Air-stable hydrogen generation materials and enhanced hydrolysis performance of MgH2-LiNH2 composites

标题

Air-stable hydrogen generation materials and enhanced hydrolysis performance of MgH2-LiNH2 composites

作者

作者:Ma, ML (Ma, Miaolian)^[1,2 ]; Ouyang, LZ (Ouyang, Liuzhang)^[1,2 ]; Liu, JW (Liu, Jiangwen)^[1,2 ]; Wang, H (Wang, Hui)^[1,2 ]; Shao, HY (Shao, Huaiyu)^[3 ]; Zhu, M (Zhu, Min)^[1,2 ]

期刊信息

摘要

Hydrolysis of materials in water can be a promising solution of onsite hydrogen generation for realization of hydrogen economy. In this work, it was the first time that the MgH2-LiNH2 composites were explored as air-stable hydrolysis system for hydrogen generation. The MgH2-LiNH2 composites with different composition ratios were synthesized by ball milling with various durations and the hydrogen generation performances of the composite samples were investigated and compared. X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy techniques were adopted to elucidate the performance improvement mechanisms. The hydrolysis properties of MgH2 were found to be significantly enhanced by the introduction of LiNH2. The 4MgH(2)-LiNH2 composite ball milled for 5 h can generate 887.2 mL g(-1) hydrogen in 1 min and 1016 mL g(-1) in 50 min, one of the best results so far for Mg based hydrolysis materials. The LiOH.H2O and NH4OH phases of hydrolysis products from LiNH2 may prevent formation of Mg(OH)(2) passivation layer on the surface and supply enough channels for hydrolysis of MgH2. The MgH2-LiNH2 composites appeared to be very stable in air and no obvious negative effect on kinetics and hydrogen generation yield was observed. These good performances demonstrate that the studied MgH2-LiNH2 composites can be a promising and practicable hydrogen generation system. (C) 2017 Elsevier B.V. All rights reserved.

关键词

作者关键词:Hydrogen generation; MgH2-LiNH2 composites; Hydrolysis; Air-stable system

作者信息

作者信息

通讯作者地址:Ouyang, LZ (通讯作者)

South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.   增强组织信息的名称     South China University of Technology

通讯作者地址:Shao, HY (通讯作者)

Univ Macau, IAPME, Macau, Macau Sar, Peoples R China.   增强组织信息的名称     University of Macau

地址:

	[ 1 ] South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 2 ] China Australia Joint Lab Energy & Environm Mat, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China
	[ 3 ] Univ Macau, IAPME, Macau, Macau Sar, Peoples R China   增强组织信息的名称     University of Macau

电子邮件地址:meouyang@scut.edu.cn; hshao@umac.mo

出版商

ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS

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