Testing Ctr, Zhenjiang 212003, Jiangsu, Peoples R China

[3] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2021年 / 31卷 / 11期

基金：

中国国家自然科学基金;

关键词：

hydrogen storage material; magnesium hydride; Mn nanoparticles; catalytic mechanism; reversibility; MAGNESIUM-BASED MATERIALS; ENERGY; NI; THERMODYNAMICS; MICROSTRUCTURE; SORPTION; FE; 1ST-PRINCIPLES; CATALYSTS; OXIDES;

D O I：

10.1016/S1003-6326(21)65743

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Mn nanoparticles (nano-Mn) were successfully synthesized and doped into MgH2 to improve its de/hydrogenation properties. Compared with MgH2, the onset desorption temperature of 10 wt.% nano-Mn modified MgH2 was decreased to 175 degrees C and 6.7, 6.5 and 6.1 wt.% hydrogen could be released within 5, 10 and 25 min at 300, 275 and 250 degrees C, respectively. Besides, the composite started to take up hydrogen at room temperature and absorbed 2.0 wt.% hydrogen within 30 min at low temperature of 50 degrees C. The hydrogenation activation energy of MgH2 was reduced from (72.5 +/- 2.7) to (18.8 +/- 0.2) kJ/mol after doping with 10 wt.% nano-Mn. In addition, the MgH2 + 10 wt.% nano-Mn composite exhibited superior cyclic property, maintaining 92% initial capacity after 20 cycles.

引用

页码：3469 / 3477

页数：9

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