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虎门体育官方登录入口网:标题

Rapidly Releasing over 9 wt % of H-2 from NH3BH3-Mg or NH3BH3-MgH2 Composites around 85 degrees C

虎门体育官方登录入口网:作者

作者:Luo, JH (Luo, Junhong)^[1,4 ]; Kang, XD (Kang, Xiangdong)^[3 ]; Chen, CG (Chen, Changan)^[1 ]; Song, JF (Song, Jiangfeng)^[1 ]; Luo, DL (Luo, Deli)^[1 ]; Wang, P (Wang, Ping)^[2 ]

虎门体育官方登录入口网:期刊信息

虎门体育官方登录入口网:摘要

It is ideal that the hydrogen storage materials for vehicular applications can desorb substantial amounts of hydrogen below 85 degrees C, the operating temperature of polymer electrolyte membrane (PEM) fuel cells. Ammonia borane (NH3BH3, AB for short), because of its intriguingly high hydrogen density (i.e., 19.6 wt %) and moderate thermal stability, is widely regarded as a promising on-board hydrogen storage medium. However, at this temperature, both its dehydrogenation kinetics and deliverable H-capacity are far from meeting the requirements for practical applications. Here, we report that the Mg- or MgH2-modified AB can deliver over 9 wt % of H-2 within 1.5 h at approximately 85 degrees C. Such pronounced dehydrogenation properties are found to be enabled by the combination of three factors, including partial phase transition of normal AB to its mobile phase AB* in the starting material, adequate sample thermal conductivity, and sufficiently intensive external energy input. A further mechanistic study indicates that the dehydrogenation of the AB-Mg or AB-MgH2 sample should likely involve a three-step mechanism, with the formation of a metastable or even unstable magnesium amidoborane phase being a central event.

虎门体育官方登录入口网:关键词

KeyWords Plus:HYDROGEN-STORAGE MATERIAL; CELL OPERATING TEMPERATURES; N-H COMPOUNDS; AMMONIA-BORANE; THERMAL-DECOMPOSITION; METAL AMIDOBORANES; CRYSTAL-STRUCTURE; DEHYDROGENATION; THERMOLYSIS; COMPLEX

虎门体育官方登录入口网:作者信息

作者信息

通讯作者地址:Luo, JH (通讯作者)

China Acad Engn Phys, Inst Mat, Jiangyou 621908, Sichuan, Peoples R China.   增强组织信息的名称     Chinese Academy of Engineering Physics

通讯作者地址:Wang, P (通讯作者)

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

地址:

	[ 1 ] China Acad Engn Phys, Inst Mat, Jiangyou 621908, Sichuan, Peoples R China   增强组织信息的名称     Chinese Academy of Engineering Physics
	[ 2 ] South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 3 ] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China   增强组织信息的名称     Institute of Metal Research, CAS     Chinese Academy of Sciences
	[ 4 ] Sichuan Juneng Nucl Technol Engn CO LTD, Jiangyou 621700, Sichuan, Peoples R China

电子邮件地址:luojunhong@caep.cn; mspwang@scut.edu.cn

虎门体育官方登录入口网:出版商

AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA

虎门体育官方登录入口网:类别分类