Facile synthesized Fe nanosheets as superior active catalyst for hydrogen storage in MgH2
Facile synthesized Fe nanosheets as superior active catalyst for hydrogen storage in MgH2
复制标题
简便合成的 Fe 纳米片作为 MgH2 储氢的优异活性催化剂
DOI：
10.1016/j.ijhydene.2019.06.065
复制
发表时间：
2019-08
影响因子：
7.2
通讯作者：
Chen Lixin
中科院分区：
文献类型：
--
作者：
Zhang Liuting;Ji Liang;Yao Zhendong;Yan Nianhua;Sun Ze;Yang Xinglin;Zhu Xinqiao;Hu Shuanglin;Chen Lixin
MgH 2在温和条件下的可逆储氢是实现“氢经济”的重要途径，而廉价高效催化剂的开发是其主要挑战。本文采用湿化学球磨法制备了二维层状Fe，并证实其能显著提高MgH 2的储氢性能。向MgH 2中少量添加5wt%的Fe纳米片将起始解吸温度降低至182.1 °C，并且能够在300 °C下在10分钟内快速释放5.44wt%的H2。此外，脱氢样品在200 °C下在3.2MPa的氢气压力下在10 min内吸收6wt%的H2。随着Fe纳米片的掺杂，MgH 2脱氢反应的表观活化能降低到40.7 ± 1.0 kJ mol−1。进一步的从头算结果表明，Fe的存在延长了Mg-H键长，降低了Mg-H键强度.我们相信，这项工作将有助于在储氢和其他能源相关问题领域设计用于催化的普通金属。
Reversible hydrogen storage in MgH2under mild conditions is a promising way for the realization of “Hydrogen Economy”, in which the development of cheap and highly efficient catalysts is the major challenge. Herein, A two-dimensional layered Fe is prepared via a facile wet-chemical ball milling method and has been confirmed to greatly enhance the hydrogen storage performance of MgH2. Minor addition of 5 wt% Fe nanosheets to MgH2decreases the onset desorption temperature to 182.1 °C and enables a quick release of 5.44 wt% H2within 10 min at 300 °C. Besides, the dehydrogenated sample takes up 6 wt% H2in 10 min under a hydrogen pressure of 3.2 MPa at 200 °C. With the doping of Fe nanosheets, the apparent activation energy of the dehydrogenation reaction for MgH2is reduced to 40.7 ± 1.0 kJ mol−1. Furtherab initiocalculations reveal that the presence of Fe extends the Mg–H bond length and reduces its bond strength. We believe that this work would shed light on designing plain metal for catalysis in the area of hydrogen storage and other energy-related issues.
登录
查看更多内容
Na2Ti3O7 纳米管提供大量氢扩散通道，增强 MgH2 的储氢性能
影响因子：
11.9
作者：
Zhang L. T.;Chen L. X.;Fan X. L.;Xiao X. Z.;Zheng J. G.;Huang X.
通讯作者：
Huang X.
立方碳纳米盒负载的氧化钒纳米颗粒作为用于 MgH2 储氢的高活性催化剂前体
影响因子：
11.9
作者：
Wang Zeyi;Ren Zhuanghe;Jian Ni;Gao Mingxia;Hu Jianjiang;Du Fang;Pan Hongge;Liu Yongfeng
通讯作者：
Liu Yongfeng
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
影响因子：
17.6
作者：
Shih-Yi Liu;P. Kundu;T. Huang;Y. Chuang;F. Tseng;Yue Lu;Manling Sui;Fu-Rong Chen
通讯作者：
Shih-Yi Liu;P. Kundu;T. Huang;Y. Chuang;F. Tseng;Yue Lu;Manling Sui;Fu-Rong Chen
影响因子：
27.8
作者：
Hongyu Zhang;Guanglin Xia;Jian Zhang;Dalin Sun;Zaiping Guo;Xuebin Yu
通讯作者：
Hongyu Zhang;Guanglin Xia;Jian Zhang;Dalin Sun;Zaiping Guo;Xuebin Yu